Linewidth-narrowing phenomena with intersubband cavity polaritons

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.89.205319
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TypeArticle
Journal titlePhysical Review B - Condensed Matter and Materials Physics
ISSN1098-0121
Volume89
Issue20
Article number205319
Pages15; # of pages: 5
AbstractAbsorption spectra of strongly coupled intersubband cavity polaritons have been measured, using a tunable midinfrared quantum cascade laser, with high angular and spectral resolution. Pronounced linewidth narrowing of the polaritons around the anticrossing was found, with polariton linewidths narrower (4.2 meV) than both the bare intersubband transition linewidth and empty cavity linewidth (6.2 and 6 meV, respectively), at room temperature. This is due to variations in the degree of spatial averaging of the in-plane quantum-well disorder as the polariton's extended coherence length is increased by the photonic coupling over the value corresponding to the bare intersubband transition coherence length.
Publication date
LanguageEnglish
AffiliationInformation and Communication Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21272730
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Record identifiera9a31d6a-4332-4128-98d8-5f7610167cdd
Record created2014-12-03
Record modified2016-05-09
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