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Time‐Resolved Spectroscopy of Single Quantum Dots: Evidence for Phonon‐Assisted Carrier Feeding
Author(s) -
Türck V.,
Rodt S.,
Heitz R.,
Strassburg M.,
Pohl U.W.,
Bimberg D.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(200104)224:3<643::aid-pssb643>3.0.co;2-l
Subject(s) - cathodoluminescence , quantum dot , phonon , quantum tunnelling , charge carrier , spectroscopy , materials science , luminescence , condensed matter physics , optoelectronics , semiconductor , chemical physics , molecular physics , chemistry , physics , quantum mechanics
Interactions of semiconductor quantum dots (QDs) with their nano‐environment can significantly alter their electronic properties. In this work, we present results of time‐resolved cathodoluminescence for single ZnCdSe QDs identifying a slow carrier feeding mechanism which leads to long living excitonic luminescence. The feeding is attributed to a phonon‐assisted tunneling of charge carriers trapped in the vicinity of the QDs.