We report novel oscillator strength transfer phenomena induced by the exciton-exciton correlation. A high quality semiconductor microcavity is resonantly excited by intense circularly polarised sigma(+) pump pulses (100 fs long) and probed at different delays by weak counter-polarised sigma(-) test pulses. We show that the presence of sigma(+) excitons can completely inhibit the creation of sigma(-) excitons. With increasing sigma(+) exciton density the oscillator strength of the a- transition is transferred to the biexciton transition, permitting the first observation of the strong coupling regime between the biexciton transition and the cavity photon mode, i.e., the biexciton polariton states.
Crossover from exciton to biexciton cavity polaritons
SABA, MICHELE;QUOCHI, FRANCESCO;BONGIOVANNI, GIOVANNI LUIGI CARLO;MURA, ANTONIO ANDREA
2000-01-01
Abstract
We report novel oscillator strength transfer phenomena induced by the exciton-exciton correlation. A high quality semiconductor microcavity is resonantly excited by intense circularly polarised sigma(+) pump pulses (100 fs long) and probed at different delays by weak counter-polarised sigma(-) test pulses. We show that the presence of sigma(+) excitons can completely inhibit the creation of sigma(-) excitons. With increasing sigma(+) exciton density the oscillator strength of the a- transition is transferred to the biexciton transition, permitting the first observation of the strong coupling regime between the biexciton transition and the cavity photon mode, i.e., the biexciton polariton states.
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