Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing
| Autor: | Changming Chen, Daming Zhang, Yunji Yi, Xibin Wang, Chunxue Wang, Hongjun Gu, Fei Wang, He Gong, Xiaoqiang Sun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
inner-wall grating slot waveguide Silicon on insulator 02 engineering and technology Grating lcsh:Chemical technology 01 natural sciences Biochemistry label-free Article Analytical Chemistry 010309 optics Slot-waveguide Resonator 0103 physical sciences lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation Label free business.industry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics optics microring resonator Optoelectronics bulk sensing 0210 nano-technology business Sensitivity (electronics) Refractive index |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 19 Issue 22 Sensors, Vol 19, Iss 22, p 5038 (2019) |
| ISSN: | 1424-8220 |
| DOI: | 10.0199/v1 |
| Popis: | In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 &mu m × 13 &mu m on the silicon-on-insulator (SOI) platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. The IG-SMRR has an ultra-large quasi-FSR of 84.5 nm as the detection range, and enlarged factor is up to over 3 compared with the conventional SMRR. The concentration sensitivities of sodium chloride solutions and D-glucose solutions are 996.91 pm/% and 968.05 pm/%, respectively, and the corresponding refractive index (RI) sensitivities are 559.5 nm/RIU (refractive index unit) and 558.3 nm/RIU, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future. |
| Databáze: | OpenAIRE |
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