Exciton correlations in coupled quantum wells and their luminescence blue shift
نویسندگان
چکیده
منابع مشابه
Exciton condensation in coupled quantum wells
Bound electron–hole pairs—excitons—are Bose particles with small mass. Exciton Bose–Einstein condensation is expected to occur at a few degrees Kelvin—a temperature many orders of magnitude higher than for atoms. Experimentally, an exciton temperature well below 1 K is achieved in coupled quantum well (CQW) semiconductor nanostructures. In this contribution, we review briefly experiments that s...
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Due to the long lifetime of indirect ~interwell! excitons, exciton condensation ~analogous to the BoseEinstein condensation of bosons! is expected to occur in coupled quantum wells ~CQW’s!. The critical conditions for the exciton condensation have been predicted to be strongly improved by high magnetic field perpendicular to the well plane. We present results of experimental study of transport ...
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Time-resolved cathodoluminescence (CL) techniques have been employed to examine the optical properties and kinetics of carrier relaxation in a InGaN/GaN single quantum well (QW) sample. CL images of the QW sample revealed a spotty cellular pattern indicative of local In compositional variations, which induce local potential fluctuations and result in a strong lateral excitonic localization at I...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.80.195313