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Prof. Dr. Thomas Zentgraf

Prof. Dr. Thomas Zentgraf

Ultraschnelle Nanophotonik

Leiter - Professor

Center for Optoelectronics and Photonics (CeOPP)

Vorsitzender - Professor

Institut für Photonische Quantensysteme (PhoQS)

Mitglied - Professor

Sonderforschungsbereich Transregio 142

Mitglied - Professor - Projektleiter

+49 5251 60-5865
+49 5251 60-5886
Pohlweg 47-49
33098 Paderborn
Prof. Dr. Thomas Zentgraf
10/2020 - heute

Vorsitzender des Center for Optolectronics & Photonics Paderborn

04/2011 - heute

Professor for Applied Physics, Head of the Ultrafast Nanophotonics Group

Department of Physics, Paderborn University, Germany

08/2015 - 01/2016

Guest Professor

Department of Physics, Kasetsart University, Bangkok, Thailand

09/2007 - 03/2011

Research Associate

Department for Mechanical Engineering, University of California at Berkeley, USA

07/2006 - 08/2007


4th Physics Institute, University of Stuttgart, Germany

01/2003 - 06/2006

PhD student

Max Planck Institute for Solid State Research, Stuttgart, Germany

09/2005 - 11/2005

Visiting Researcher

Lawrence Berkeley National Laboratory, Berkeley (USA)

03/2000 - 01/2001

Master Student

Fraunhofer Institute for Applied Optics and Precision Mechanics, Jena, Germany

Liste im Research Information System öffnen


Optical secret sharing with cascaded metasurface holography

P. Georgi, Q. Wei, B. Sain, C. Schlickriede, Y. Wang, L. Huang, T. Zentgraf, Science Advances (2021), 7(16)

<jats:p>Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data. It describes the problem of splitting a secret into different shares, without revealing any information to its shareholders. Here, we demonstrate an all-optical solution for secret sharing based on metasurface holography. In our concept, metasurface holograms are used as spatially separable shares that carry encrypted messages in the form of holographic images. Two of these shares can be recombined by bringing them close together. Light passing through this stack of metasurfaces accumulates the phase shift of both holograms and optically reconstructs the secret with high fidelity. In addition, the hologram generated by each single metasurface can uniquely identify its shareholder. Furthermore, we demonstrate that the inherent translational alignment sensitivity between two stacked metasurface holograms can be used for spatial multiplexing, which can be further extended to realize optical rulers.</jats:p>

Recent progress on metasurfaces: applications and fabrication

G. Yoon, T. Tanaka, T. Zentgraf, J. Rho, Journal of Physics D: Applied Physics (2021), 54


Dielectric travelling wave antennas for directional light emission

T. Leuteritz, H. Farheen, S. Qiao, F. Spreyer, C. Schlickriede, T. Zentgraf, V. Myroshnychenko, J. Förstner, S. Linden, Optics Express (2021), 29(10)

We present a combined experimental and numerical study of the far-field emission properties of optical travelling wave antennas made from low-loss dielectric materials. The antennas considered here are composed of two simple building blocks, a director and a reflector, deposited on a glass substrate. Colloidal quantum dots placed in the feed gap between the two elements serve as internal light source. The emission profile of the antenna is mainly formed by the director while the reflector suppresses backward emission. Systematic studies of the director dimensions as well as variation of antenna material show that the effective refractive index of the director primarily governs the far-field emission pattern. Below cut off, i.e., if the director’s effective refractive index is smaller than the refractive index of the substrate, the main lobe results from leaky wave emission along the director. In contrast, if the director supports a guided mode, the emission predominately originates from the end facet of the director.

Extremely low-energy ARPES of quantum well states in cubic-GaN/AlN and GaAs/AlGaAs heterostructures

M. Hajlaoui, S. Ponzoni, M. Deppe, T. Henksmeier, D.J. As, D. Reuter, T. Zentgraf, G. Springholz, C.M. Schneider, S. Cramm, M. Cinchetti, Scientific Reports (2021), 11

<jats:title>Abstract</jats:title><jats:p>Quantum well (QW) heterostructures have been extensively used for the realization of a wide range of optical and electronic devices. Exploiting their potential for further improvement and development requires a fundamental understanding of their electronic structure. So far, the most commonly used experimental techniques for this purpose have been all-optical spectroscopy methods that, however, are generally averaging in momentum space. Additional information can be gained by angle-resolved photoelectron spectroscopy (ARPES), which measures the electronic structure with momentum resolution. Here we report on the use of extremely low-energy ARPES (photon energy ~ 7 eV) to increase depth sensitivity and access buried QW states, located at 3 nm and 6 nm below the surface of cubic-GaN/AlN and GaAs/AlGaAs heterostructures, respectively. We find that the QW states in cubic-GaN/AlN can indeed be observed, but not their energy dispersion, because of the high surface roughness. The GaAs/AlGaAs QW states, on the other hand, are buried too deep to be detected by extremely low-energy ARPES. Since the sample surface is much flatter, the ARPES spectra of the GaAs/AlGaAs show distinct features in momentum space, which can be reconducted to the band structure of the topmost surface layer of the QW structure. Our results provide important information about the samples’ properties required to perform extremely low-energy ARPES experiments on electronic states buried in semiconductor heterostructures.</jats:p>

