Premium
Crossover from Exciton to Biexciton Cavity Polaritons
Author(s) -
Saba M.,
Quochi F.,
Ciuti C.,
Oesterle U.,
Staehli J.L.,
Deveaud B.,
Bongiovanni G.,
Mura A.
Publication year - 2000
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 - 10.1002/1521-3951(200009)221:1<157::aid-pssb157>3.0.co;2-m
Subject(s) - biexciton , exciton , oscillator strength , polariton , excited state , physics , condensed matter physics , semiconductor , atomic physics , optoelectronics , quantum mechanics , spectral line
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 σ + pump pulses (100 fs long) and probed at different delays by weak counter‐polarised σ — test pulses. We show that the presence of σ + excitons can completely inhibit the creation of σ — excitons. With increasing σ + exciton density the oscillator strength of the σ — 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.