<Research Reports>Spectroscopic study on Rydberg excitons

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  • <研究ノート>リュードベリ励起子の分光研究
  • リュードベリ励起子の分光研究
  • リュードベリ レイキシ ノ ブンコウ ケンキュウ

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Abstract

A Rydberg exciton is a Coulomb-bound pair of an electron and a hole excited to a large principal quantum number n, analogous to a Rydberg atom. This highly excited state in solid potentially has exaggerated properties, such as a large Bohr radius, long-range interaction, and high sensitivity to environment, which are relevant to quantum technology applications. An oxide semiconductor Cu2O recently receives particular interest owing to the giant Rydberg excitons observed up to n = 25. In this article, we introduce our photoluminescence studies, which elucidated how these Rydberg excitons are generated, non-radiatively annihilated, and radiatively recombine when they are confined into mesoscopic dimensions.

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