Nonlinear Bicolor Holography Using Plasmonic Metasurfaces

D. Frese, Q. Wei, Y. Wang, M. Cinchetti, L. Huang, T. Zentgraf, ACS Photonics (2021), 8(4), pp. 1013-1019


Selective Etching of (111)B-Oriented AlxGa1−xAs-Layers for Epitaxial Lift-Off

T. Henksmeier, M. Eppinger, B. Reineke, T. Zentgraf, C. Meier, D. Reuter, physica status solidi (a) (2021), 218(3), pp. 2000408

GaAs-(111)-nanostructures exhibiting second harmonic generation are new building blocks in nonlinear optics. Such structures can be fabricated through epitaxial lift-off using selective etching of Al-containing layers and subsequent transfer to glass substrates. Herein, the selective etching of (111)B-oriented AlxGa1−xAs sacrificial layers (10–50 nm thick) with different aluminum concentrations (x = 0.5–1.0) in 10\% hydrofluoric acid is investigated and compared with standard (100)-oriented structures. The thinner the sacrificial layer and the lower the aluminum content, the lower the lateral etch rate. For both orientations, the lateral etch rates are in the same order of magnitude, but some quantitative differences exist. Furthermore, the epitaxial lift-off, the transfer, and the nanopatterning of thin (111)B-oriented GaAs membranes are demonstrated. Atomic force microscopy and high-resolution X-ray diffraction measurements reveal the high structural quality of the transferred GaAs-(111) films.

Influence of Plasmon Resonances and Symmetry Effects on Second Harmonic Generation in WS2–Plasmonic Hybrid Metasurfaces

F. Spreyer, C. Ruppert, P. Georgi, T. Zentgraf, ACS Nano (2021)

A Versatile Metasurface Enabling Superwettability for Self‐Cleaning and Dynamic Color Response

J. Lu, B. Sain, P. Georgi, M. Protte, T. Bartley, T. Zentgraf, Advanced Optical Materials (2021)

Metasurfaces provide applications for a variety of flat elements and devices due to the ability to modulate light with subwavelength structures. The working principle meanwhile gives rise to the crucial problem and challenge to protect the metasurface from dust or clean the unavoidable contaminants during daily usage. Here, taking advantage of the intelligent bioinspired surfaces which exhibit self-cleaning properties, a versatile dielectric metasurface benefiting from the obtained superhydrophilic or quasi-superhydrophobic states is shown. The design is realized by embedding the metasurface inside a large area of wettability supporting structures, which is highly efficient in fabrication, and achieves both optical and wettability functionality at the same time. The superhydrophilic state enables an enhanced optical response with water, while the quasi-superhydrophobic state imparts the fragile antennas an ability to self-clean dust contamination. Furthermore, the metasurface can be easily switched and repeated between these two wettability or functional states by appropriate treatments in a repeatable way, without degrading the optical performance. The proposed design strategy will bring new opportunities to smart metasurfaces with improved optical performance, versatility, and physical stability.

Nonlinear Imaging of Nanoscale Topological Corner States

S.S. Kruk, W. Gao, D. Choi, T. Zentgraf, S. Zhang, Y. Kivshar, Nano Letters (2021), 21(11), pp. 4592–4597

Topological states of light represent counterintuitive optical modes localized at boundaries of finite-size optical structures that originate from the properties of the bulk. Being defined by bulk properties, such boundary states are insensitive to certain types of perturbations, thus naturally enhancing robustness of photonic circuitries. Conventionally, the N-dimensional bulk modes correspond to (N – 1)-dimensional boundary states. The higher-order bulk-boundary correspondence relates N-dimensional bulk to boundary states with dimensionality reduced by more than 1. A special interest lies in miniaturization of such higher-order topological states to the nanoscale. Here, we realize nanoscale topological corner states in metasurfaces with C6-symmetric honeycomb lattices. We directly observe nanoscale topology-empowered edge and corner localizations of light and enhancement of light–matter interactions via a nonlinear imaging technique. Control of light at the nanoscale empowered by topology may facilitate miniaturization and on-chip integration of classical and quantum photonic devices.

