Room-temperature exciton-polariton and photonic lasing in GaN/InGaN core-shell microrods

Room-temperature exciton-polariton is observed in GaN/InGaN core-shell microrods grown by metal-organic vapor phase epitaxy. We demonstrate a large Rabi splitting in the core-shell microrod structure over 265 meV. Room-temperature lasing in core-shell microrods is confirmed by power-dependent photoluminescence spectra. The lasing in the shell layer results to a modulated lasing wavelength and takes one step further to more stable polariton lasing in MQW core-shell microrods.