Abstract
The effect of the discrete values of the refractive index of the surrounding medium on the spectral behavior of the whispering-gallery modes (WGMs) in the elastic scattering spectra of high-refractive-index silica microspheres submerged in fluids, such as air, water, and glycerol, is studied. The elastic scattering spectral measurements, as well as the spectral autocorrelation analysis of these elastic scattering spectra show that the spectral-mode spacing, the spectral-mode density, and the spectral-mode definition of the WGMs decrease as the refractive index of the surrounding fluid increases. We believe that this work opens up the way for optofluidic applications of high-refractive-index silica microsphere-based guided wave optics.
| Original language | English |
|---|---|
| Article number | 126110 |
| Journal | Optical Engineering |
| Volume | 56 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2017 |
Bibliographical note
Publisher Copyright:© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).
Funding
We would like to acknowledge the partial support of this research by the Scientific and Technological Research Council of Turkey (TUBITAK) Grant No. EEEAG-106E215 and the European Commission Grants Nos. FP6-IST-003887 NEMO and FP6-IST-511616 PHOREMOST.
| Funders | Funder number |
|---|---|
| Scientific and Technological Research Council of Turkey | |
| TUBITAK | |
| European Commission | FP6-IST-511616, FP6-IST-003887 |
Keywords
- Mie theory
- fiber optic sensors
- fiber optics
- resonators
- scattering
- spectroscopy