TY - JOUR AB - 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. AU - Hähnel, David AU - Förstner, Jens AU - Myroshnychenko, Viktor ID - 45596 JF - ACS Photonics KW - tet_topic_meta SN - 2330-4022 TI - Efficient Modeling and Tailoring of Nonlinear Wavefronts in Dielectric Metasurfaces ER - TY - JOUR AB - 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. AU - Liu, Bingyi AU - Geromel, René AU - Su, Zhaoxian AU - Guo, Kai AU - Wang, Yongtian AU - Guo, Zhongyi AU - Huang, Lingling AU - Zentgraf, Thomas ID - 49607 JF - ACS Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Biotechnology KW - Electronic KW - Optical and Magnetic Materials SN - 2330-4022 TI - Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design ER - TY - JOUR AB - 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. AU - Spreyer, Florian AU - Mun, Jungho AU - Kim, Hyeohn AU - Kim, Ryeong Myeong AU - Nam, Ki Tae AU - Rho, Junsuk AU - Zentgraf, Thomas ID - 30195 IS - 3 JF - ACS Photonics KW - Electrical and Electronic Engineering KW - Atomic and Molecular Physics KW - and Optics KW - Biotechnology KW - Electronic KW - Optical and Magnetic Materials SN - 2330-4022 TI - Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles VL - 9 ER - TY - JOUR AU - Li, Yao AU - Ma, Xuekai AU - Hatzopoulos, Zaharias AU - Savvidis, Pavlos G. AU - Schumacher, Stefan AU - Gao, Tingge ID - 31937 IS - 6 JF - ACS Photonics SN - 2330-4022 TI - Switching Off a Microcavity Polariton Condensate near the Exceptional Point VL - 9 ER - TY - JOUR AU - Frese, Daniel AU - Wei, Qunshuo AU - Wang, Yongtian AU - Cinchetti, Mirko AU - Huang, Lingling AU - Zentgraf, Thomas ID - 21475 IS - 4 JF - ACS Photonics SN - 2330-4022 TI - Nonlinear Bicolor Holography Using Plasmonic Metasurfaces VL - 8 ER - TY - JOUR AU - Luk, Samuel M. H. AU - Vergnet, Hadrien AU - Lafont, Ombline AU - Lewandowski, Przemyslaw AU - Kwong, Nai H. AU - Galopin, Elisabeth AU - Lemaitre, Aristide AU - Roussignol, Philippe AU - Tignon, Jérôme AU - Schumacher, Stefan AU - Binder, Rolf AU - Baudin, Emmanuel ID - 21360 JF - ACS Photonics SN - 2330-4022 TI - All-Optical Beam Steering Using the Polariton Lighthouse Effect ER - TY - JOUR AU - Chen, Shumei AU - Rahmani, Mohsen AU - Li, King Fai AU - Miroshnichenko, Andrey AU - Zentgraf, Thomas AU - Li, Guixin AU - Neshev, Dragomir AU - Zhang, Shuang ID - 4342 IS - 5 JF - ACS Photonics SN - 2330-4022 TI - Third Harmonic Generation Enhanced by Multipolar Interference in Complementary Silicon Metasurfaces VL - 5 ER - TY - JOUR AU - Hoffmann, Sandro P. AU - Albert, Maximilian AU - Weber, Nils AU - Sievers, Denis AU - Förstner, Jens AU - Zentgraf, Thomas AU - Meier, Cedrik ID - 1430 JF - ACS Photonics KW - tet_topic_phc SN - 2330-4022 TI - Tailored UV Emission by Nonlinear IR Excitation from ZnO Photonic Crystal Nanocavities VL - 5 ER - TY - JOUR AU - Huang, Lingling AU - Song, Xu AU - Reineke, Bernhard AU - Li, Tianyou AU - Li, Xiaowei AU - Liu, Juan AU - Zhang, Shuang AU - Wang, Yongtian AU - Zentgraf, Thomas ID - 9514 JF - ACS Photonics SN - 2330-4022 TI - Volumetric Generation of Optical Vortices with Metasurfaces ER - TY - JOUR AU - Mühlenbernd, Holger AU - Georgi, Philip AU - Pholchai, Nitipat AU - Huang, Lingling AU - Li, Guixin AU - Zhang, Shuang AU - Zentgraf, Thomas ID - 1461 IS - 1 JF - ACS Photonics SN - 2330-4022 TI - Amplitude- and Phase-Controlled Surface Plasmon Polariton Excitation with Metasurfaces VL - 3 ER - TY - JOUR AB - 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. AU - Ruppert, Claudia AU - Förster, Frederike AU - Zrenner, Artur AU - Kinzel, Jörg B. AU - Wixforth, Achim AU - Krenner, Hubert J. AU - Betz, Markus ID - 4335 IS - 2 JF - ACS Photonics KW - nanomechanics KW - plasmonics KW - surface acoustic waves KW - surface plasmon polaritons SN - 2330-4022 TI - Radio Frequency Electromechanical Control over a Surface Plasmon Polariton Coupler VL - 1 ER -