Cooperative Recombination of a Quantized High-Density Electron-Hole Plasma in Semiconductor Quantum Wells

作     者：Y. D. Jho Xiaoming Wang J. Kono D. H. Reitze X. Wei A. A. Belyanin V. V. Kocharovsky Vl. V. Kocharovsky G. S. Solomon 

作者机构：Department of Physics University of Florida Gainesville Florida 32611 USA National High Magnetic Field Laboratory Florida State University Tallahassee Florida 32310 USA Department of Electrical and Computer Engineering Rice University Houston Texas 77005 USA Department of Physics Texas A&M University College Station Texas 77843 USA Institute of Applied Physics Russian Academy of Sciences 603950 Nizhny Novgorod Russia Solid-State Laboratories Stanford University Stanford California 94305 USA 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2006年第96卷第23期

页      面：237401-237401页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：National Science Foundation, NSF, (0084173, 0547019, 0325474) National Science Foundation, NSF 

主　　题：.spontaneous linewidth omnidirectional randomly magnetic field High Magnetic perpendicular Scaling high-density Collimated Cooperative Recombination Electron-Hole Semiconductor Quantum 

摘      要：We investigate photoluminescence from a high-density electron-hole plasma in semiconductor quantum wells created via intense femtosecond excitation in a strong perpendicular magnetic field, a fully quantized and tunable system. At a critical magnetic field strength and excitation fluence, we observe a clear transition in the band-edge photoluminescence from omnidirectional output to a randomly directed but highly collimated beam. In addition, changes in the linewidth, carrier density, and magnetic field scaling of the photoluminescence spectral features correlate precisely with the onset of random directionality, indicative of cooperative recombination from a high-density population of free carriers in a semiconductor environment.