High-Performance Ultraviolet MoS2 Photodetector Based on the Plasmonic Effect

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-06 DOI:10.1016/j.optcom.2025.132424

Zou Qiping , Wang Wenxuan , Jiang Yue , Chen Zanhui , Deng Xing , Sun Tangyou

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引用次数: 0

Abstract

Ultraviolet (UV) photodetectors are critical for applications ranging from environmental monitoring to biomedical imaging. While MoS₂ offers exceptional carrier mobility and layer-tunable bandgaps for UV-sensitive band alignment, its intrinsically weak UV absorption limits practical performance. Herein, we address this limitation by integrating gold nanoparticles (Au NPs) with MoS₂ to fabricate photodetectors, where the periodic Au NPs array induces plasmonic effect to enhance light-matter interaction. Finite-difference time-domain (FDTD) simulations confirm that the plasmonic effect significantly boosts light absorption via strong local field enhancement at nanogaps. Therefore, we fabricated MoS₂ photodetectors enhanced by the Au-nanoparticle-on-substrate structure (Anss). Under 395 nm UV illumination, the detectivity (D∗) and Responsivity (R) of the MoS₂/Anss device reached 1.40 × 1011 Jones and 2.31 A/W, respectively, representing enhancements by a factor of 12.97 and 15.4 compared to devices without Au nanoparticles. It is clear from the enhanced responsivity that the Au nanoparticle-modified design provides superior performance in UV detection applications.

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基于等离子体效应的高性能紫外二硫化钼光电探测器

紫外（UV）光电探测器对于从环境监测到生物医学成像的应用至关重要。虽然MoS2为紫外敏感带对准提供了出色的载流子迁移率和层可调带隙，但其固有的弱紫外吸收限制了实际性能。在此，我们通过将金纳米粒子（Au NPs）与MoS2集成来制造光电探测器来解决这一限制，其中周期性Au NPs阵列诱导等离子体效应以增强光-物质相互作用。时域有限差分（FDTD）模拟证实了等离子体效应在纳米间隙处通过强局部场增强显著地促进光吸收。因此，我们制作了由金纳米粒子-衬底结构（Anss）增强的MoS2光电探测器。在395 nm紫外光照射下，MoS2/Anss器件的探测率（D∗）和响应率(R)分别达到1.40 × 1011 Jones和2.31 A/W，与未添加Au纳米粒子的器件相比，分别提高了12.97和15.4倍。从增强的响应性可以清楚地看出，金纳米粒子修饰的设计在紫外检测应用中提供了卓越的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.