Efficient electroabsorption for mid-infrared wavelengths using intersubband transitions

被引：0
|
作者：
Holmstrom, P. [1 ]
Janes, P. [3 ]
Ekenberg, U. [2 ]
Thylen, L. [2 ]
机构：
[1] Sophia Univ, Dept Elect & Elect Engn, Tokyo 1028554, Japan
[2] Royal Inst Technol KTH, Dept Microelect & Appl Phys, SE-16440 Kista, Sweden
[3] Proximion Fiber Syst AB, SE-16440 Kista, Sweden
来源：
PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY | 2008年 / 100卷
基金：
瑞典研究理事会;
关键词：
D O I：
10.1088/1742-6596/100/4/042009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have demonstrated efficient intersubband (IS) electroabsorption in InGaAs/InAlGaAs/InAlAs step quantum wells grown by metal-organic vapor phase epitaxy (MOVPE). An absorption modulation of 2300 cm(-1) at lambda=5.7 mu m due to Stark shift of the IS resonance was achieved with a low applied voltage swing of +/-0.5 V in a multipass waveguide structure. Two useful wavelength ranges of lambda approximate to 5.4-5.8 mu m and 6.3-6.6 mu m were obtained by considering the two flanks of the IS resonance. Based on the experimental results it is estimated that an electroabsorption modulator with a low peak-to-peak voltage of V-PP = 0.9 V can yield a modulation speed of f(3dB) = 120 GHz with the present material by using a strongly confining surface plasmon waveguide of 30 mu m length.
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页数：4
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