Electro-optically Modulated Nonlinear Metasurfaces.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-11-13 Epub Date: 2024-10-29 DOI:10.1021/acs.nanolett.4c03369

Zhengqing He, Lun Qu, Wei Wu, Jikun Liu, Chunyan Jin, Chenxiong Wang, Jingfei You, Weiye Liu, Lu Bai, Zhidong Gu, Wei Cai, Mengxin Ren, Jingjun Xu

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Abstract

Electrically reconfigurable nonlinear metasurfaces provide dynamic control over nonlinear phenomena such as second-harmonic generation (SHG), unlocking novel applications in signal processing, light switching, and sensing. Previous methods, like electric-field-induced SHG in plasmonic metasurfaces and Stark-tuned nonlinearities in quantum well metasurfaces, face limitations due to weak SHG responses from metals and mid-infrared constraints of quantum wells, respectively. Addressing the need for efficient SHG control in the visible and near-infrared ranges, we present a novel approach using the electro-optic (EO) effect to modulate SHG. By leveraging the exceptional EO and SHG properties of lithium niobate (LN), we integrate the EO effect with SHG within a metasurface framework for the first time. Our LN metasurface achieves an 11.3% modulation depth in SHG amplitude under a ±50 V alternating voltage. These results open new avenues for reconfigurable photonic applications. including tunable nonlinear light sources, quantum optics, and nonlinear information processing.

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电光调制非线性元表面。

电气可重构非线性元表面可对二次谐波发生（SHG）等非线性现象进行动态控制，从而开启信号处理、光开关和传感领域的新应用。以往的方法，如等离子体元表面中的电场诱导 SHG 和量子阱元表面中的斯塔克调谐非线性，分别由于金属的微弱 SHG 响应和量子阱的中红外限制而受到限制。为了满足在可见光和近红外范围内有效控制 SHG 的需求，我们提出了一种利用电光（EO）效应调制 SHG 的新方法。通过利用铌酸锂（LN）优异的 EO 和 SHG 特性，我们首次在元表面框架内将 EO 效应与 SHG 相结合。在 ±50 V 交流电压下，我们的铌酸锂元表面实现了 11.3% 的 SHG 振幅调制深度。这些成果为可重构光子应用开辟了新途径，包括可调谐非线性光源、量子光学和非线性信息处理。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.