Nonlinear metasurface combining telecom-range intersubband transitions in GaN/AlN quantum wells with resonant plasmonic antenna arrays

J. Mundry, F. Spreyer, V. Jmerik, S. Ivanov, T. Zentgraf, M. Betz, Optical Materials Express (2021), 11(7)

We realize and investigate a nonlinear metasurface taking advantage of intersubband transitions in ultranarrow GaN/AlN multi-quantum well heterostructures. Owing to huge band offsets, the structures offer resonant transitions in the telecom window around 1.55 µm. These heterostructures are functionalized with an array of plasmonic antennas featuring cross-polarized resonances at these near-infrared wavelengths and their second harmonic. This kind of nonlinear metasurface allows for substantial second-harmonic generation at normal incidence which is completely absent for an antenna array without the multi-quantum well structure underneath. While the second harmonic is originally radiated only into the plane of the quantum wells, a proper geometrical arrangement of the plasmonic elements permits the redirection of the second-harmonic light to free-space radiation, which is emitted perpendicular to the surface.


Metasurfaces help lasers to mode-lock

B. Sain, T. Zentgraf, Light: Science & Applications (2020), 9, pp. 67

Plasmonic metasurfaces for controlling harmonic generations

T. Zentgraf, S. Chen, G. Li, S. Zhang, in: Nanoantennas and Plasmonics: Modelling, design and fabrication, The Institution of Engineering and Technology, 2020


Polarization-Encrypted Orbital Angular Momentum Multiplexed Metasurface Holography

H. Zhou, B. Sain, Y. Wang, C. Schlickriede, R. Zhao, X. Zhang, Q. Wei, X. Li, L. Huang, T. Zentgraf, ACS Nano (2020), 14(5), pp. 5553–5559


A dielectric metasurface optical chip for the generation of cold atoms

L. Zhu, X. Liu, B. Sain, M. Wang, C. Schlickriede, Y. Tang, J. Deng, K. Li, J. Yang, M. Holynski, S. Zhang, T. Zentgraf, K. Bongs, Y. Lien, G. Li, Science Advances (2020), 6(31)

<jats:p>Compact and robust cold atom sources are increasingly important for quantum research, especially for transferring cutting-edge quantum science into practical applications. In this study, we report on a novel scheme that uses a metasurface optical chip to replace the conventional bulky optical elements used to produce a cold atomic ensemble with a single incident laser beam, which is split by the metasurface into multiple beams of the desired polarization states. Atom numbers ~10<jats:sup>7</jats:sup> and temperatures (about 35 μK) of relevance to quantum sensing are achieved in a compact and robust fashion. Our work highlights the substantial progress toward fully integrated cold atom quantum devices by exploiting metasurface optical chips, which may have great potential in quantum sensing, quantum computing, and other areas.</jats:p>

All-dielectric silicon metalens for two-dimensional particle manipulation in optical tweezers

T. Chantakit, C. Schlickriede, B. Sain, F. Meyer, T. Weiss, N. Chattham, T. Zentgraf, Photonics Research (2020), 8(9), pp. 1435-1440


Nonlinear imaging with all-dielectric metasurfaces

C. Schlickriede, S.S. Kruk, L. Wang, B. Sain, Y. Kivshar, T. Zentgraf, Nano Letters (2020), 20(6), pp. 4370–4376


All-optical switching of a dye-doped liquid crystal plasmonic metasurface

B. Atorf, H. Mühlenbernd, T. Zentgraf, H. Kitzerow, Optics Express (2020), 28(6), pp. 8898-8908


Nonlinear Wavefront Control by Geometric-Phase Dielectric Metasurfaces: Influence of Mode Field and Rotational Symmetry

B. Liu, B. Sain, B. Reineke, R. Zhao, C. Meier, L. Huang, Y. Jiang, T. Zentgraf, Advanced Optical Materials (2020), 8(9)

Nonlinear Pancharatnam–Berry phase metasurfaces facilitate the nontrivial phase modulation for frequency conversion processes by leveraging photon‐spin dependent nonlinear geometric‐phases. However, plasmonic metasurfaces show some severe limitation for nonlinear frequency conversion due to the intrinsic high ohmic loss and low damage threshold of plasmonic nanostructures. Here, the nonlinear geometric‐phases associated with the third‐harmonic generation process occurring in all‐dielectric metasurfaces is studied systematically, which are composed of silicon nanofins with different in‐plane rotational symmetries. It is found that the wave coupling among different field components of the resonant fundamental field gives rise to the appearance of different nonlinear geometric‐phases of the generated third‐harmonic signals. The experimental observations of the nonlinear beam steering and nonlinear holography realized in this work by all‐dielectric geometric‐phase metasurfaces are well explained with the developed theory. This work offers a new physical picture to understand the nonlinear optical process occurring at nanoscale dielectric resonators and will help in the design of nonlinear metasurfaces with tailored phase properties.

