Whispering-gallery modes observed in elastic scattering from submerged high-refractive-index silica microspheres

Hasan Yilmaz, Huzeyfe Yilmaz, Mehmet Selman Tamer, Oǧuzhan Gürlu, Mohammed Sharif Murib, Ali Serpengüzel

Research output: Contribution to journalArticleScientificpeer-review

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 languageEnglish
Article number126110
Number of pages6
JournalOptical Engineering
Volume56
Issue number12
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • fiber optic sensors
  • fiber optics
  • Mie theory
  • resonators
  • scattering
  • spectroscopy

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