All-optical switching and flip-flop based on dynamically controlled bistability in a V-type atomic system

2019 ◽  
Vol 36 (7) ◽  
pp. 1799 ◽  
Author(s):  
Ya-Nan Li ◽  
Yu-Yuan Chen ◽  
Ren-Gang Wan
Keyword(s):  
Optical Switching ◽  
Atomic System ◽  
Flip Flop ◽  
All Optical ◽  
All Optical Switching

Switching on or off the optical bistability based on the interaction of double dark resonances

2017 ◽  
Vol 31 (01) ◽  
pp. 1650245
Author(s):  
Xiang-An Yan ◽  
Li-Qiang Wang ◽  
Wei-Wei Zhang ◽  
Yao-Wu Liu ◽  
Han-Chen Liu
Keyword(s):  
Optical Switching ◽  
Optical Bistability ◽  
Microwave Field ◽  
Atomic System ◽  
Ring Cavity ◽  
Threshold Intensity ◽  
Bistable Behavior ◽  
Text Type ◽  
All Optical ◽  
All Optical Switching

We investigated the optical bistability (OB), which is manipulated by double dark resonances, in a [Formula: see text]-type four-level atomic system with a unidirectional ring cavity. It is found that, with the interaction of double dark resonances, the bistable threshold intensity becomes weaker and the hysteresis loop becomes narrower by tuning properly the detuning of microwave field. Also, the influence of the intensity and frequency detuning of the microwave field on switching on or off the optical bistable behavior is studied, which is used to provide the theoretical guidance for controlling and optimizing all optical switching process. Our numerical results are explained by using a dressed-state approach.

All-optical switching and storage in a four-level tripod-type atomic system

2006 ◽  
Vol 268 (1) ◽  
pp. 146-154 ◽  
Author(s):  
M.A. Antón ◽  
Oscar G. Calderón ◽  
Sonia Melle ◽  
I. Gonzalo ◽  
F. Carreño
Keyword(s):  
Optical Switching ◽  
Atomic System ◽  
All Optical ◽  
And Storage ◽  
All Optical Switching

scholarly journals On-Chip All-Optical Switching and Memory by Silicon Photonic Crystal Nanocavities

2008 ◽  
Vol 2008 ◽  
pp. 1-10 ◽  
Author(s):  
Masaya Notomi ◽  
Takasumi Tanabe ◽  
Akihiko Shinya ◽  
Eiichi Kuramochi ◽  
Hideaki Taniyama
Keyword(s):  
Photonic Crystal ◽  
Optical Switching ◽  
Photon Absorption ◽  
Nonlinear Material ◽  
Optical Logic ◽  
Flip Flop ◽  
Silicon Photonic ◽  
All Optical ◽  
On Chip ◽  
All Optical Switching

We review our recent studies on all-optical switching and memory operations based on thermo-optic and carrier-plasma nonlinearities both induced by two-photon absorption in silicon photonic crystal nanocavities. Owing to high-Q and small volume of these photonic crystal cavities, we have demonstrated that the switching power can be largely reduced. In addition, we demonstrate that the switching time is also reduced in nanocavity devices because of their short diffusion time. These features are important for all-optical nonlinear processing in silicon photonics technologies, since silicon is not an efficient optical nonlinear material. We discuss the effect of the carrier diffusion process in our devices, and demonstrate improvement in terms of the response speed by employing ion-implantation process. Finally, we show that coupled bistable devices lead to all-optical logic, such as flip-flop operation. These results indicate that a nanocavity-based photonic crystal platform on a silicon chip may be a promising candidate for future on-chip all-optical information processing in a largely integrated fashion.

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