Ultrafast spectroscopy of carriers and excitons in semiconductor microcavities

Experiments probing both the linear and nonlinear response of strongly coupled GaAs/ A1GaAs microcavities using femtosecond spectroscopy are described. Vacuum-Rabi oscillations are observed following resonant coherent impulsive excitation, with a decay time equal to twice the cavity lifetime as expe...

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Bibliographic Details
Published in:Progress in crystal growth and characterization of materials 1996, Vol.33 (1), p.155-160
Main Authors: Norris, T.B., Rhee, J.K., Lai, R., Citrin, D.S., Nishioka, M., Arakawa, Y.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Optics
Physics
Resonators, cavities, amplifiers, arrays, and rings
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Summary:Experiments probing both the linear and nonlinear response of strongly coupled GaAs/ A1GaAs microcavities using femtosecond spectroscopy are described. Vacuum-Rabi oscillations are observed following resonant coherent impulsive excitation, with a decay time equal to twice the cavity lifetime as expected. Off-resonant excitation results in a long (≈600 ps) decay, resulting from the slow scattering of excitons into k≈0 states, and thermalized luminescence. In the nonlinear response, a dynamic reduction in the normal-mode splitting is observed. In nonresonant excitation, this is followed by gain-switched lasing.
ISSN:0960-8974
1878-4208
DOI:10.1016/0960-8974(96)83634-5