Hybrid plasmonic microcavity with an air-filled gap for sensing applications
| Autor: | Genzhu Wu, Meng Zhang, Daru Chen, Binbin Liu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Mode volume
Materials science business.industry Sensing applications Physics::Optics 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Quality (physics) Optics 0103 physical sciences Optoelectronics Effective mode volume Sensitivity (control systems) Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology business Refractive index Plasmon |
| Zdroj: | Optics Communications. 380:6-9 |
| ISSN: | 0030-4018 |
| Popis: | In this paper, a novel hybrid plasmonic microcavity with air-filled regions in the low-permittivity dielectric gap is proposed for sensing applications. Compared with the conventional structure with homogeneous gap, the introduced air-filled regions could improve the key modal characteristics of the hybrid mode. Simulation results reveal that this kind of hybrid microcavity maintains low loss with high quality factor ∼3062, and high field confinement with small mode volume 0.891 µm 3 . Moreover, in the sensing applications, this hybrid microcavity features simultaneously large refractive index sensitivity of 100 nm/RIU (refractive index unit) and relatively high quality factor of 3062. Hence, it shows that the hybrid plasmonic microcavity has potential applications in ultra-compact refractive index sensor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect