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Pumping of Quantum Dots with Surface Acoustic Waves
Author(s) -
Bödefeld C.,
Wixforth A.,
Toivonen J.,
Sopanen M.,
Lipsanen H.
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<703::aid-pssb703>3.0.co;2-x
Subject(s) - quantum dot , exciton , surface acoustic wave , electric field , acoustic wave , electron , physics , quantum well , semiconductor , electro absorption modulator , quantum , quantum dot laser , condensed matter physics , optoelectronics , optics , quantum mechanics , laser , semiconductor laser theory
Surface acoustic waves on a semiconductor quantum well structure are accompanied by strong lateral piezo‐electric fields. Those fields can ionize photo‐generated excitons and trap the fragments, electron–hole pairs, in the moving lateral potential wells to the wave. We show that self‐assembled quantum dots present in the structure can act as very efficient recombination centers and demonstrate the concept of a periodically pumped quantum dot.