Quantum number dependence of the photoluminescence broadening of excitonic Rydberg states in cuprous oxide

Tatsuya Kitamura, Mitsuyoshi Takahata, Nobuko Naka

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report the first observation of photoluminescence from excitonic Rydberg states with quantum number n up to 7 in Cu2O. We find that the luminescence linewidths increase at elevated temperatures and under increased laser power, and that the effect is more pronounced for a state with a larger n. The temperature dependence is attributed to scattering by longitudinal-optical phonons, whereas the density dependence is explained by the binary collisions of excitons in the ground (n=1) and excited (n≥2) Rydberg states. The n-dependent broadening is discussed on the basis of the overlap of wave functions and collision cross sections determined by the Bohr radius of Rydberg excitons.

Original languageEnglish
Pages (from-to)808-813
Number of pages6
JournalJournal of Luminescence
Volume192
DOIs
Publication statusPublished - 2017 Dec 1
Externally publishedYes

Fingerprint

Rydberg states
quantum numbers
Photoluminescence
Phonons
excitons
photoluminescence
Temperature
collisions
oxides
Wave functions
Luminescence
Linewidth
phonons
Lasers
Observation
wave functions
Scattering
luminescence
temperature dependence
radii

Keywords

  • Excitonic Rydberg states
  • Line broadening
  • Photoluminescence

ASJC Scopus subject areas

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics

Cite this

Quantum number dependence of the photoluminescence broadening of excitonic Rydberg states in cuprous oxide. / Kitamura, Tatsuya; Takahata, Mitsuyoshi; Naka, Nobuko.

In: Journal of Luminescence, Vol. 192, 01.12.2017, p. 808-813.

Research output: Contribution to journalArticle

Kitamura, Tatsuya ; Takahata, Mitsuyoshi ; Naka, Nobuko. / Quantum number dependence of the photoluminescence broadening of excitonic Rydberg states in cuprous oxide. In: Journal of Luminescence. 2017 ; Vol. 192. pp. 808-813.
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