首页|Electrically tunable third-harmonic generation using intersubband polaritonic metasurfaces

Electrically tunable third-harmonic generation using intersubband polaritonic metasurfaces

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Nonlinear intersubband polaritonic metasurfaces,which integrate giant nonlinear responses derived from intersubband transitions of multiple quantum wells(MQWs)with plasmonic nanoresonators,not only facilitate efficient frequency conversion at pump intensities on the order of few tens of kW cm-2 but also enable electrical modulation of nonlinear responses at the individual meta-atom level and dynamic beam manipulation.The electrical modulation characteristics of the magnitude and phase of the nonlinear optical response are realized through Stark tuning of the resonant intersubband nonlinearity.In this study,we report,for the first time,experimental implementations of electrical modulation characteristics of mid-infrared third-harmonic generation(THG)using an intersubband polaritonic metasurface based on MQW with electrically tunable third-order nonlinear response.Experimentally,we achieved a 450％modulation depth of the THG signal,86％suppression of zero-order THG diffraction tuning based on local phase tuning exceeding 180 degrees,and THG beam steering using phase gradients.Our work proposes a new route for electrically tunable flat nonlinear optical elements with versatile functionalities.

Seongjin Park、Jaeyeon Yu、Gerhard Boehm、Mikhail A.Belkin、Jongwon Lee

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Department of Electrical Engineering,Ulsan National Institute of Science and Technology(UNIST),Ulsan,Republic of Korea

Walter Schottky Institute,Technical University of Munich,Garching,Germany

Institute of Information & Communications Technology Planning & Evaluation(IITP)grant funded by the Korea government(MSIT)National Research Foundation of Korea(NRF)National Research Foundation of Korea(NRF)German Research Foundation(Deutsche Forschungsgemeinschaft)

RS-2023-002596762022R1A2C3011898122022M3H4A1A04096465506515587

2024

10.1038/s41377-024-01517-y

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(8)