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 language | English |
|---|---|
| Pages (from-to) | 808-813 |
| Number of pages | 6 |
| Journal | Journal of Luminescence |
| Volume | 192 |
| DOIs | |
| Publication status | Published - 2017 Dec 1 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Quantum number dependence of the photoluminescence broadening of excitonic Rydberg states in cuprous oxide
AU - Kitamura, Tatsuya
AU - Takahata, Mitsuyoshi
AU - Naka, Nobuko
PY - 2017/12/1
Y1 - 2017/12/1
N2 - 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.
AB - 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.
KW - Excitonic Rydberg states
KW - Line broadening
KW - Photoluminescence
UR - http://www.scopus.com/inward/record.url?scp=85027407223&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027407223&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2017.07.060
DO - 10.1016/j.jlumin.2017.07.060
M3 - Article
AN - SCOPUS:85027407223
VL - 192
SP - 808
EP - 813
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -