基于单层二硫化钼和金纳米柱的可见光波段宽带吸收器

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中图分类号：O436.2文献标志码：A

Visible-light broadband absorber based on monolayer molybdenum disulfide and gold nanopillars

FAN Peng，TANG Zhihang，WANG Qi （School of Optical-Electrical and Computer Engineering， University of Shanghai for Scienceand Technology，Shanghai 20oo93，China）

Abstract：The study proposes a broadband absorber for visible band that is designed based on local surface plasmon resonance and incorporating monolayer molybdenum disulfide， gold nanopillars， and Bragg mirrors. Theoretical simulations using the finite-difference time-domain （FDTD） method demonstrated that the MoS2 -based absorber achieved absorptivities exceeding 96.0% and 99.8% at resonance wavelengths of 422nm and 571nm ， respectively. The spectral characteristics remained stable within an incidence angle range from 0∘ to 45∘ and exhibited polarization-independent behavior. Additionally， performance of the absorber could be tuned by modifying the geometric parameters of the periodic gold nanopillar array. This design strategy is applicable to other transition metal dichalcogenides （TMDCs），and its application effectively enhanceslight-matter interactionsin such materials.

Keywords： broadband absorber; monolayer molybdenum disulfide; gold nanopillars array; local surface plasmon resonance; transition metal dichalcogenides

引言

二维材料，如石墨烯和过渡金属二硫化物（transitionmetal dichalcogenides，TMDCs），因其卓越的电学、力学和光学特性，已被视为未来光电器件的关键材料[1]。（剩余9060字）