近日，德国萨尔大学Arindam Kumar Chatterjee团队研究了多量子阱中非高斯脉冲的隧道机制自相位调制。相关论文于2025年7月31日发表在《物理评论A》杂志上。

课题组研究了非对称多量子阱系统中自相位调制（SPM）在隧道诱导透明（TIT）窗口内诱导的cosh高斯脉冲的谱展宽。他们演示了单个激光场如何与稳定的静电场相结合，使系统的吸收和色散曲线能够动态控制，从而精确控制应用场的群速度。多量子阱系统表现出较大的Kerr非线性（约10⁶ W^-1 m^-1），增强了TIT窗口下的SPM效应。

研究组对SPM主题cosh-Gathemsian脉冲的探索表明，更高的探测激光功率导致更宽的光谱宽度和增加的内部振荡，特别是在强隧道强度下。这些结果表明了在量子阱系统中微调光传播的有前景的应用，并为光学光-物质相互作用实验提供了一种更经济的方法，最大限度地减少了对广泛的光学和光机械组件的需求。

附：英文原文

Title: Self-phase-modulation of non-Gaussian pulses in multiple quantum wells by a tunneling mechanism

Author: Rohit Mukherjee, Nitu Borgohain, Rohit Hazra, Kingshuk Bose, Arindam Kumar Chatterjee

Issue&Volume: 2025/07/31

Abstract: In this article, we investigate the spectral broadening of cosh-Gaussian pulses which is induced by self-phase modulation (SPM) within the tunneling-induced transparency (TIT) window in an asymmetric multiple-quantum-well system. The study demonstrates how a single laser field, combined with a steady static electric field, enables dynamic control of absorption and dispersion profiles of the system, offering precise control of the group velocity of the applied field. The multiple-quantum-well system exhibits a large Kerr nonlinearity (approximately 106W1m1), which enhances the SPM effect under the TIT window. Our exploration of SPM using cosh-Gaussian pulses demonstrates that higher probe laser powers result in broader spectral widths and increased internal oscillations, especially under strong tunneling strengths. These results suggest promising applications for fine-tuning light propagation in quantum-well systems and offer a more economical approach for optical light-matter interaction experiments, minimizing the need for extensive optics and optomechanical components.

DOI: 10.1103/8vqj-rvsh

Source: https://journals.aps.org/pra/abstract/10.1103/8vqj-rvsh