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Excitonic polaritons in transverse magnetic fields
Author(s) -
Loginov D.K.,
Kochereshko V.P.,
Cox R.T.,
Besombes L.,
Mariette H.,
Davies J.J.,
Wolverson D.,
Smith L.C.
Publication year - 2010
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.200983188
Subject(s) - diamagnetism , exciton , bohr radius , magnetic field , polariton , biexciton , condensed matter physics , physics , exciton polaritons , bohr model , effective mass (spring–mass system) , atomic physics , quantum mechanics
Exciton‐polariton reflectivity of wide CdTe/CdZnTe quantum‐wells (with well widths exceeding by far the exciton Bohr radius) was measured in the Voigt geometry in a magnetic field. In a magnetic field, forbidden exciton lines were observed to appear for each exciton quantization level. The exciton diamagnetic shift constant was observed to decrease noticeably with increasing quantum number of the confined level. A comparison of calculated with experimental spectra reveals a growth of the exciton translational mass with increasing magnetic field. It has been shown that both the growth of mass and the decrease of the diamagnetic shift can be traced to mixing between exciton internal and translational motion states.