Design of Low-Loss Surface-Plasmon Quantum Cascade Lasers
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概要
- 論文の詳細を見る
A low-loss waveguide design for the mid-infrared surface-plasmon quantum cascade lasers (QCLs) is proposed. A waveguide loss of 6.5–8 cm-1 with a confinement factor above 50% is obtained by modulating the doping concentration and thickness of the In0.53Ga0.47As (InGaAs) contact layer to around $1.3\times 10^{19}$ cm-3 and 100 nm. The overlapping of lasing mode with the highly lossy surface plasmons is therefore substantially reduced. The delocalizing the lasing mode profile to the substrate improves the far field angle of the lasing beam in the epilayer direction with a reduction about 25°.
- 2009-12-25
著者
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ZHANG Wei
Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and
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Gao Yu
Key Laboratory Of Solar Activity National Astronomical Observatories Chinese Academy Of Sciences
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Wang Li-Jun
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Lu Quan-Yong
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Yin Wen
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Zhang Quan-De
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Liu Wan-Feng
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Liu Feng-Qi
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Wang Zhan-Guo
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Zhang Wei
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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Gao Yu
Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083, China
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