Optical Spectra and Stokes Shift in Nanometric Quantum Wells

• 作者: Antonio A. P. Silva Aurea R. Vasconcellos Eliermes A. Meneses Roberto Luzzi
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: HETEROSTRUCTURES Non-Conventional Statistical MECHANICS STOKES SHIFT
• 年，卷（期）: 2013,（6）
• 页码范围: 1-4
• 页数: 4页
• 分类号: R73

摘要

We consider semiconductor heterostructures in nanometric quantum wells, which as a consequence of the growth process display at the rugged interfaces fractal characteristics, and largely influence optical and transport properties of the carriers system. The photoluminescence and excited photoluminescence spectra in such fractal conditions are theoretically analyzed, obtaining good agreement with the experimental results. The Stokes shift and linewidth are strongly dependent on the nonequilibrium thermomechanical-statistical state of the system. The Stokes shift has its origin in the presence of a gain region in the absorption spectrum, only present when the carriers system is in a statistical degenerate state.