Second harmonic imaging of plasmonic Pancharatnam-Berry phase metasurfaces coupled to monolayers of WS2

F. Spreyer, R. Zhao, L. Huang, T. Zentgraf, Nanophotonics (2020), 9(2), pp. 351–360

<jats:p>The nonlinear processes of frequency conversion such as second harmonic generation (SHG) usually obey certain selection rules, resulting from the preservation of different kinds of physical quantities, e.g. the angular momentum. For the SHG created by a monolayer of transition-metal dichalcogenides (TMDCs) such as WS<jats:sub>2</jats:sub>, the valley-exciton locked selection rule predicts an SHG signal in the cross-polarization state. By combining plasmonic nanostructures with a monolayer of TMDC, a hybrid metasurface is realized, which affects this nonlinear process because of an additional polarization conversion process. Here, we observe that the plasmonic metasurface modifies the light-matter interaction with the TMDC, resulting in an SHG signal that is co-polarized with respect to the incident field, which is usually forbidden for the monolayers of TMDC. We fabricate such hybrid metasurfaces by placing plasmonic nanorods on top of a monolayer WS<jats:sub>2</jats:sub> and study the valley-exciton locked SHG emission from such system for different parameters, such as wavelength and polarization. Furthermore, we show the potential of the hybrid metasurface for tailoring nonlinear processes by adding additional phase information to the SHG signal using the Pancharatnam-Berry phase effect. This allows direct tailoring of the SHG emission to the far-field.</jats:p>


Metasurface interferometry toward quantum sensors

P. Georgi, M. Massaro, K.H. Luo, B. Sain, N. Montaut, H. Herrmann, T. Weiss, G. Li, C. Silberhorn, T. Zentgraf, Light: Science & Applications (2019), 8, pp. 70


Reconfigurable metasurface hologram by utilizing addressable dynamic pixels

T. Li, Q. Wei, B. Reineke, F. Walter, Y. Wang, T. Zentgraf, L. Huang, Optics Express (2019), 27(15), pp. 21153-21162


Dynamic control of mode modulation and spatial multiplexing using hybrid metasurfaces

Z. Lin, L. Huang, R. Zhao, Q. Wei, T. Zentgraf, Y. Wang, X. Li, Optics Express (2019), 27(13), pp. 18740-18750

Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review

B. Sain, C. Meier, T. Zentgraf, Advanced Photonics (2019), 1(2), pp. 024002

Free from phase-matching constraints, plasmonic metasurfaces have contributed significantly to the control of optical nonlinearity and enhancement of nonlinear generation efficiency by engineering subwavelength meta-atoms. However, high dissipative losses and inevitable thermal heating limit their applicability in nonlinear nanophotonics. All-dielectric metasurfaces, supporting both electric and magnetic Mie-type resonances in their nanostructures, have appeared as a promising alternative to nonlinear plasmonics. High-index dielectric nanostructures, allowing additional magnetic resonances, can induce magnetic nonlinear effects, which, along with electric nonlinearities, increase the nonlinear conversion efficiency. In addition, low dissipative losses and high damage thresholds provide an extra degree of freedom for operating at high pump intensities, resulting in a considerable enhancement of the nonlinear processes. We discuss the current state of the art in the intensely developing area of all-dielectric nonlinear nanostructures and metasurfaces, including the role of Mie modes, Fano resonances, and anapole moments for harmonic generation, wave mixing, and ultrafast optical switching. Furthermore, we review the recent progress in the nonlinear phase and wavefront control using all-dielectric metasurfaces. We discuss techniques to realize all-dielectric metasurfaces for multifunctional applications and generation of second-order nonlinear processes from complementary metal–oxide–semiconductor-compatible materials.

Miniaturized Metalens Based Optical Tweezers on Liquid Crystal Droplets for Lab-on-a-Chip Optical Motors

S. Suwannasopon, F. Meyer, C. Schlickriede, P. Chaisakul, J. T-Thienprasert, J. Limtrakul, T. Zentgraf, N. Chattham, Crystals (2019), 9(10), pp. 515

<jats:p>Surfaces covered with layers of ultrathin nanoantenna structures—so called metasurfaces have recently been proven capable of completely controlling phase of light. Metalenses have emerged from the advance in the development of metasurfaces providing a new basis for recasting traditional lenses into thin, planar optical components capable of focusing light. The lens made of arrays of plasmonic gold nanorods were fabricated on a glass substrate by using electron beam lithography. A 1064 nm laser was used to create a high intensity circularly polarized light focal spot through metalens of focal length 800 µm, N.A. = 0.6 fabricated based on Pancharatnam-Berry phase principle. We demonstrated that optical rotation of birefringent nematic liquid crystal droplets trapped in the laser beam was possible through this metalens. The rotation of birefringent droplets convinced that the optical trap possesses strong enough angular momentum of light from radiation of each nanostructure acting like a local half waveplate and introducing an orientation-dependent phase to light. Here, we show the success in creating a miniaturized and robust metalens based optical tweezers system capable of rotating liquid crystals droplets to imitate an optical motor for future lab-on-a-chip applications.</jats:p>

Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography

B. Reineke, B. Sain, R. Zhao, L. Carletti, B. Liu, L. Huang, C. de Angelis, T. Zentgraf, Nano Letters (2019), 19(9), pp. 6585–6591


Four‐Wave Mixing Holographic Multiplexing Based on Nonlinear Metasurfaces

Z. Lin, L. Huang, Z.T. Xu, X. Li, T. Zentgraf, Y. Wang, Advanced Optical Materials (2019), 7(21), pp. 1900782


Simultaneous Spectral and Spatial Modulation for Color Printing and Holography Using All-dielectric Metasurfaces

Q. Wei, B. Sain, Y. Wang, B. Reineke, X. Li, L. Huang, T. Zentgraf, Nano Letters (2019), 19(12), pp. 8964–8971


Strong nonlinear optical response from ZnO by coupled and lattice-matched nanoantennas

M. Protte, N. Weber, C. Golla, T. Zentgraf, C. Meier, Journal of Applied Physics (2019), 125


Strong Nonlinear Optical Activity Induced by Lattice Surface Modes on Plasmonic Metasurface

S. Chen, B. Reineke, G. Li, T. Zentgraf, S. Zhang, Nano Letters (2019), 19(9), pp. 6278-6283


Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces

D. Frese, Q. Wei, Y. Wang, L. Huang, T. Zentgraf, Nano Letters (2019), 19(6), pp. 3976-3980

As flexible optical devices that can manipulate the phase and amplitude of light, metasurfaces would clearly benefit from directional optical properties. However, single layer metasurface systems consisting of two-dimensional nanoparticle arrays exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly symmetric transmission features. Here, we present a metasurface design principle for nonreciprocal polarization encryption of holographic images. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and generates a bidirectional functionality with full phase and amplitude control of the transmitted light. The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction. Hence, layered metasurface systems can feature asymmetric transmission with full phase and amplitude control and therefore expand the design freedom in nanoscale optical devices toward asymmetric information processing and security features for anticounterfeiting applications.

Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces.

D. Frese, Q. Wei, Y. Wang, L. Huang, T. Zentgraf, Nano Lett (2019), 19(6), pp. 3976-3980

As flexible optical devices that can manipulate the phase and amplitude of light, metasurfaces would clearly benefit from directional optical properties. However, single layer metasurface systems consisting of two-dimensional nanoparticle arrays exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly symmetric transmission features. Here, we present a metasurface design principle for nonreciprocal polarization encryption of holographic images. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and generates a bidirectional functionality with full phase and amplitude control of the transmitted light. The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction. Hence, layered metasurface systems can feature asymmetric transmission with full phase and amplitude control and therefore expand the design freedom in nanoscale optical devices toward asymmetric information processing and security features for anticounterfeiting applications.


Imaging through Nonlinear Metalens Using Second Harmonic Generation

C. Schlickriede, N. Waterman, B. Reineke, P. Georgi, G. Li, S. Zhang, T. Zentgraf, Advanced Materials (2018), 30(8)


Spin and Geometric Phase Control Four-Wave Mixing from Metasurfaces

G. Li, G. Sartorello, S. Chen, L.H. Nicholls, K.F. Li, T. Zentgraf, S. Zhang, A.V. Zayats, Laser & Photonics Reviews (2018), 12(6)


Multichannel vectorial holographic display and encryption

R. Zhao, B. Sain, Q. Wei, C. Tang, X. Li, T. Weiss, L. Huang, Y. Wang, T. Zentgraf, Light: Science & Applications (2018), 7(1)


Selective Diffraction with Complex Amplitude Modulation by Dielectric Metasurfaces

X. Song, L. Huang, C. Tang, J. Li, X. Li, J. Liu, Y. Wang, T. Zentgraf, Advanced Optical Materials (2018), 6(4)


Editorial for the theories and applications of metasurfaces

Z. Guo, X. Chen, T. Zentgraf, Journal of Physics D: Applied Physics (2018), 51(15)


Nonlinear Quasi-Phase Matching with metasurfaces

S. Heron, B. Reineke, S. Vezian, T. Zentgraf, B. Damilano, P. Genevet, in: 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials), IEEE, 2018


Tailored UV Emission by Nonlinear IR Excitation from ZnO Photonic Crystal Nanocavities

S.P. Hoffmann, M. Albert, N. Weber, D. Sievers, J. Förstner, T. Zentgraf, C. Meier, ACS Photonics (2018), 5, pp. 1933-1942

Switchable Plasmonic Holograms Utilizing the Electro-Optic Effect of a Liquid-Crystal Circular Polarizer

B. Atorf, H. Rasouli, H. Mühlenbernd, B.J. Reineke, T. Zentgraf, H. Kitzerow, The Journal of Physical Chemistry C (2018), 122(8), pp. 4600-4606


