期刊
APPLIED PHYSICS EXPRESS
卷 2, 期 8, 页码 -出版社
JAPAN SOCIETY APPLIED PHYSICS
DOI: 10.1143/APEX.2.082001
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资金
- Japan Society for the Promotion of Science (JSPS)
Using time-resolved optical measurements, a strong, ultrafast optical Kerr signal was demonstrated in a GaAs/AlAs multilayer cavity containing self-assembled InAs quantum dots (QDs) embedded in strain-relaxed InGaAs barrier layers. The large optical nonlinearity of the resonant InAs QDs in the half wavelength (lambda/2) cavity layer is further enhanced by the strong cavity effect. Although only two layers of InAs QDs were inserted in the lambda/2 layer, the optical Kerr signal intensity was 60 times larger than that of a GaAs lambda/2 cavity. The response time of the optical Kerr signal was less than 1 ps, which was much faster than the decay time (15 ps) of optically generated carriers in the InAs QDs. (C) 2009 The Japan Society of Applied Physics
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