Evidence of an off-center position of thulium in GaAs and excitonic excitation of the Tm3+ emission
Dörnen, A. ; Haase, D. ; Hiller, C. ; Pressel, K. ; Weber, J. ; Scholz, F.
[S.l.] : American Institute of Physics (AIP)
Published 1993
[S.l.] : American Institute of Physics (AIP)
Published 1993
| ISSN: |
1089-7550
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
By photoluminescence and by Zeeman spectroscopy we study the characteristic 4f luminescence transition 3H5 → 3H6 at 1.0 eV of thulium in gallium arsenide which has been reported recently. It turns out that optically active Tm3+, which is present in mainly one specific type of center, does not occupy a simple substitutional lattice site. The results show a considerable tetragonal crystal field. The excitation mechanism of the 1.0-eV luminescence is investigated by photoluminescence excitation. The 3H5 → 3H6 is pumped most efficiently by trapping of free excitons.
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| Type of Medium: |
Electronic Resource
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| URL: |