Controlling the phase of optical nonlinearity with plasmonic metasurfaces

S. Chen, G. Li, K.W. Cheah, T. Zentgraf, S. Zhang, Nanophotonics (2018), 7(6), pp. 1013-1024


Efficient frequency conversion by combined photonic–plasmonic mode coupling

N. Weber, S.P. Hoffmann, M. Albert, T. Zentgraf, C. Meier, Journal of Applied Physics (2018), 123(10)


Nanoscale Polarization Manipulation and Encryption Based on Dielectric Metasurfaces

R. Zhao, L. Huang, C. Tang, J. Li, X. Li, Y. Wang, T. Zentgraf, Advanced Optical Materials (2018)


Near-field plasmonic beam engineering by complex amplitude modulation based on metasurface (Conference Presentation)

L. Sun, X. Zhang, R. Zhao, X. Li, J. Wang, B. Bai, Y. Wang, T. Zentgraf, L. Huang, X. Song, in: Nanophotonics VII, SPIE, 2018


Metasurface holography: from fundamentals to applications

L. Huang, S. Zhang, T. Zentgraf, Nanophotonics (2018), 7(6), pp. 1169-1190

Imaging the rainbow

T. Zentgraf, Nature Nanotechnology (2018), 13(3), pp. 179-180


Third Harmonic Generation Enhanced by Multipolar Interference in Complementary Silicon Metasurfaces

S. Chen, M. Rahmani, K.F. Li, A. Miroshnichenko, T. Zentgraf, G. Li, D. Neshev, S. Zhang, ACS Photonics (2018), 5(5), pp. 1671-1675


Switchable Plasmonic Metasurface Utilizing the Electro-Optic Kerr Effect of a Blue Phase Liquid Crystal

B. Atorf, S. Friesen, R. Rennerich, H. Mühlenbernd, T. Zentgraf, H. Kitzerow, Polymer Science, Series C (2018), 60, pp. 55-62



Beam switching and bifocal zoom lensing using active plasmonic metasurfaces

X. Yin, T. Steinle, L. Huang, T. Taubner, M. Wuttig, T. Zentgraf, H. Giessen, Light: Science & Applications (2017), 6(7)


Manipulation of vector beam polarization with geometric metasurfaces

Q. Guo, C. Schlickriede, D. Wang, H. Liu, Y. Xiang, T. Zentgraf, S. Zhang, Optics Express (2017), 25(13)


Volumetric Generation of Optical Vortices with Metasurfaces

L. Huang, X. Song, B. Reineke, T. Li, X. Li, J. Liu, S. Zhang, Y. Wang, T. Zentgraf, ACS Photonics (2017), pp. 338-346


Double resonant plasmonic nanoantennas for efficient second harmonic generation in zinc oxide

N. Weber, M. Protte, F. Walter, P. Georgi, T. Zentgraf, C. Meier, Physical Review B (2017), 95(20)


Nonlinear Metasurface for Simultaneous Control of Spin and Orbital Angular Momentum in Second Harmonic Generation

G. Li, L. Wu, K.F. Li, S. Chen, C. Schlickriede, Z. Xu, S. Huang, W. Li, Y. Liu, E.Y.B. Pun, T. Zentgraf, K.W. Cheah, Y. Luo, S. Zhang, Nano Letters (2017), 17(12), pp. 7974-7979


Nonlinear photonic metasurfaces

G. Li, S. Zhang, T. Zentgraf, Nature Reviews Materials (2017), 2(5)


Single-pixel computational ghost imaging with helicity-dependent metasurface hologram

H. Liu, B. Yang, Q. Guo, J. Shi, C. Guan, G. Zheng, H. Mühlenbernd, G. Li, T. Zentgraf, S. Zhang, Science Advances (2017), 3(9)


Ultrathin Nonlinear Metasurface for Optical Image Encoding

F. Walter, G. Li, C. Meier, S. Zhang, T. Zentgraf, Nano Letters (2017), 17(5), pp. 3171-3175


Optimisation of stability and charge transferability of ferrocene-encapsulated carbon nanotubes

P. Prajongtat, S. Sriyab, T. Zentgraf, S. Hannongbua, Molecular Physics (2017), 116(1), pp. 9-18


Rotational Doppler shift induced by spin-orbit coupling of light at spinning metasurfaces

P. Georgi, C. Schlickriede, G. Li, S. Zhang, T. Zentgraf, Optica (2017), 4(8)


Directional Emission from Dielectric Leaky-Wave Nanoantennas

M. Peter, A. Hildebrandt, C. Schlickriede, K. Gharib, T. Zentgraf, J. Förstner, S. Linden, Nano Letters (2017), 17(7), pp. 4178-4183


