Ultrafast all-optical refractive index modulation in intersubband transition switch using InGaAs/AlAs/AlAsSb quantum well

被引：0
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作者：
Ishikawa, Hiroshi [1 ]
Tsuchida, Hidemi [1 ]
Abedin, Kazi Sarwar [2 ]
Simoyama, Takasi [1 ]
Mozume, Teruo [1 ]
Nagase, Masanori [1 ]
Akimoto, Ryoichi [1 ]
Miyazaki, Tetsuya [2 ]
Hasama, Toshifumi [1 ]
机构：
[1] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
[2] National Institute of Information and Communications Technology (NICT), Koganei, Tokyo 184-8795, Japan
来源：
Japanese Journal of Applied Physics, Part 2: Letters | 2007年 / 46卷 / 8-11期
关键词：
Large; very fast phase modulation was observed in transverse electric (TE) probe light when an intersubband transition (ISBT) switch module using an InGaAs/AlAs/AlAsSb quantum well was pumped by transverse magnetic (TM) light. The phase shift amounted to 1.88 rad for a pump pulse energy of 4 pJ (fiber input); with very fast response. This phenomenon is explained by the change in plasma dispersion caused by the redistribution of electrons among subbands having different effective masses. This phase modulation will enable us to realize various novel ultrafast all-optical devices for signal processing. © 2007 The Japan Society of Applied Physics;
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