Ultrafast all-optical switching at 1.55 μm using an organic multilayer device

Tatsuura, Satoshi; Matsubara, Takashi; Tian, Minquan; Mitsu, Hiroyuki; Iwasa, Izumi; Sato, Yasuhiro; Furuki, Makoto
July 2004
Applied Physics Letters;7/26/2004, Vol. 85 Issue 4, p540
Academic Journal
We report ultrafast all-optical switching at optical communication wavelength using a device with a layered structure containing organic films. Spin-coated layers of di(benzofuranonyl)methanolate (BM) derivative are formed alternately with vacuum evaporated layers of germanium (II) oxide. An optical Kerr shutter is constructed using this BM multilayer with 1.55 μm signal and 1.63 μm gate pulses of 100 fs time durations. As a result, optical switching with signal-to-noise ratio over 20 dB is attained at gate-pulse intensity above 30 pJ/μm2 and a response time comparable to pulse width is observed. The BM multilayer could be an efficient optical communication device for parallel data processing.


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