One-dimensional band-edge absorption in a doped quantum wire.
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.
Ihara
Toshiyuki
T
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
Hayamizu
Yuhei
Y
Yoshita
Masahiro
M
Akiyama
Hidefumi
H
Pfeiffer
Loren N
LN
West
Ken W
KW
D008956:Models, Chemical; D015233:Models, Statistical; D036103:Nanotechnology / Q000295:instrumentation*; D045663:Quantum Dots; D011789:Quantum Theory; D013053:Spectrophotometry / Q000295:instrumentation