Coherence and recombination dynamics of excitons in nanostructures: towards excitonics

纳米结构中激子的相干和复合动力学：走向激子学

• 批准号: 36947-2013
• 负责人: Leonelli, Richard
• 金额: $ 1.53万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=544784
• 关键词: Coherence; recombination; dynamics; excitons; nanostructures

When a semiconductor absorbs a photon, an electron is excited to the conduction band, leaving a hole in the valence band. The Coulomb interaction between electrons and holes results in a bound state, the exciton, which controls to a large extent the optical properties of semiconductors. When the semiconductors are structured on a nanometric scale, the exciton optical response is dramatically altered by quantum confinement, localization and delocalization processes, exchange interaction and other many-body effects.

当半导体吸收光子时，电子被激发到导带，在价带中留下空穴。电子和空穴之间的库仑相互作用导致束缚态，即激子，它在很大程度上控制着半导体的光学性质。当半导体在纳米尺度上结构化时，激子光学响应通过量子限制、局域化和离域过程、交换相互作用和其他多体效应而显著改变。