title: One-dimensional band-edge absorption in a doped quantum wire.
abstract: Low-temperature photoluminescence-excitation spectra are studied in an n-type modulation-doped T-shaped single quantum wire with a gate to tune electron densities. With a nondegenerate one-dimensional (1D) electron gas, the band-edge absorption exhibits a sharp peak structure induced by the 1D density of states. When the dense 1D electron gas is degenerate at a low temperature, we observe a Fermi-edge absorption onset without many-body modifications.
authors.affiliation: Institute for Solid State Physics (ISSP), University of Tokyo, and CREST, JST, 5-1-5, Kashiwanoha, Kashiwa, 277-8581 Chiba, Japan. ihara@issp.u-tokyo.ac.jp
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ihara
authors.forename: Yuhei
authors.initials: Y
authors.lastname: Hayamizu
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yoshita
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Akiyama
authors.forename: Loren N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: Ken W
authors.initials: KW
authors.lastname: West
mesh_terms: D008956:Models, Chemical; D015233:Models, Statistical; D036103:Nanotechnology / Q000295:instrumentation*; D045663:Quantum Dots; D011789:Quantum Theory; D013053:Spectrophotometry / Q000295:instrumentation