Enhanced nonlinear optical response in GeSe-based multilayer structure

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2025-03-17 DOI:10.1063/5.0248054

Chunzheng Bai, Wenbin Xiang, Jin Chen, Baohua Zhu, Qihao Sun, Changgui Lv, Bing Gu, Boping Yang, Jiayu Zhang

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Abstract

GeSe, an emerging two-dimensional material, exhibits a significant potential in nonlinear optics. This study explores an effective method to enhance the nonlinear optical properties of GeSe through the utilization of a multilayer film structure. We designed and fabricated a (SiO2/ZnSe/GeSe/ZnSe)4/SiO2 multilayer film structure, which substantially augments the nonlinear optical response of GeSe via electric field enhancement and transmission spectrum edge modulation. Z-scan measurements reveal that the two-photon absorption coefficient and nonlinear refractive index of the multilayer film reach 25.616×104 cm/GW and 8.235×10−13 m2/W, representing more than a fourfold increase compared to a single GeSe film. A further analysis of optical limiting characteristics reveals onset and optical limiting thresholds of 0.043 and 0.711 GW/cm2, respectively. This multilayer film design strategy significantly enhances the nonlinear optical performance of GeSe, offering possibilities for developing high-efficiency optical modulators and optical switches based on two-dimensional materials.

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基于geses的多层结构中增强的非线性光学响应

GeSe是一种新兴的二维材料，在非线性光学中表现出巨大的潜力。本研究探索了一种利用多层薄膜结构增强GeSe非线性光学性能的有效方法。我们设计并制作了（SiO2/ZnSe/GeSe/ZnSe）4/SiO2多层薄膜结构，通过电场增强和透射谱边缘调制大大增强了GeSe的非线性光学响应。z扫描测量表明，多层膜的双光子吸收系数和非线性折射率分别达到25.616×104 cm/GW和8.235×10−13 m2/W，比单层GeSe膜提高了4倍以上。进一步的光限特性分析表明，起始和光限阈值分别为0.043和0.711 GW/cm2。这种多层膜设计策略显著提高了GeSe的非线性光学性能，为开发基于二维材料的高效光调制器和光开关提供了可能性。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.