Charged and neutral biexcitonexciton cascade in a single quantum dot within a photonic bandgap

M. Shirane, Y. Igarashi, Y. Ota, M. Nomura, N. Kumagai, S. Ohkouchi, A. Kirihara, S. Ishida, S. Iwamoto, S. Yorozu, Y. Arakawa

研究成果: Article査読

6 被引用数 (Scopus)

抄録

We investigate the recombination dynamics of positively charged and neutral biexcitons and excitons in a single InAs/GaAs quantum dot (QD) within a two-dimensional (2D) photonic bandgap (PBG). The 2D PBG makes the exciton lifetime four times longer and enhances photon-extraction efficiency compared to those without the PBG. Photon cross-correlation measurements demonstrate the cascade emissions of both charged and neutral biexcitonsexcitons from the same QD. In the charged case, a hole in the p-shell relaxes into the s-shell between the cascade, and the corresponding transition is confirmed based on the spin configuration. The long exciton lifetime with the PBG helps us to reveal the spin dynamics that did not clearly appear in intrinsic QDs.

本文言語English
ページ(範囲)2563-2566
ページ数4
ジャーナルPhysica E: Low-Dimensional Systems and Nanostructures
42
10
DOI
出版ステータスPublished - 2010 9月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学

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