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

被引：33

作者：

Ishikawa, Hiroshi ^{[1
]}

Tsuchida, Hidemi

Abedin, Kazi Sarwar

Simoyama, Takasi

Mozume, Teruo

Nagase, Masanori

Akimoto, Ryoichi

Miyazaki, Tetsuya

Hasama, Toshifumi

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, Tsukuba, Ibaraki 3058568, Japan

[2] Natl Inst Informat & Commun Technol, NICT, Koganei, Tokyo 1848795, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 8-11期

关键词：

intersubband transition; quantum well; phase modulation; refractive index; band nonparabolicity; effective mass;

D O I：

10.1143/JJAP.46.L157

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large very fast phase modulation was observed in transverse electric (TE) probe light when an intersubband transition (ISBT) switch module using an InGaAs/AIAs/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.

引用

页码：L157 / L160

页数：4

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