@article{45596, abstract = {{Dielectric metasurfaces provide a unique platform for efficient harmonic generation and optical wavefront manipulation at the nanoscale. Tailoring phase and amplitude of a nonlinearly generated wave with a high emission efficiency using resonance-based metasurfaces is a challenging task that often requires state-of-the-art numerical methods. Here, we propose a simple yet effective approach combining a sampling method with a Monte Carlo approach to design the third-harmonic wavefront generated by all-dielectric metasurfaces composed of elliptical silicon nanodisks. Using this approach, we theoretically demonstrate the full nonlinear 2π phase control with a uniform and highest possible amplitude in the considered parameter space, allowing us to design metasurfaces operating as third harmonic beam deflectors capable of steering light into a desired direction with high emission efficiency. The TH beam deflection with a record calculated average conversion efficiency of 1.2 × 10–1 W–2 is achieved. We anticipate that the proposed approach will be widely applied as alternative to commonly used optimization algorithms with higher complexity and implementation effort for the design of metasurfaces with other holographic functionalities.}}, author = {{Hähnel, David and Förstner, Jens and Myroshnychenko, Viktor}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{tet_topic_meta}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Efficient Modeling and Tailoring of Nonlinear Wavefronts in Dielectric Metasurfaces}}}, doi = {{10.1021/acsphotonics.2c01967}}, year = {{2023}}, } @article{49607, abstract = {{In this work, we utilize thin dielectric meta-atoms placed on a silver substrate to efficiently enhance and manipulate the third-harmonic generation. We theoretically and experimentally reveal that when the structural symmetry of the meta-atom is incompatible with the lattice symmetry of an array, some generalized nonlinear geometric phases appear, which offers new possibilities for harmonic generation control beyond the accessible symmetries governed by the selection rule. The underlying mechanism is attributed to the modified rotation of the effective principal axis of a dense meta-atom array, where the strong coupling among the units gives rise to a generalized linear geometric phase modulation of the pump light. Therefore, nonlinear geometric phases carried by third-harmonic emissions are the natural result of the wave-mixing process among the modes excited at the fundamental frequency. This mechanism further points out a new strategy to predict the nonlinear geometric phases delivered by the nanostructures according to their linear responses. Our design is simple and efficient and offers alternatives for the nonlinear meta-devices that are capable of flexible photon generation and manipulation.}}, author = {{Liu, Bingyi and Geromel, René and Su, Zhaoxian and Guo, Kai and Wang, Yongtian and Guo, Zhongyi and Huang, Lingling and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design}}}, doi = {{10.1021/acsphotonics.3c01163}}, year = {{2023}}, } @article{30195, abstract = {{While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often, symmetry effects are utilized to obtain particular optical responses. By breaking certain spatial symmetries, chiral structures arise and provide robust chiroptical responses to these plasmonic resonances. Here, we observe strong chiroptical responses in the linear and nonlinear optical regime for chiral L-handed helicoid-III nanoparticles and quantify them by means of an asymmetric factor, the so-called g-factor. We calculate the linear optical g-factors for two distinct chiroptical resonances to −0.12 and –0.43 and the nonlinear optical g-factors to −1.45 and −1.63. The results demonstrate that the chirality of the helicoid-III nanoparticles is strongly enhanced in the nonlinear regime.