Measurement of the linear thermo-optical coefficient of Ga$_{0.51}$In$_{0.49}$P using photonic crystal nanocavities

TL;DR

This paper measures the linear thermo-optical coefficient of Ga$_{0.51}$In$_{0.49}$P using photonic crystal nanocavities, providing key data for thermally tunable nanophotonic device design.

Contribution

It reports the first measurement of the thermo-optical coefficient of Ga$_{0.51}$In$_{0.49}$P using photonic crystal nanocavities.

Findings

Thermo-optical coefficient $dn/dT$ = (2.0 ± 0.3) x 10^{-4} K^{-1}

Demonstrates the use of nanocavities for material property characterization

Provides data for thermally tunable nanophotonic applications

Abstract

Ga$_{0.51}$In$_{0.49}$P is a promising candidate for thermally tunable nanophotonic devices due to its low thermal conductivity. In this work we study its thermo-optical response. We obtain the linear thermo-optical coefficient $dn/dT=2.0\pm0.3\cdot 10^{-4}\,\rm{K}^{-1}$ by investigating the transmission properties of a single mode-gap photonic crystal nanocavity.