Abstract
The various decay mechanisms of excitons in cuprous oxide (Cu2O) are highly sensitive to defects which can relax selection rules. Here we report cryogenic hyperspectral imaging of exciton luminescence from cuprous oxide crystals grown via the floating zone method showing that the samples have few defects. Some locations, however, show strain splitting of the 1s orthoexciton triplet polariton luminescence. Strain is reduced by annealing. In addition, annealing causes annihilation of oxygen and copper vacancies, which leads to a negative correlation between luminescence of unlike vacancies.
Original language | English (US) |
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Pages (from-to) | 294-302 |
Number of pages | 9 |
Journal | Journal of Luminescence |
Volume | 159 |
DOIs | |
State | Published - Mar 2015 |
Keywords
- CuO
- Cuprous oxide
- Excitons
- Hyperspectral imaging
- Stress
- Vacancies
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Chemistry(all)
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics