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Direct evidence of trap-mediated excitation in GaN:Er3+ with a two-color experiment

Abstract : We report a direct confirmation of the generally proposed rare-earth excitation model in GaN. The intermediate step involving the formation of excitons bound to rare-earth ions prior to the rare-earth excitation is demonstrated. Using a two-color experiment, we show that the erbium photoluminescence decay following a pulsed laser excitation is quenched when an additional continuous-wave (cw) laser is applied. As the two beams excite the sample, the cw beam perturbs the intermediate step of the Er excitation mechanism either by photoionization of Er-related trapped carriers or by inducing an Auger effect between the trapped carriers and free carriers.
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https://hal-cea.archives-ouvertes.fr/cea-00348676
Contributor : Chantal Brassy <>
Submitted on : Friday, December 19, 2008 - 7:02:27 PM
Last modification on : Thursday, February 7, 2019 - 5:31:29 PM

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  • HAL Id : cea-00348676, version 1

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Loic Bodiou, Alain Braud. Direct evidence of trap-mediated excitation in GaN:Er3+ with a two-color experiment. Applied Physics Letters, American Institute of Physics, 2008, 93, pp.151107. ⟨cea-00348676⟩

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