期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 15, 期 10, 页码 1363-1365出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2003.818045
关键词
absorption saturation; coupled double quantum well (C-DQW); intersubband transition (ISB-T)
We report a novel intersubband transition all-optical switch with low switching energy using InGaAs-AlAs-AlAsSb coupled double quantum wells (C-DQWs) with AlAs spacer layers. Very low saturation energy density of 34 fJ/mum(2) was observed for bulk transmittance with wavelength of 1.62 mum. Using a waveguide, whose core is 93 periods of the C-DQWs, an all optical switch with a low switching energy of 10 pJ for 10-dB extinction ratio was realized.
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