title: Dynamics of strongly degenerate electron-hole plasmas and excitons in single InP nanowires.
abstract: Low-temperature time-resolved photoluminescence spectroscopy is used to probe the dynamics of photoexcited carriers in single InP nanowires. At early times after pulsed excitation, the photoluminescence line shape displays a characteristic broadening, consistent with emission from a degenerate, high-density electron-hole plasma. As the electron-hole plasma cools and the carrier density decreases, the emission rapidly converges toward a relatively narrow band consistent with free exciton emission from the InP nanowire. The free excitons in these single InP nanowires exhibit recombination lifetimes closely approaching that measured in a high-quality epilayer, suggesting that in these InP nanowires, electrons and holes are relatively insensitive to surface states. This results in higher quantum efficiencies than other single-nanowire systems as well as significant state-filling and band gap renormalization, which is observed at high electron-hole carrier densities.
authors: Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011, USA.
authors: Lyubov V
authors: LV
authors: Titova
authors: Thang Ba
authors: TB
authors: Hoang
authors: Jan M
authors: JM
authors: Yarrison-Rice
authors: Howard E
authors: HE
authors: Jackson
authors: Yong
authors: Y
authors: Kim
authors: Hannah J
authors: HJ
authors: Joyce
authors: Qiang
authors: Q
authors: Gao
authors: H Hoe
authors: HH
authors: Tan
authors: Chennupati
authors: C
authors: Jagadish
authors: Xin
authors: X
authors: Zhang
authors: Jin
authors: J
authors: Zou
authors: Leigh M
authors: LM
authors: Smith
mesh_terms: D004583:Electrons; D007204:Indium / Q000737:chemistry*; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D010720:Phosphines / Q000737:chemistry*; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry*; D013997:Time Factors
chemical_list: D010720:Phosphines; D007204:Indium; C090882:indium phosphide; D012825:Silicon