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Ultra-Sensitive Refractive Index Sensing Based on Quasi-BICs in All-Dielectric Nanorod Array.
- Source :
- Photonics; Jun2024, Vol. 11 Issue 6, p503, 12p
- Publication Year :
- 2024
-
Abstract
- We propose an all-dielectric nanorod array for ultra-sensitive refractive index sensing based on quasi-bound states in the continuum (BICs). The nanorod is fabricated by silicon or silicon with an air hole, i.e., the hollow silicon nanorod. The quasi-BICs are formed in the hollow silicon nanorod array due to the symmetry-breaking of air holes. The high-quality factor (Q-factor) and ultra-narrow reflectance spectral width at quasi-BICs contribute to high performances of the sensor. The numerical results show that the sensitivity and figure of merit (FOM) can reach up to 602.9 nm/RIU and 34,977, respectively. The results indicate that the proposed nanostructures of quasi-BICs are promising for advanced biosensing applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- NANORODS
QUASI bound states
REFRACTIVE index
SPECTRAL reflectance
BOUND states
Subjects
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 11
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- 178196084
- Full Text :
- https://doi.org/10.3390/photonics11060503