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Spectroscopy of intraband optical transitions in anisotropic semiconductor nanocrystals

机译：各向异性半导体纳米晶体中的带内光学跃迁的光谱学

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摘要

We propose a new type of optical spectroscopy of anisotropic semiconductor nanocrystals, which is based on the well-developed stationary pump-probe technique, where the pump and probe fields are absorbed upon, respectively, interband and intraband transitions of the nanocrystals' electronic subsystem. We develop a general theory of intraband absorption based on the density matrix formalism. This theory can be applied to study degenerate eigenstates of electrons in semiconductor nanocrystals of different shapes and dimentions. We demonstrate that the angular dependence of intraband absorption by nonspherical nanocrystals enables investigating their shape and orientation, as well as the symmetry of quantum states excited by the probe field and selection rules of electronic transitions.
机译：我们提出了一种新型的各向异性半导体纳米晶体的光谱学，该光谱学是基于成熟的固定泵浦探针技术的，其中泵浦和探针场分别吸收了纳米晶体电子子系统的带内和带内跃迁。我们基于密度矩阵形式主义开发了带内吸收的一般理论。该理论可用于研究不同形状和尺寸的半导体纳米晶体中电子的简并本征态。我们证明非球形纳米晶体的带内吸收的角度依赖性使得能够研究它们的形状和方向，以及由探针场和电子跃迁选择规则激发的量子态的对称性。

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  • 来源
    《Nanophotonic materials X》|2013年|88070U.1-88070U.9|共9页
  • 会议地点 San Diego CA(US)
  • 作者

    Vadim K. Turkov; Anvar S. Baimuratov; Ivan D. Rukhlenko; Alexander V. Baranov; Anatoly V. Fedorov;

  • 作者单位

    National Research University of Information Technologies, Mechanics and Optics, 197101, 49 Kronverkskiy Pr., Saint Petersburg, Russia;

    National Research University of Information Technologies, Mechanics and Optics, 197101, 49 Kronverkskiy Pr., Saint Petersburg, Russia;

    Advanced Computing and Simulation Laboratory, Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton 3800, Victoria, Australia;

    National Research University of Information Technologies, Mechanics and Optics, 197101, 49 Kronverkskiy Pr., Saint Petersburg, Russia;

    National Research University of Information Technologies, Mechanics and Optics, 197101, 49 Kronverkskiy Pr., Saint Petersburg, Russia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanocrystals; intraband absorption; pump-probe technique; polarization spectroscopy;

    机译：纳米晶体；带内吸收；泵浦探针技术；偏振光谱;

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