Rotational Doppler effect in nonlinear optics

G. Li, T. Zentgraf, S. Zhang, Nature Physics (2016), 12(8), pp. 736-740


Designermaterialien für nichtlineare Optik

H. Probst, T. Zentgraf, Physik in unserer Zeit (2016), 47(2), pp. 84-89


Helicity-Preserving Omnidirectional Plasmonic Mirror

S. Xiao, H. Mühlenbernd, G. Li, M. Kenney, F. Liu, T. Zentgraf, S. Zhang, J. Li, Advanced Optical Materials (2016), 4(5), pp. 654-658


Giant Nonlinear Optical Activity of Achiral Origin in Planar Metasurfaces with Quadratic and Cubic Nonlinearities

S. Chen, F. Zeuner, M. Weismann, B. Reineke, G. Li, V.K. Valev, K.W. Cheah, N.C. Panoiu, T. Zentgraf, S. Zhang, Advanced Materials (2016), 28(15), pp. 2992-2999


Simulations of high harmonic generation from plasmonic nanoparticles in the terahertz region

Y. Grynko, T. Zentgraf, T. Meier, J. Förstner, Applied Physics B (2016), 122(9), pp. 242


Doppler-Effekt für rotierende Objekte

T. Zentgraf, Physik in unserer Zeit (2016), 47(4), pp. 163-164


Spin and wavelength multiplexed nonlinear metasurface holography

W. Ye, F. Zeuner, X. Li, B. Reineke, S. He, C. Qiu, J. Liu, Y. Wang, S. Zhang, T. Zentgraf, Nature Communications (2016), 7



Metasurface holograms reaching 80% efficiency

G. Zheng, H. Mühlenbernd, M. Kenney, G. Li, T. Zentgraf, S. Zhang, Nature Nanotechnology (2015), 10(4), pp. 308-312


Coupling Mediated Coherent Control of Localized Surface Plasmon Polaritons

F. Zeuner, M. Muldarisnur, A. Hildebrandt, J. Förstner, T. Zentgraf, Nano Letters (2015), 15(6), pp. 4189-4193

Broadband Hybrid Holographic Multiplexing with Geometric Metasurfaces

L. Huang, H. Mühlenbernd, X. Li, X. Song, B. Bai, Y. Wang, T. Zentgraf, Advanced Materials (2015), 27(41), pp. 6444-6449


Amplitude- and Phase-Controlled Surface Plasmon Polariton Excitation with Metasurfaces

H. Mühlenbernd, P. Georgi, N. Pholchai, L. Huang, G. Li, S. Zhang, T. Zentgraf, ACS Photonics (2015), 3(1), pp. 124-129


Continuous control of the nonlinearity phase for harmonic generations

G. Li, S. Chen, N. Pholchai, B. Reineke, P.W.H. Wong, E.B. Pun, K.W. Cheah, T. Zentgraf, S. Zhang, Nature Materials (2015), 14(6), pp. 607-612


Nonlinear optical sub-bandgap excitation of ZnO-based photonic resonators

C.A. Bader, F. Zeuner, M.H.W. Bader, T. Zentgraf, C. Meier, Journal of Applied Physics (2015), 118(21)



Effect of Alignment on a Liquid Crystal/Split-Ring Resonator Metasurface

B. Atorf, H. Mühlenbernd, M. Muldarisnur, T. Zentgraf, H. Kitzerow, ChemPhysChem (2014), 15(7), pp. 1470-1476


Symmetry-Selective Third-Harmonic Generation from Plasmonic Metacrystals

S. Chen, G. Li, F. Zeuner, W.H. Wong, E.Y.B. Pun, T. Zentgraf, K.W. Cheah, S. Zhang, Physical Review Letters (2014), 113(3)


Manipulating wave propagation with geometric metasurfaces: fundamentals and applications

L. Huang, X. Chen, B. Bai, Q. Tan, G. Jin, T. Zentgraf, S. Zhang, in: Plasmonics, SPIE, 2014


Hochauflösende Holografie

T. Zentgraf, Physik in unserer Zeit (2014), 45(2), pp. 58-59


Electro-optic tuning of split ring resonators embedded in a liquid crystal

B. Atorf, H. Mühlenbernd, M. Muldarisnur, T. Zentgraf, H. Kitzerow, Optics Letters (2014), 39(5)


Ag‐nanoparticles in PA-templates

A. Ezhova, J. Lindner, M. Muldarisnur, T. Zentgraf, K. Huber, 2014


Blue-green emitting microdisks using low-temperature-grown ZnO on patterned silicon substrates

M. Ruth, T. Zentgraf, C. Meier, Optics Express (2013), 21(21)


Interference-induced asymmetric transmission through a monolayer of anisotropic chiral metamolecules

S. Zhang, F. Liu, T. Zentgraf, J. Li, Physical Review A (2013), 88(2)


Three-dimensional optical holography using a plasmonic metasurface

L. Huang, X. Chen, H. Mühlenbernd, H. Zhang, S. Chen, B. Bai, Q. Tan, G. Jin, K. Cheah, C. Qiu, J. Li, T. Zentgraf, S. Zhang, Nature Communications (2013), 4


