Phase control of three-dimensional spatial distribution of probe absorption in quantum well nanostructures

This study investigates the influence of standing wave fields on the 3D absorption profiles of a quantum well (QW) system based on biexciton coherence, focusing on the effects of relative phase, detuning, and different light-matter interaction schemes. We derive the conditional position probability distribution of probe absorption, elucidating how variations in phase and detuning can manipulate spatial localization patterns. Distinct absorption patterns are observed, with a maximum detection probability of 25% in defined subspaces. Further analysis reveals that adjusting the relative phase of the applied fields leads to significant reconfigurations of the absorption maxima, enhancing spatial confinement and predictability of the quantum system’s position. Additionally, we explore the impact of detuning, demonstrating that manipulating detuning narrows absorption volumes, reduces positional uncertainty, and achieves up to 100% detection probability in specific regions. These findings underscore the critical role of quantum interference effects arising from standing-wave fields, which generate spatially varying Rabi frequencies and dictate the modulation of probe absorption. The results provide valuable insights into the control of light-matter interactions, with implications for quantum information processing and precision measurement applications.