NOVEL ALL-OPTICAL 10 MU-M WAVE-GUIDE MODULATOR BASED ON INTERSUBBAND ABSORPTION IN GAAS ALGAAS QUANTUM-WELLS

被引:24
作者
JULIEN, FH [1 ]
VAGOS, P [1 ]
LOURTIOZ, JM [1 ]
YANG, DD [1 ]
PLANEL, R [1 ]
机构
[1] CNRS,CNET,SCI GRP,F-92220 BAGNEUX,FRANCE
关键词
D O I
10.1063/1.105925
中图分类号
O59 [应用物理学];
学科分类号
摘要
Efficient all-optical modulation of mid-infrared radiations based on photoinduced intersubband absorption of a GaAs/AlGaAs multiquantum well structure is demonstrated at room temperature. The sample-designed for mid-infrared waveguiding was grown by molecular beam epitaxy. A double-resonance spectroscopy of both interband and intersubband transitions of the quantum wells is presented. The intersubband resonance is found at 9.56-mu-m. An AlGaAs laser diode is used to optically pump the quantum wells. On/off modulation ratios as high as 150:1 are obtained with only 45 mW pump power and for mid-infrared input powers up to 0.5 W. The frequency bandwidth of the device is presently comparable to that of acousto-optic modulators available at mid-infrared wavelengths.
引用
收藏
页码:2645 / 2647
页数:3
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