}}, author = {{Spreyer, Florian and Mun, Jungho and Kim, Hyeohn and Kim, Ryeong Myeong and Nam, Ki Tae and Rho, Junsuk and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials}}, number = {{3}}, pages = {{784–792}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles}}}, doi = {{10.1021/acsphotonics.1c00882}}, volume = {{9}}, year = {{2022}}, } @article{31937, author = {{Li, Yao and Ma, Xuekai and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Gao, Tingge}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, number = {{6}}, pages = {{2079--2086}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Switching Off a Microcavity Polariton Condensate near the Exceptional Point}}}, doi = {{10.1021/acsphotonics.2c00288}}, volume = {{9}}, year = {{2022}}, } @article{21475, author = {{Frese, Daniel and Wei, Qunshuo and Wang, Yongtian and Cinchetti, Mirko and Huang, Lingling and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, number = {{4}}, pages = {{1013--1019}}, title = {{{Nonlinear Bicolor Holography Using Plasmonic Metasurfaces}}}, doi = {{10.1021/acsphotonics.1c00028}}, volume = {{8}}, year = {{2021}}, } @article{21360, author = {{Luk, Samuel M. H. and Vergnet, Hadrien and Lafont, Ombline and Lewandowski, Przemyslaw and Kwong, Nai H. and Galopin, Elisabeth and Lemaitre, Aristide and Roussignol, Philippe and Tignon, Jérôme and Schumacher, Stefan and Binder, Rolf and Baudin, Emmanuel}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, pages = {{449--454}}, title = {{{All-Optical Beam Steering Using the Polariton Lighthouse Effect}}}, doi = {{10.1021/acsphotonics.0c01962}}, year = {{2021}}, } @article{4342, author = {{Chen, Shumei and Rahmani, Mohsen and Li, King Fai and Miroshnichenko, Andrey and Zentgraf, Thomas and Li, Guixin and Neshev, Dragomir and Zhang, Shuang}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, number = {{5}}, pages = {{1671--1675}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Third Harmonic Generation Enhanced by Multipolar Interference in Complementary Silicon Metasurfaces}}}, doi = {{10.1021/acsphotonics.7b01423}}, volume = {{5}}, year = {{2018}}, } @article{1430, author = {{Hoffmann, Sandro P. and Albert, Maximilian and Weber, Nils and Sievers, Denis and Förstner, Jens and Zentgraf, Thomas and Meier, Cedrik}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{tet_topic_phc}}, pages = {{1933--1942}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Tailored UV Emission by Nonlinear IR Excitation from ZnO Photonic Crystal Nanocavities}}}, doi = {{10.1021/acsphotonics.7b01228}}, volume = {{5}}, year = {{2018}}, } @article{9514, author = {{Huang, Lingling and Song, Xu and Reineke, Bernhard and Li, Tianyou and Li, Xiaowei and Liu, Juan and Zhang, Shuang and Wang, Yongtian and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, pages = {{338--346}}, title = {{{Volumetric Generation of Optical Vortices with Metasurfaces}}}, doi = {{10.1021/acsphotonics.6b00808}}, year = {{2017}}, } @article{1461, author = {{Mühlenbernd, Holger and Georgi, Philip and Pholchai, Nitipat and Huang, Lingling and Li, Guixin and Zhang, Shuang and Zentgraf, Thomas}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, number = {{1}}, pages = {{124--129}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Amplitude- and Phase-Controlled Surface Plasmon Polariton Excitation with Metasurfaces}}}, doi = {{10.1021/acsphotonics.5b00536}}, volume = {{3}}, year = {{2015}}, } @article{4335, abstract = {{We explore the impact of ∼500 MHz surface acoustic waves traveling across a commensurable plasmonic grating coupler. A stroboscopic technique involving surface acoustic waves synchronized to a modelocked optical source allows to time-resolve the dynamical impact of the electromechanically induced perturbation. The surface acoustic wave periodically enhances or decreases the surface ripple of the static grating. Most remarkably, the dynamic surface deformation deliberately modulates the coupler’s efficiency by ±2% during the ∼2 ns acoustic cycle.}}, author = {{Ruppert, Claudia and Förster, Frederike and Zrenner, Artur and Kinzel, Jörg B. and Wixforth, Achim and Krenner, Hubert J. and Betz, Markus}}, issn = {{2330-4022}}, journal = {{ACS Photonics}}, keywords = {{nanomechanics, plasmonics, surface acoustic waves, surface plasmon polaritons}}, number = {{2}}, pages = {{91--95}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Radio Frequency Electromechanical Control over a Surface Plasmon Polariton Coupler}}}, doi = {{10.1021/ph400022u}}, volume = {{1}}, year = {{2014}}, }