2D spatial distribution of probe absorption in a triple semiconductor quantum well nanostructure

Abstract

We investigate the two-dimensional (2D) position-dependent probe absorption in a triple semiconductor quantum well (SQW) structure driven coherently by two orthogonal standingwave fields. Under weak probe field approximation and utilizing the density matrix approach, an analytical solution is presented for the probe linear susceptibility which clarifies directly the spatial-dependent nature of the probe absorption. Then, the distribution of probe absorption in 2D is numerically explored. It is found that 2D absorption spectra are very sensitive to the intensity and frequency detuning of standing-wave fields which can result in various 2D localization structures in one period of standing waves in the x-y plane.

Localization in quantum systems with broken parities

“…During the past few years, intersubband transitions in quantum wells have attracted tremendous attention, mainly due to the promise of various applications in the mid-and far-infrared regions. In particular, coherent control of a position-dependent probe absorption spectrum in SQWs, utilizing standing-wave fields, has been the subject of many studies [37][38][39][40][41][42][43]. In these works, the behavior of the localization effect is explored by monitoring the excitonic population distribution of the upper state or the probe absorption, which can be easily controlled by adjusting system parameters.…”

Identifying orbital angular momentum of light in quantum wells

“…optical coherence and interference effects, have been extended to SQWs. Some of these interesting and impressive phenomena are gain without inversion [28], electro magnetically induced transparency (EIT) [29,30], enhanced index of refraction [31][32][33], optical soliton [34], and spatial distribution of probe absorption [35]. In addition to these schemes, the relative phase of applied fields is considered as a method for controlling quantum coherent and quantum interference in atomic [36][37][38], molecular [39], and solid-state systems [40,41].…”

Coherent control of parametric generation of laser beams via intersubband transitions in quantum wells

“…The ability to manipulate these transitions through EIT provides a promising avenue for improving the performance and efficiency of optical devices. Moreover, the interaction of solid-state nanostructures with positiondependent beams presents an intriguing avenue for exploration [36][37][38][39][40][41][42][43][44][45][46]. The interplay between these localized optical beams and semiconductor nanostructures leads to diverse modifications in light-matter interactions.…”