Enhanced Kerr nonlinearity in a tunnel-coupled double quantum wells

Controllable Kerr Nonlinearity via Incoherent Pump Fields in Semiconductor Quantum Wells

“…[34], but our scheme is much more practical than its counterpart. First, we could achieve an enhanced Kerr nonlinearity via the strength od Fano-type interference, and without applying any coherent control field, which is completely different from what we discussed in our previous work [19]. Second, the incoherent pumping field is used to control the Kerr nonlinearity.…”

“…Two interesting nonlinear optical phenomenon, which has been studied in the recent years in the atomic media are Kerr nonlinearity [10,11,12,13]and optical bistability [14,15,16,17]. It is shown that a large Kerr nonlinearity with reduced probe absorption causes the nonlinear optics to be studied at low light power [18,19]. In fact, it is desirable to have large third-order susceptibilities under conditions of low light power and high sensitivities, since it can be used for realization of single-photon nonlinear devices.…”

“…Thus, a significant decrease of the multi-stable threshold can be achieved. Besides atomic systems, Optical bistability (OB) and Optical multi-stability (OM) as well as Kerr nonlinearity have been studied in other kinds of systems, such as semiconductor structures [19,32,33,34]. One of the most interesting solid state medium is semiconductor quantum well (SQW).…”

“…Quantum wells have more capability to provide high nonlinear optical coefficient and large electric-dipole moments. Recently, we (with collaborators) investigate an enhanced Kerr nonlinearity in a four subbund tunnel-coupled double quantum wells [19]. It is found that the energy splitting of the two upper levels and intensity of coupling field can enhance the Kerr nonlinearity and reduced the linear and nonlinear absorption.…”

Dynamical and Steady State Processes of Probe Absorption-Dispersion in a Four-Level Quantum Dot Nanostructure

“…Experimental observations of interference between three-photon and one-photon excitations, and phase control of light attenuation in a four-level atomic system have been reported [14]. Similar phenomena based on the quantum interference and coherence in semiconductor quantum wells (SQWs) and quantum dots (QDs) have also been extensively studied in recent years [15][16][17][18][19][20][21][22][23]. The theory of quantum coherence phenomena in SQDs was introduced by Chow et al on the basis of earlier studies [24][25][26].…”