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

Abstract

Controlling of the Goos-Hänchen (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 transmit ted 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 sublu minal or superluminal light propagation in reflected and transmitted pulses can be achieved.

Controlling Goos–Hänchen shift in a negative-refractive-index quantum-dot nanostructure

“…The intracavity medium can consist of gas atoms [32] or a semiconductor layer [33]. However, here we assume that the intracavity medium consists of semiconductor double QDs.…”

“…The GH shifts in the reflected and transmitted light beam from a fixed cavity consisting of semiconductor nanostructures have been analyzed using different controllable parameters such as detuning, intensity of the control field, and electron tunneling [28]. Moreover, the features of GH shifts in reflected and transmitted light beams in various multi-level atomic systems with different configurations have been discussed by many groups [29][30][31][32][33][34]. To the best of our knowledge, GH shifts in reflected and transmitted light beams from a fixed cavity with negative-refractive-index QD nanostructure have not been reported yet.…”

Phase control of optical Goos–Hänchen shifts in a quantum dot nanostructure via high refractive index

“…The GH changes may help nano optics and accurate measurement [15,16]. There has been a lot of research on GH changes based on multiple processes [17][18][19][20][21]. There has been a lot of research on the amplification of negative and positive GH shifts in reflected and transmitted light beams from * Author to whom any correspondence should be addressed.…”

“…There has been a lot of research on the amplification of negative and positive GH shifts in reflected and transmitted light beams from * Author to whom any correspondence should be addressed. a cavity with a faulty layer [17,[22][23][24]. Hamedi et al [25] investigated how double dark-state resonances may be used to control GH shifts from a cavity with mercury atoms.…”

Controllable Goos–Hänchen shift and optical switching in an Er3 + -doped yttrium aluminum garnet crystal

“…In recent years, based on the * Authors to whom any correspondence should be addressed. atomic coherence and quantum interference effect [21][22][23][24], many schemes have been proposed for realizing GH shift with all-optical tunable capability in a cavity containing atomic vapors [25][26][27][28][29][30][31][32][33], quantum wells [34][35][36] and quantum dots [5,[37][38][39]. For instance, Wang et al first proposed a scheme for the coherent manipulation of the reflected and transmitted GH shifts via applying a coherent control field onto the two-level atoms [25].…”