Reversible Three-Dimensional Focusing of Visible Light with Ultrathin Plasmonic Flat Lens

X. Chen, L. Huang, H. Mühlenbernd, G. Li, B. Bai, Q. Tan, G. Jin, C. Qiu, T. Zentgraf, S. Zhang, Advanced Optical Materials (2013), 1(7), pp. 517-521


Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity

L. Huang, X. Chen, B. Bai, Q. Tan, G. Jin, T. Zentgraf, S. Zhang, Light: Science & Applications (2013), 2(3), pp. e70-e70


Metalens with convex and concave functionality

S. Zhang, X. Chen, L. Huang, B. Bai, Q. Tan, G. Jin, H. Mühlenbernd, T. Zentgraf, G. Li, C. Qiu, SPIE Newsroom (2013)



Mapping the near-field dynamics in plasmon-induced transparency

Z. Ye, S. Zhang, Y. Wang, Y. Park, T. Zentgraf, G. Bartal, X. Yin, X. Zhang, Physical Review B (2012), 86(15)


Compact Magnetic Antennas for Directional Excitation of Surface Plasmons

Y. Liu, S. Palomba, Y. Park, T. Zentgraf, X. Yin, X. Zhang, Nano Letters (2012), 12(9), pp. 4853-4858


Dual-polarity plasmonic metalens for visible light

X. Chen, L. Huang, H. Mühlenbernd, G. Li, B. Bai, Q. Tan, G. Jin, C. Qiu, S. Zhang, T. Zentgraf, Nature Communications (2012), 3

Control of plasmon dynamics in coupled plasmonic hybrid mode microcavities

N.D. Lanzillotti-Kimura, T. Zentgraf, X. Zhang, Physical Review B (2012), 86(4)


Slow-light dispersion by transparent waveguide plasmon polaritons

A. Ishikawa, R.F. Oulton, T. Zentgraf, X. Zhang, Physical Review B (2012), 85(15)


Dispersionless Phase Discontinuities for Controlling Light Propagation

L. Huang, X. Chen, H. Mühlenbernd, G. Li, B. Bai, Q. Tan, G. Jin, T. Zentgraf, S. Zhang, Nano Letters (2012), 12(11), pp. 5750-5755



A Carpet Cloak for Visible Light

M. Gharghi, C. Gladden, T. Zentgraf, Y. Liu, X. Yin, J. Valentine, X. Zhang, Nano Letters (2011), 11(7), pp. 2825-2828


A graphene-based broadband optical modulator

M. Liu, X. Yin, E. Ulin-Avila, B. Geng, T. Zentgraf, L. Ju, F. Wang, X. Zhang, Nature (2011), 474(7349), pp. 64-67


Towards the Origin of the Nonlinear Response in Hybrid Plasmonic Systems

T. Utikal, T. Zentgraf, T. Paul, C. Rockstuhl, F. Lederer, M. Lippitz, H. Giessen, Physical Review Letters (2011), 106(13)


Development of Bulk Optical Negative Index Fishnet Metamaterials: Achieving a Low-Loss and Broadband Response Through Coupling

J. Valentine, S. Zhang, T. Zentgraf, X. Zhang, Proceedings of the IEEE (2011), 99(10), pp. 1682-1690


Tailoring the photonic band splitting in metallodielectric photonic crystal superlattices

T. Utikal, T. Zentgraf, S.G. Tikhodeev, M. Lippitz, H. Giessen, Physical Review B (2011), 84(7)


Plasmonic Luneburg and Eaton lenses

T. Zentgraf, Y. Liu, M.H. Mikkelsen, J. Valentine, X. Zhang, Nature Nanotechnology (2011), 6(3), pp. 151-155



Transformational Plasmon Optics

Y. Liu, T. Zentgraf, G. Bartal, X. Zhang, Nano Letters (2010), 10(6), pp. 1991-1997


An Optical “Janus” Device for Integrated Photonics

T. Zentgraf, J. Valentine, N. Tapia, J. Li, X. Zhang, Advanced Materials (2010), 22(23), pp. 2561-2564


All-Liquid Photonic Microcavity Stabilized by Quantum Dots

T. Yim, T. Zentgraf, B. Min, X. Zhang, Journal of the American Chemical Society (2010), 132(7), pp. 2154-2156


Far-field measurement of ultra-small plasmonic mode volume

S. Zhang, Y. Park, Y. Liu, T. Zentgraf, X. Zhang, Optics Express (2010), 18(6)


Extremely low-loss slow-light modes in plasmonic dielectric hybrid systems

A. Ishikawa, R.F. Oulton, T. Zentgraf, X. Zhang, in: Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, SPIE, 2010


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