Electromagnetically induced transparency and theoretical slow light in semiconductor multiple quantum wells

Abstract

We report an experimental demonstration of electromagnetically induced transparency in the transient optical response in a cascade-type three-level system of GaAs/AlGaAs multiple quantum wells, and analyze the cascade-type three-level schemes with density matrix and Maxwell equations to then obtain the phase shift, group velocity, and group-velocity dispersion. The calculated group velocity is ∼6.87 × 10 4 m/s and the corresponding pulse delay is ∼7 ps. Finally, we provide a convenient basis for investigating many-body effects in semiconductors.

Giant parabolic nonlinearities at infrared in Λ-type three level multiple quantum wells

“…Meanwhile, from we find that the linear susceptibility changes from negative to positive with the enhancement of the control field indicating the change in group velocity from anomalous dispersion region to normal dispersion region. Thus far what we have discussed in this section is reported earlier and well understood [8,9].…”

“…In recent years electromagnetically induced transparency (EIT) and its related effects have been studied extensively both theoretically as well as experimentally in gases and semiconductor quantum wells [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Such keen interest is due to their potential applications covering enhancement of nonlinear optical processes [10], quantum coherent control [11], quantum information processing and transmission [11][12][13][14][15].…”

All-optical switching based on the electromagnetically induced transparency effect of an active photonic crystal microcavity

“…Through the previous studies of Yan et al [18][19][20], we know that the single exciton and biexciton states in semiconductor multiple quantum wells (MQWs) can form a Ξ-type three-level structure. EIT can be realized in a three-level system where a control beam drives 1s-exciton states to biexciton (or two-exciton continuum) transition and sets up a destructive interference for a weak probe beam coupling to the |g>→1s-exciton state transition (see Figure 1(a)).…”

Giant quintic nonlinearities at slow light level in semiconductor quantum wells

“…In recent years, great interests have been found towards both theoretical as well as experimental investigations on giant nonlinear susceptibilities of atomic systems and semiconductor quantum wells (SQW) with reducing, especially with vanishing linear absorption facilitated by a quantum interference effect known as electromagnetically induced transparency (EIT) [2,3]. It is well known that EIT can be used to slowdown a light pulse in a dispersive media, sometimes even bring them to a complete stop [4,5].…”