Prof. Dr. Thomas Zentgraf

Center for Optoelectronics and Photonics (CeOPP)

Vorsitzender - Professor

Institut für Photonische Quantensysteme (PhoQS)

Mitglied - Professor

Sonderforschungsbereich Transregio 142

Mitglied - Professor - Projektleiter

thomas.zentgraf(at)upb(dot)de

Telefon:

+49 5251 60-5865

Fax:

+49 5251 60-5886

E-Mail:

Büro:

P8.3.03

Web:

Homepage

Besucher:

Pohlweg 47-49
33098 Paderborn

DFG Graduiertenkolleg Micro- and Nanostructures in Optoelectronics and Photonics

Mitglied - Professor - Projektleiter

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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	Postdoc 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

2021

Optical secret sharing with cascaded metasurface holography

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

Nonlinear Bicolor Holography Using Plasmonic Metasurfaces

<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>

https://advances.sciencemag.org/content/7/16/eabf9718

D. Frese, Q. Wei, Y. Wang, M. Cinchetti, L. Huang, T. Zentgraf, ACS Photonics (2021)

Metasurfaces help lasers to mode-lock

2020

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

Plasmonic metasurfaces for controlling harmonic generations

https://www.nature.com/articles/s41377-020-0312-1

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)

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

<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>

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)

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

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.

https://onlinelibrary.wiley.com/doi/full/10.1002/adom.201902050

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

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

<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>

T. Henksmeier, M. Eppinger, B. Reineke, T. Zentgraf, C. Meier, D. Reuter, physica status solidi (a) (2020), n/a(n/a), pp. 2000408

Metasurface interferometry toward quantum sensors

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.

2019

P. Georgi, M. Massaro, K. 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

https://doi.org/10.1364/OE.27.018740

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

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

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.

https://www.spiedigitallibrary.org/journals/Advanced-Photonics/volume-1/issue-02/024002/Nonlinear-optics-in-all-dielectric-nanoantennas-and-metasurfaces--a/10.1117/1.AP.1.2.024002.full

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

Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography

<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>

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

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

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

Imaging through Nonlinear Metalens Using Second Harmonic Generation

2018

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

2018-03 Hoffmann ACS Photonics - Tailored UV Emission by nonlinear IR excitation from ZnO photonic crystal nanocavities.pdf -

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

https://www.degruyter.com/view/journals/nanoph/7/6/article-p1169.xml

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

2017

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

2017-08 Peter - Nano Letters - Directional Emission from Dielectric Leaky-Wave Antennas.pdf -

2016

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

2015

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

2015-04 Zeuner THG Nanoletter.pdf -

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

2014

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

2013

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

2012

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

https://www.nature.com/articles/ncomms2207

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

2011

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

2010

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

Light-driven nanoscale plasmonic motors

M. Liu, T. Zentgraf, Y. Liu, G. Bartal, X. Zhang, Nature Nanotechnology (2010), 5(8), pp. 570-573

Semiconductor plasmon laser

V.J. Sorger, R.F. Oulton, T. Zentgraf, R. Ma, C. Gladden, L. Dai, G. Bartal, X. Zhang, in: Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, SPIE, 2010

An optical cloak made of dielectrics

2009

J. Valentine, J. Li, T. Zentgraf, G. Bartal, X. Zhang, Nature Materials (2009), 8(7), pp. 568-571

Ultranarrow coupling-induced transparency bands in hybrid plasmonic systems

T. Zentgraf, S. Zhang, R.F. Oulton, X. Zhang, Physical Review B (2009), 80(19)

Plasmon lasers at deep subwavelength scale

R.F. Oulton, V.J. Sorger, T. Zentgraf, R. Ma, C. Gladden, L. Dai, G. Bartal, X. Zhang, Nature (2009), 461(7264), pp. 629-632

Transition from thin-film to bulk properties of metamaterials

2008

C. Rockstuhl, T. Paul, F. Lederer, T. Pertsch, T. Zentgraf, T.P. Meyrath, H. Giessen, Physical Review B (2008), 77(3)

Optical resonances of bowtie slot antennas and their geometry and material dependence

H. Guo, T.P. Meyrath, T. Zentgraf, N. Liu, L. Fu, H. Schweizer, H. Giessen, Optics Express (2008), 16(11)

Three-dimensional optical metamaterial with a negative refractive index

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D.A. Genov, G. Bartal, X. Zhang, Nature (2008), 455(7211), pp. 376-379