Terahertz modulation of the blue photoluminescence in ZnSe
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, NL-1018 XE Amsterdam (Netherlands)
We report on effective optical modulation of blue PL in ZnSe with a powerful pulse from a free-electron laser operating in the THz range. A 30% resonant quenching is observed for a quantum energy E{sub FEL}{approx_equal}107 meV. This resonant feature is replicated at higher photon energies, with several equidistant maxima separated by 33 meV. We identify the PL emission quenching with ionization of shallow acceptor states participating in the donor-acceptor pair recombination responsible for the blue emission. The possibility of Fano-resonances occurring in this system are discussed. Such resonances can appear due to strong coupling between shallow acceptor states and longitudinal phonons.
- OSTI ID:
- 20719543
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 12 Vol. 72; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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