Ultrafast optical nonlinearity of low-temperature-grown GaInAs/AlInAs quantum wells at wavelengths around 1.55 μm

被引:25
作者
Biermann, K [1 ]
Nickel, D
Reimann, K
Woerner, M
Elsaesser, T
Künzel, H
机构
[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany
[2] Heinrich Hertz Inst Nachrichtentech Berlin GmbH, D-10587 Berlin, Germany
关键词
D O I
10.1063/1.1461429
中图分类号
O59 [应用物理学];
学科分类号
摘要
The ultrafast optical response of low-temperature-grown GaInAs/AlInAs multiple quantum wells is studied in pump-probe experiments with a femtosecond Er:fiber laser. As-grown samples doped with beryllium (concentration of 8x10(17) cm(-3)) display a nonlinear transmission change, which decays by carrier trapping with a time constant of 230 fs. Experiments with pairs of ultrashort pulses separated by 1.5 ps demonstrate a fast modulation of transmission and very small accumulation effects, making this material highly promising for all-optical switching. Substantially longer recovery times are found in annealed, Be-doped samples and in undoped samples. (C) 2002 American Institute of Physics.
引用
收藏
页码:1936 / 1938
页数:3
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