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1.55-μm picosecond all-optical switching by using intersubband absorption in InGaAs-AlAs-AlAsSb coupled quantum wells

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6 Author(s)
Akiyama, T. ; Femtosecond Technol. Res. Assoc., Tsukuba, Japan ; Georgiev, N. ; Mozume, T. ; Yoshida, H.
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We report on the first all-optical switching operation of intersubband absorption at an optical communication wavelength (/spl sim/1.55 μm). The 1.55-μm intersubband absorption was achieved by InGaAs-AlAs-AlAsSb coupled quantum wells. A switching operation on an ultrafast signal (equivalent to 1 THz) was successfully demonstrated with a control pulse energy as low as 27 pJ.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 4 )