- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
A Phase Sensitivity-Enhanced Surface Plasmon Resonance Biosensor Based on ITO-Graphene Hybrid Structure
摘要： In this paper, a surface plasmon resonance (SPR) sensor based on the hybrid structure of silver (Ag)-indium tin oxide (ITO)-graphene is proposed and investigated. SPR biosensors are subdivided into three kinds of structures Ag, Ag-graphene, and Ag-ITO-graphene, when carried out using their respective optimized structure parameters. According to our analysis and comparison, the ITO-assisted SPR biosensor has an optimal reflectivity of 3.587 × 10?8 and a maximum phase sensitivity of 1.707 × 106°/RIU, which shows that ITO can be employed to further enhance the SPR sensing performance even with the existence of graphene.
关键词： Surface-plasmon-resonance,Hybrid structure,Phase sensitivity,Reflectivity
更新于2025-09-23 15:21:01
-
Ultra-Wideband Low-Loss Control of Terahertz Scatterings via an All-Dielectric Coding Metasurface
摘要： Despite the growing interests for controlling of terahertz (THz) scatterings via metallic metasurfaces, the avoidance of Ohmic loss resulting from the interaction between light and phonons or free electrons remains an arduous task. Herein, we propose a new approach of ultra-wideband low-loss control of THz-scatterings via all-dielectric coding metasurface (DCMF). In our experiments, the DCMFs manipulate THz waves remarkably in an ultra-wideband of 900 GHz. When a THz wave enters into the DCMFs, it emerges split into two Bessel-beams with a higher amplitude of transmission up to 60%, and the lower amplitude about 30%. In our simulations the high amplitude of transmission even may achieve 99%. Besides, the variation of coding sequence enables diversification of manipulation for THz-scatterings. Notably, the DCMF with the sequence of ‘101010…’ refracts a beam of 1.3THz in two directions. The energy of the main beam seems to dissipate at all. We also fins that, as a beam of 1.63 THz passes through the DCMFs consisting of the sequence of ‘110110…’, its energy may scatter in multiple directions, demonstrating an unprecedented control of THz-scatterings. Our results not only enriches the strategy of THz modulation but also guides the superior design for THz devices.
关键词： modulation,Terahertz,coding metasurface,metamaterial,phase sensitivity
更新于2025-09-19 17:13:59