Ultra-low threshold polariton lasing at room temperature in a GaN membrane microcavity with a zero-dimensional trap.

ABSTRACT: Polariton lasers are coherent light sources based on the condensation of exciton-polaritons in semiconductor microcavities, which occurs either in the kinetic or thermodynamic (Bose-Einstein) regime. Besides their fundamental interest, polariton lasers have the potential of extremely low operating thresholds. Here, we demonstrate ultra-low threshold polariton lasing at room temperature, using an all-dielectric, GaN membrane-based microcavity, with a spontaneously-formed zero-dimensional trap. The microcavity is fabricated using an innovative method, which involves photo-electrochemical etching of an InGaN sacrificial layer and allows for the incorporation of optimally-grown GaN active quantum wells inside a cavity with atomically-smooth surfaces. The resulting structure presents near-theor

SUBMITTER: Jayaprakash R 

PROVIDER: S-EPMC5514101 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature