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Gigantic Photon–Photon Coupling in Biased Semiconductor Microcavities: A Step toward Single‐Photon Blockade
Author(s) -
Rüfenacht M.
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<151::aid-pssb151>3.0.co;2-9
Subject(s) - physics , photon , biasing , polariton , coupling (piping) , semiconductor , quantum well , optoelectronics , exciton , condensed matter physics , optics , quantum mechanics , voltage , laser , materials science , metallurgy
We discuss optical nonlinearities in biased semiconductor microcavities. Optical nonlinearities arise from field screening by spatially separated electron–hole pairs in biased quantum wells (QWs). However, in wide QWs where the spatial separation is large, biasing is accompanied by a drastic decrease of oscillator strength, and has a negative impact on the optical nonlinearity. We show here that in an exciton polariton microcavity in the strong coupling regime, a decrease in oscillator strength only weakly affects the optical nonlinearity. Gigantic enhancement of photon–photon interaction is then realized by biasing, and the single‐photon blockade limit can be reached.