This article is cited in 13 papers

CONDENSED MATTER

Controlling of Goos-Hänchen shift via biexciton coherence in a quantum dot

S. H. Asadpour^a, R. Nasehi^b, M. Mahmoudi^b, H. R. Soleimani<sup>a

a</sup> Department of Physics, University of Guilan, P. O. Box 1914, 41335 Rasht, Iran
^b Department of Physics, Zanjan University, P.O. Box 45195-313, Zanjan, Iran

Abstract: Controlling of the Goos–Hönchen (GH) shifts of the reflected and transmitted probe pulses through a cavity containing four-level GaAs/AlGaAs quantum dot with 15 periods of 17.5 nm GaAs wells and 25-nm Al$_{0.3}$Ga$_{0.7}$As barriers is investigated. Under appropriate conditions, the probe absorption can be converted to the probe gain, therefore the controlling of negative and positive GH shift in the both reflected and transmitted probe beams can be occurred simultaneously. Our obtained results show that the group index of the probe beams could be negative or positive in both reflected and transmitted pulses. Therefore, simultaneous subluminal or superluminal light propagation in reflected and transmitted pulses can be achieved.

Received: 14.01.2015
Revised: 02.03.2015

Language: English

DOI: 10.7868/S0370274X15070127

 English version: Journal of Experimental and Theoretical Physics Letters, 2015, 101:7, 481–488

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