Nonlocal optical response of weakly confined excitons in Cu2 O mesoscopic films

Mitsuyoshi Takahata, Koichiro Tanaka, Nobuko Naka

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We have demonstrated size-dependent radiative coupling in a Cu2O mesoscopic film, where the spatial matching between the center-of-mass exciton motion and light waves plays an essential role. The observed quadratic increase and oscillation of the photoluminescence intensity with varying film thicknesses (16-1000 nm) indicate a nonlocal response that is unique to mesoscopic systems. Optimally, a 104-fold enhanced radiative rate was found compared with bulk Cu2O. A new degree of freedom in the light-matter interaction is presented, which differs from the mode volume control in cavity quantum electrodynamics.

本文言語English
論文番号205305
ジャーナルPhysical Review B
97
20
DOI
出版ステータスPublished - 2018 5月 24
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
  • 凝縮系物理学

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