Journal article
Exciton-polariton eigenmodes in light-coupledIn0.04Ga0.96As/GaAssemiconductor multiple-quantum-well periodic structures
Physical review. B, Condensed matter, Vol.61(20), pp.13863-13872
05/2000
DOI: 10.1103/PhysRevB.61.13863
Abstract
Features of exciton-polariton eigenmodes in a series of light-coupled In0.04Ga0.96As/GaAs semiconductor multiple quantum wells with varying number of quantum wells N from 1 to 100, and with various periodicities (Bragg, near-Bragg, and anti-Bragg), are studied in linear measurements of reflection, transmission, and absorption. At Bragg periodicity (period d=λx/2), a photonic band-gap mode grows in amplitude and increases linearly in linewidth with increasing N. The N times increased radiative damping rate is seen to arise from the light character of the eigenmode being swept out of a photonic band-gap structure. The slope of linewidth versus N gives the radiative linewidth of the exciton. Away from Bragg periodicity two branches of energy levels can be resolved in absorption, corresponding to the N exciton-polariton normal modes in the multiple-quantum-well structure. Signatures of individual modes becoming optically active are observed in the rich structure of reflection spectra for changing quantum-well periodicity. Antireflection coating of the samples is shown to be an effective way of thus isolating the multiple-quantum-well response.
Details
- Title: Subtitle
- Exciton-polariton eigenmodes in light-coupledIn0.04Ga0.96As/GaAssemiconductor multiple-quantum-well periodic structures
- Creators
- J. P Prineas - University of ArizonaC Ell - University of ArizonaE. S Lee - University of ArizonaG Khitrova - Optical Sciences (United States)H. M Gibbs - University of ArizonaS. W Koch - Optical Sciences (United States)
- Resource Type
- Journal article
- Publication Details
- Physical review. B, Condensed matter, Vol.61(20), pp.13863-13872
- DOI
- 10.1103/PhysRevB.61.13863
- NLM abbreviation
- Phys Rev B Condens Matter
- ISSN
- 0163-1829
- eISSN
- 1095-3795
- Publisher
- American Physical Society
- Language
- English
- Date published
- 05/2000
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200040102771
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