Crossover from exciton to biexciton polaritons in semiconductor microcavities

Pump-probe measurements in a microcavity containing a quantum well show that a population of circularly polarized (sigma(+)) excitons can completely inhibit the transition to sigma(-) one-exciton states by transferring the oscillator strength to the biexcitonic resonance. With increasing pump intensity the linear exciton-polariton doublet evolves into a triplet polariton structure and finally into a shifted biexciton-polariton doublet. A theoretical model of interacting excitons demonstrates that the crossover from exciton to biexciton polaritons is driven by three-exciton Coulomb correlation.


Published in:
Physical Review Letters, 85, 2, 385-388
Year:
2000
ISSN:
0031-9007
Keywords:
Note:
PH Ecublens, Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy. Univ Cagliari, INFM, I-09042 Monserrato, CA, Italy. Saba, M, PH Ecublens, Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 331ZN
Times Cited: 18
Cited Reference Count: 18
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 Record created 2007-08-31, last modified 2018-12-03


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