Full complex amplitude control of second-harmonic generation via electrically tunable intersubband polaritonic metasurfaces

IF 11.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Jaeyeon Yu, Jaesung Kim, Hyeongju Chung, Jeongwoo Son, Gerhard Boehm, Mikhail A. Belkin, Jongwon Lee
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Abstract

Nonlinear intersubband polaritonic metasurfaces based on coupling of the intersubband nonlinear optical response of quantum-engineered semiconductor heterostructures and electromagnetic modes of nanoresonators provide efficient frequency mixing with moderate pump intensities. The resonant nonlinear optical response, represented as a complex function, can be modulated via Stark tuning of intersubband transition energies under applied voltages. However, achieving full complex amplitude control (both phase and magnitude) remains challenging. In this work, we present and experimentally validate electrically tunable nonlinear intersubband polaritonic metasurfaces that achieve complete complex amplitude control for second-harmonic generation (SHG). Through a design featuring two in-plane flipped meta-atoms per unit cell, we achieve complete electrical control of both the amplitude and phase of the metasurface second-order nonlinear susceptibility, with a tuning range of 0 to 30 nm V−1 for the magnitude and 0-2π for the phase of the nonlinear optical response. Using these properties, we achieve complete on-off SHG modulation and beam diffraction tuning through electrically controlled amplitude and phase gratings.

Abstract Image

通过电可调谐子带间极化超表面实现二次谐波产生的完全复杂幅度控制
基于量子工程半导体异质结构的子带间非线性光学响应与纳米谐振器的电磁模式耦合的非线性子带间极化超表面提供了适度泵浦强度的有效频率混频。谐振非线性光学响应,表示为复函数,可以通过在外加电压下子带间跃迁能量的Stark调谐来调制。然而,实现完全复杂的幅度控制(相位和幅度)仍然具有挑战性。在这项工作中,我们提出并实验验证了电可调谐非线性子带间极化超表面,该超表面实现了二次谐波产生(SHG)的完全复杂幅度控制。通过每单元电池两个平面内翻转元原子的设计,我们实现了对超表面二阶非线性磁化率的幅度和相位的完全电气控制,非线性光学响应的幅度和相位的调谐范围分别为0到30 nm V−1和0-2π。利用这些特性,我们通过控制振幅和相位光栅实现了完全的开关SHG调制和光束衍射调谐。
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来源期刊
Science Advances
Science Advances 综合性期刊-综合性期刊
CiteScore
21.40
自引率
1.50%
发文量
1937
审稿时长
29 weeks
期刊介绍: Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.
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