Intensity-invariant subpicosecond absorption saturation in heavy-ion irradiated bulk GaAs

Intensity-invariant subpicosecond absorption saturation in heavy-ion irradiated bulk GaAs

We demonstrate that bulk GaAs irradiated by heavy Au+ ions shows efficient saturable absorption with subpicosecond recovery time and without any relaxation rate saturation up to excitation densities as high as 1.6 mJ/cm2. A comparison with other types of ion irradiation shows that heavy-ion-irradiat...

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Veröffentlicht in:Applied physics letters 1998-12, Vol.73 (25), p.3715-3717
Hauptverfasser: Stelmakh, N., Mangeney, J., Alexandrou, A., Portnoi, E. L.
Format: Artikel
Sprache:eng
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Zusammenfassung:We demonstrate that bulk GaAs irradiated by heavy Au+ ions shows efficient saturable absorption with subpicosecond recovery time and without any relaxation rate saturation up to excitation densities as high as 1.6 mJ/cm2. A comparison with other types of ion irradiation shows that heavy-ion-irradiated GaAs is a very promising material for ultrafast optoelectronics and optical processing at high repetition rates.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.122873