Linear optical responses of one-dimensional electron systems: Comparison of theories with experiments

✍ Scribed by Tetsuo Ogawa; Ping Huai; Mutsuki Takagiwa; Kenichi Asano; Toshiyuki Ihara; Masahiro Yoshita; Hidefumi Akiyama

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 241 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.08.051

✦ Synopsis

We present a systematic study on the linear optical spectra of n-doped GaAs quantum wire. A Coulomb-correlated band-edge absorption peak appears at low doping density evolving from the exciton resonance. The Fermi-edge singularity is observed at high doping density. Based on theoretical calculations, we clarify the mechanism of the crossover among exciton, the band-edge and the Fermi-edge singularities.