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Picosecond Spectroscopy of CdSe at High Excitation
Author(s) -
Collet J.,
Pugnet M.,
Cornet A.,
Brousseau M.,
Razbirin B. S.,
Mikhailov G. V.
Publication year - 1981
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/pssb.2221030141
Subject(s) - exciton , biexciton , excitation , picosecond , atomic physics , spectroscopy , radiative transfer , quasiparticle , line (geometry) , luminescence , ground state , physics , condensed matter physics , optics , laser , quantum mechanics , superconductivity , geometry , mathematics
At 4.2 K, the time resolved luminescence is studied of CdSe platelets, using two‐photon excitation at 1.064 μm and monopulsed excitation. At first the importance is shown of lattice heating and quasiparticle heating in high excitation experiments in CdSe. Then, the simultaneous kinetics of the A–LO excitonic line and the so‐called P line is studied. In the experiments, the P line cannot at all be interpreted as resulting of radiative exciton–exciton collisions. It is shown that the previously proposed radiative transition from the Γ 1 biexciton ground state to the 2p exciton state provides the best understanding of the dynamical behaviour of the P line. A binding energy of 1.4 meV for the biexciton in CdSe is deduced.