基于 LNOI 薄膜平台的宽带等离子改性 SnSe2 光电探测器,Advanced Materials Interfaces

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基于 LNOI 薄膜平台的宽带等离子改性 SnSe2 光电探测器
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2024-02-13 , DOI: 10.1002/admi.202301094
Yi Liu ₁ , Wenqing Sun ₁ , Zixu Sa ₁ , Fengjing Liu ₁ , Feng Ren ₂ , Zaixing Yang ₁ , Yuechen Jia ₁ , Xiaoli Sun ₁ , Feng Chen ₁

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绝缘体上铌酸锂（LNOI）由于其独特的铁电特性和光折变效应而被广泛认为是重要的光电集成平台。然而铌酸锂的宽带隙和弱吸收限制了其在集成光电探测领域的进一步应用。为了解决这个问题，提出将银纳米颗粒封装在LNOI结构内，通过局域表面等离子体共振（LSPR）效应来操纵改性铌酸锂的光场分布，并利用改性铌酸锂薄膜作为功能基底来定制光电器件。表面 SnSe ₂纳米片的特性，显着增强其光电检测能力。在相同条件下，基于嵌入Ag纳米粒子的LNOI的SnSe ₂光电探测器的光电流比原始LNOI增强了高达1912倍，这代表了报道的等离子体诱导光电探测增强的最高值。这项工作深化了等离子体改性二维材料和铁电材料的基础研究，促进了片上光电探测器的发展以及将所有必要组件集成在单个芯片上的全功能光子电路的实现。

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Broadband, Plasmon-Modified SnSe2 Photodetector Based on LNOI Thin-Film Platform

Lithium niobate on insulator (LNOI) is widely recognized as an essential optoelectronic integration platform due to its unique ferroelectric properties and photorefractive effect. However, the wide bandgap and weak absorption of lithium niobate limit its further application in integrated photodetection field. To address this issue, encapsulating silver nanoparticles within the LNOI structure are proposed to manipulate the light field distribution of modified lithium niobate through the localized surface plasmon resonance (LSPR) effect and utilize the modified lithium niobate thin film as a functional substrate to tailor the optoelectronic properties of surface SnSe₂ nanosheets, significantly enhancing their photodetection capabilities. The photocurrent of the SnSe₂ photodetector based on LNOI with embedded Ag nanoparticles is enhanced by up to 1912 times compared to that on the original LNOI under the same conditions, which represents the highest reported plasmonic-induced photodetection enhancement. This work deepens the basic research on plasmonic-modified 2D materials and ferroelectric materials, which promotes the development of on-chip photodetectors and the realization of fully functional photonic circuits that integrate all essential components on a single chip.

更新日期：2024-02-13

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