Size dependence of biexciton binding energy in single InAs/GaAs quantum dots

• 来源期刊: 中国物理B（英文版）
• 关键词: biexcition binding energy single quantum dots exciton molecular model HeitlerLondon method
• 年，卷（期）: 2009,（6）
• 页码范围: 2258-2263
• 页数: 6页
• 语种: 英文

摘要

This paper studies the size dependence of biexciton binding energy in single quantum dots (QDs) by using atomic force microscopy and micro-photoluminescence measurements. It finds that the biexciton binding energies in the QDs show "binding" and "antibinding" properties which correspond to the large and small sizes of QDs, respectively. The experimental results can be well interpreted by the biexciton potential curve, calculated from the exciton molecular model and the Heitler-London method.