We demonstrate, for the first time to our knowledge, optical bistability on a highly integrated silicon device, using a 5μm-radius ring resonator. The strong light-confinement nature of the resonator induces nonlinear optical response with low pump power. We show that the optical bistability allows all-optical functionalities, such as switching and memory with microsecond time response and a modulation depth of 10 dB, driven by pump power as low as 45 μW. Silicon optical bistability relies on a fast thermal nonlinear optical effect presenting a 500-kHz modulation bandwidth.
© 2004 Optical Society of America
(130.3120) Integrated optics : Integrated optics devices
(130.4310) Integrated optics : Nonlinear
(190.1450) Nonlinear optics : Bistability
(230.1150) Optical devices : All-optical devices
(230.3120) Optical devices : Integrated optics devices
Vilson R. Almeida and Michal Lipson, "Optical bistability on a silicon chip," Opt. Lett. 29, 2387-2389 (2004)