Direct evidence of trap-mediated excitation in GaN:Er3+ with a two-color experiment - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2008

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

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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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Dates and versions

cea-00348676 , version 1 (19-12-2008)

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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, 2008, 93, pp.151107. ⟨cea-00348676⟩
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