# Polarization conversion in a silica microsphere

## TL;DR

This paper demonstrates efficient polarization conversion in a silica microsphere resonator, showing potential for controlling light polarization in integrated photonic devices.

## Contribution

It presents the first experimental demonstration of polarization-selective phenomena in a silica microsphere with high conversion efficiency.

## Key findings

- Achieved approximately 75% polarization conversion efficiency.
- Validated a simple ring resonator model fitting experimental data.
- Showed polarization control through optimization of input light polarization.

## Abstract

We experimentally demonstrate controlled polarization-selective phenomena in a whispering gallery mode resonator. We observed efficient ($\approx 75 %$) polarization conversion of light in a silica microsphere coupled to a tapered optical fiber with proper optimization of the polarization of the propagating light. A simple model treating the microsphere as a ring resonator provides a good fit to the observed behavior.