Type

Journal Article

Authors

John Francis Donegan

Subjects

Physics

Topics
physics observation excited states rare earth ii vi semiconductors energy transfer doped semiconductors low temperature

Observation of nonradiative energy transfer in the excitation of Nd3+ in GaP (1990)

Abstract We have carried out luminescence-excitation measurements on a Nd3+ complex in GaP in the range 1.5?2.2 eV to determine the mechanisms by which the internal Nd3+ luminescence is generated. At low temperatures we observe transitions into the 4S3/2 and 4F7/2 excited states of Nd3+ and two broad excitation bands whose integrated intensities are orders of magnitude greater than that of the Nd3+ excited states. These broadbands demonstrate for the first time that nonradiative energy transfer from external states is the dominant low-temperature mechanism for the excitation of Nd3+ luminescence in GaP. Reasonable assignments have been made for the origin of the broadbands on the basis of similar work carried out on rare-earth-doped II-VI semiconductors.
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Full list of authors on original publication

John Francis Donegan

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John Francis Donegan
Trinity College Dublin
Total Publications: 152