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| 基于单层二硫化钼和金纳米柱的可见光波段宽带吸收器 |
| Visible-light broadband absorber based on monolayer molybdenum disulfide and gold nanopillars |
| 投稿时间：2024-02-26 |
| DOI：10.3969/j.issn.1005-5630.202402260025 |
| 中文关键词: 宽带吸收器 单层二硫化钼 金纳米柱阵列 局部表面等离子体共振 过渡金属二硫化物 |
| 英文关键词:broadband absorber monolayer molybdenum disulfide gold nanopillars array local surface plasmon resonance transition metal dichalcogenides |
| 基金项目:国家自然科学基金(62375175) |
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| 中文摘要: |
| 基于局部表面等离子体共振效应，设计了一种由单层二硫化钼、金纳米柱及布拉格反射镜组成的可见光波段宽带吸收器。利用有限差分时域法进行理论模拟，结果显示：在422 nm和571 nm共振波长处，二硫化钼基吸收器的吸收率分别高于96.0%和99.8%。该吸收器的光谱特性在0°～45°入射角范围内保持相对稳定，且具有偏振无关性。此外，可通过调节周期性金纳米柱阵列的几何参数来调控该吸收器光谱特性。研究表明，该设计思想可拓展至过渡金属二硫化物体系，有效增强光与材料间的相互作用。 |
| 英文摘要: |
| 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 422 nm and 571 nm, 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 enhances light-matter interactions in such materials. |
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