Ultrafast field-polarization dynamics in an optically pumped semiconductor microcavity laser

E. Blansett, D. McAlister, M. Raymer
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Abstract

Summary form only given. The polarization properties of vertical cavity surface emitting lasers (VCSEL) originate in the change of electron total angular momentum J/sub z/ projected along the vertical axis for transitions from the conduction to the valence band. For quantum wells, J/sub z/=/spl plusmn/1/2 for the conduction band, and J/sub z/=/spl plusmn/3/2 for the heavy hole valence band, the highest energy valence band in unstrained quantum wells. The dipole allowed transitions are between J/sub z/=-1/2 and J/sub z/=-3/2 producing right circularly polarized light and between J/sub z/=+1/2 and J/sub z/=+3/2 producing left circularly polarized light. In CW, electrically pumped VCSELs, polarization states and fluctuations are well described by a model based on these transitions (San Miguel et al, 1995). We are investigating the polarization properties of VCSELs optically pumped with ultrashort pulses (<1 ps) which allows us to control the relative population of the angular momentum states and monitor the development of the intensity, noise, and correlations of the polarized-modes as a function of time.
光泵浦半导体微腔激光器的超快场偏振动力学
只提供摘要形式。垂直腔面发射激光器(VCSEL)的极化特性源于电子总角动量J/sub z/沿垂直轴投影的变化,从导带跃迁到价带。对于量子阱,J/sub z/=/spl plusmn/1/2为导带,J/sub z/=/spl plusmn/3/2为重空穴价带,即非应变量子阱中最高能价带。偶极子允许跃迁在J/sub z/=-1/2和J/sub z/=-3/2之间产生右圆偏振光,在J/sub z/=+1/2和J/sub z/=+3/2之间产生左圆偏振光。在连续波中,电泵浦vcsel,极化状态和波动可以用基于这些跃迁的模型很好地描述(San Miguel et al, 1995)。我们正在研究超短脉冲(<1 ps)光泵浦VCSELs的偏振特性,这使我们能够控制角动量状态的相对数量,并监测偏振模式的强度、噪声和相关性随时间的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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