Energy-Transfer Processes in Oxygen-Codoped GaAs:Er

Author:

Takahei K.,Hogg R. A.,Taguchi A.

Abstract

AbstractGaAs grown by metalorganic chemical vapor deposition and codoped with Er and oxygen shows a simple spectrum with sharp luminescence lines due predominantly to one type of Er center. This center is identified as an Er atom substituting a Ga site, coupled with two oxygen atoms. Photoluminescence measurements under host excitation and photoluminescence excitation measurements that directly excite the 4f-shell of the Er3+ ion indicate that this center is excited much more efficiently than other Er centers simultaneously present in the same sample. A possible energy-transfer mechanism and its implications are discussed.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

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