Optical modulation in microsized optical resonators with irregular hexagonal cross-section

Abstract

Optical resonant modes in microwire cavities with irregular hexagonal cross-section have been observed in the visible spectral range. Single-crystalline In₂O₃ microwire functioning as a promising semiconductor microcavity, was fabricated by a simple sublimation–oxidation–deposition strategy. By using a spatially resolved spectroscopic technique, the effects of the cross sectional geometry on optical modulations was carefully investigated. The experimental results fitted well with the plane wave interference model and finite element method simulations. Our results demonstrate that the In₂O₃ microwire optical resonator offers another practical example for the study of fundamental physics in the field of cavity optics, and may be helpful for the development of miniature cavity-based optoelectronic devices.