Room temperature polariton lasing in a GaN∕AlGaN multiple quantum well microcavity

Abstract

The authors report room temperature polariton lasing at λ ∼ 345 nm in a hybrid Al In N ∕ Al Ga N multiple quantum wellmicrocavity (MQW-MC) containing a Ga N ∕ Al Ga N MQW active region, i.e., the achievement under nonresonant optical excitation of coherent light emission of a macroscopic population of polaritons occupying the lowest energy state of the lower polariton branch. This was made possible by taking advantage of the efficient relaxation of polaritons in a MQW-MC exhibiting a large vacuum Rabi splitting Ω VRS = 56 meV .