Lasing from a single quantum wire

TL;DR

This paper demonstrates lasing from a single quantum wire in a 1-D ground state, achieved through optical pumping, with low threshold power and operation over a wide temperature range.

Contribution

It presents the first experimental realization of lasing from a single quantum wire in the 1-D ground state.

Findings

Single-mode lasing observed from the quantum wire

Operates from 5 to 60 K temperature range

Low threshold pumping power of 5 mW at 5 K

Abstract

A laser with an active volume consisting of only a single quantum wire in the 1-dimensional (1-D) ground state is demonstrated. The single wire is formed quantum-mechanically at the T-intersection of a 14 nm Al_{0.07}Ga_{0.93}As quantum well and a 6 nm GaAs quantum well, and is embedded in a 1-D single-mode optical waveguide. We observe single-mode lasing from the quantum wire ground state by optical pumping. The laser operates from 5 to 60 K, and has a low threshold pumping power of 5 mW at 5 K.