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.
@article{arxiv.cond-mat/0209440,
title = {Lasing from a single quantum wire},
author = {Yuhei Hayamizu and Masahiro Yoshita and Shinichi Watanabe and Hidefumi Akiyama and Loren N. Pfeiffer and Ken W. West},
journal= {arXiv preprint arXiv:cond-mat/0209440},
year = {2009}
}