This article is cited in 6 papers

Low-dimensional systems

An (AlGaAs/GaAs/AlGaAs)60 resonant Bragg structure based on the second quantum-confinement level of heavy-hole excitons in quantum wells

V. V. Chaldyshev, D. E. Sholokhov, A. P. Vasil'ev

Ioffe Institute, St. Petersburg

Abstract: Photoluminescence and optical-reflection spectra of a periodic structure consisting of 60 tunneling-isolated GaAs quantum wells separated by AlGaAs barriers are studied. The structure is designed so that, for a certain angle of incidence $(\sim$23$^\circ)$, the Bragg resonance condition is satisfied for light with a photon energy equal to the energy of heavy-hole excitons at the second quantum-confinement level in the wells. It is established experimentally that, under the conditions of double exciton-polariton and Bragg resonance, a superradiant optical mode is formed. Dependences of Bragg and exciton-polariton reflection on the angle of incidence and polarization of light and the temperature are investigated.

Received: 22.03.2010
Accepted: 30.03.2010

 English version: Semiconductors, 2010, 44:9, 1222–1226

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