Control of Lasing from Bloch States in Microcavity Photonic Wires via Selective Excitation and Gain

Abstract

Polariton lasers, which provide low-threshold lasing, are sought as energy-efficient light sources for photonic devices. The authors create deep photonic wires in organic microcavities, altering their angle-dependent emission to facilitate polariton dispersions with coexisting localized and extended states. Selective excitation precisely controls the build-up of coherent modes, providing tunable lasing on the microscale. These experiments are performed at room temperature under ambient conditions, and thus are clearly adaptable to real-world applications.