Abstract
Low-temperature photoluminescence-excitation spectra are studied in an -type modulation-doped -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.
- Received 17 November 2006
DOI:https://doi.org/10.1103/PhysRevLett.99.126803
©2007 American Physical Society