功勋
半最大全宽
激光线宽
等离子体子
折射率
波长
光学
材料科学
栅栏
表面等离子共振
电介质
光子学
光电子学
物理
激光器
纳米颗粒
纳米技术
作者
Shulin Tang,Chang Chang,Peiji Zhou,Yi Zou
出处
期刊:Photonics
[Multidisciplinary Digital Publishing Institute]
日期:2022-03-28
卷期号:9 (4): 224-224
被引量:9
标识
DOI:10.3390/photonics9040224
摘要
Plasmonic sensors have attracted intensive attention due to their high sensitivity. However, due to intrinsic metallic loss, plasmonic sensors usually have a large full width at half maximum (FWHM) that limits the wavelength resolution. In this paper, we numerically investigate and propose a dielectric grating-assisted plasmonic device, leveraging the bound states in the continuum (BIC) effect to suppress the FWHM of the resonance. We initiate quasi-SP-BIC modes at 1559 nm and 1905 nm wavelengths by slightly tilting the incident angle at 2° to break the symmetry, featuring a narrow linewidth of 1.8 nm and 0.18 nm at these two wavelengths, respectively. Refractive index sensing has also been investigated, showing high sensitivity of 938 nm/RIU and figure of merit (FOM) of 521/RIU at 1559 nm and even higher sensitivity of 1264 nm/RIU and FOM of 7022/RIU at 1905 nm.
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