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Title
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Observation of long-lived polariton states in semiconductor microcavities across the parametric threshold
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Author
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Abstract
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| The excitation spectrum around the pump-only stationary state of a polariton optical parametric oscillator in semiconductor microcavities is investigated by time-resolved photoluminescence. The response to a weak pulsed perturbation in the vicinity of the idler mode is directly related to the lifetime of the elementary excitations. A dramatic increase of the lifetime is observed for a pump intensity approaching and exceeding the optical parametric oscillator threshold. The observations can be explained in terms of a critical slowing down of the dynamics upon approaching the threshold and the following appearance of a soft Goldstone mode in the spectrum. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
,
2009
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.102.056402
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Volume/pages
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102
:5
(2009)
, 4 p.
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Article Reference
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056402
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ISI
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000263166400041
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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