COMPLETE BLEACHING OF THE INTERSUBBAND ABSORPTION IN GAAS/ALGAAS QUANTUM-WELLS USING A FAR-INFRARED FREE-ELECTRON LASER

被引：23

作者：

HELM, M

FROMHERZ, T

MURDIN, BN

PIDGEON, CR

GEERINCK, KK

HOVENYER, NJ

WENCKEBACH, WT

VANDERMEER, AFG

VANAMERSFOORT, PW

机构：

[1] HERIOT WATT UNIV,DEPT PHYS,EDINBURGH EH14 4AS,MIDLOTHIAN,SCOTLAND

[2] UNIV TECHNOL DELFT,FAC APPL PHYS,2600 GA DELFT,NETHERLANDS

[3] FOM,INST PLASMA PHYS,3439 MN NIEUWEGEIN,NETHERLANDS

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 24期

关键词：

D O I：

10.1063/1.110185

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The intensity-dependent intersubband absorption in GaAs/AlGaAs quantum wells with a subband separation smaller than the optical phonon energy has been measured with a pulsed far-infrared free-electron laser. Complete bleaching of the absorption is observed at I = 200 kW/cm2. Fitting the data with a two-level system yields a characteristic time constant of 1-2 ps. Possible interpretations, considering the finite pulse width of the laser, are discussed.

引用

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页码：3315 / 3317

页数：3

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