Cooperative recombination of electron-hole pairs in semiconductor quantum wells under quantizing magnetic fields

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

作者机构：Department of Information and Communications Gwangju Institute of Science and Technology Gwangju 500-712 Republic of Korea 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 Joint Quantum Institute NIST & University of Maryland Gaithersburg Maryland 20899 USA 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2010年第81卷第15期

页      面：155314-155314页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Science Foundation  NSF  (0084173  0530220  0547019) 

摘      要：We present results of detailed investigations of light emission from semiconductor multiple quantum wells at low temperatures and high magnetic fields excited by intense femtosecond laser pulses. The intensity and linewidth as well as the directional and statistical properties of photoemission strongly depended on the magnetic field strength and pump laser fluence. We also investigated the effects of spot size, temperature, excitation geometry, and excitation pulse width on the emission properties. The results suggest that the initially incoherent photoexcited electron-hole pairs spontaneously form a macroscopic coherent state upon relaxation into the low-lying magnetoexcitonic states, followed by the emission of a superfluorescent burst of radiation. We have developed a theoretical model for superfluorescent emission from semiconductor quantum wells, which successfully explained the observed characteristics.