Simultaneous observation of single- and two-photon excitation photoluminescence on optically quenched wide-gap semiconductor crystals

Noor, A. S. M.; Torizawa, M.; Miyakawa, A.; Kawata, Y.
October 2008
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p171107
Academic Journal
Simultaneous detection of a quenched wide-gap semiconductor crystal is observed using single- and two-photon excitation photoluminescence. The quenching process involved two-photon excitation method induced defects to the crystal. It was found that the quenched area, photoluminescence at the bandgap wavelength is detected using single-photon excitation while no photoluminescence is observed from two-photon excitation. This is due to the damage occurred to the transition states of the two-photon excitation. The dependency of respective excitation methods with photoluminescence was elaborated to confirm the single- and two-photon excitation photoluminescence methods.


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