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Energy and momentum broadening of planar microcavity polaritons measured by resonant light scattering

Langbein, Wolfgang Werner 2004. Energy and momentum broadening of planar microcavity polaritons measured by resonant light scattering. Journal of Physics: Condensed Matter 16 (35) , S3645-S3652. 10.1088/0953-8984/16/35/006

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Abstract

We present measurements of polariton broadening in energy and momentum space as a function of in-plane momentum in a planar microcavity by directional resonant light scattering in both time-integrated and time-resolved experiments. When optically exciting the lower polariton branch, the strong dispersion versus wavevector results in a directional emission on a ring. For continuous wave excitation, the ring width is shown to be consistent with the polariton spectral line width and dispersion. For pulsed excitation, the ring width decreases with increasing time after excitation, giving evidence for the time–energy uncertainty in the dynamics of the scattering by disorder. The ring width converges for long times to a finite value, a measure of the intrinsic momentum broadening of the polariton states by multiple disorder scattering.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: IOP Publishing
ISSN: 0953-8984
Related URLs:
Last Modified: 04 Jun 2017 08:00
URI: http://orca.cf.ac.uk/id/eprint/71377

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