scholarly journals Theoretical Investigation of All Optical Switching by Intersystem Crossing

2019 ◽  
Vol 10 (1) ◽  
pp. 128
Author(s):  
Yuhao Zou ◽  
Haiwei Wang ◽  
Haozhe Huang ◽  
Zhihao Zeng ◽  
Kai Wang ◽  
...  
Keyword(s):  
Decay Rate ◽  
Optical Switching ◽  
Intersystem Crossing ◽  
Spin States ◽  
Magnetic Orientation ◽  
Incident Laser ◽  
Rabi Model ◽  
All Optical ◽  
Spin Flips ◽  
All Optical Switching

The dynamics of spin flips induced by the femtosecond laser are theoretically investigated in this article. The spin flips in this scenario are attributed to the intersystem crossing (ISC) described within the frame of the Rabi model. This new explanation is a step attempting to explain the mechanism of the all-optical magnetic orientation switching in the perspective of the conservation of the angular momentum and breaks of the selection rule, which is ignored in the Raman scattering related explanations. The final spin states discussed herein are closely related to the intensity of the incident laser and the ISC decay rate. The quantitative analysis of the relation between decay rate, temperature and the intensity of the laser is discussed.

LASER INDUCED NONLINEAR OPTICAL RESPONSE OF CARBON NANOTUBES DEPOSITED ON A DIELECTRIC SUBSTRATE

2013 ◽  
Vol 22 ◽  
pp. 686-693
Author(s):  
SHIVANGI BISSA ◽  
PREETI NARUKA
Keyword(s):  
Carbon Nanotubes ◽  
Optical Switching ◽  
Nonlinear Response ◽  
Effective Medium Theory ◽  
Dielectric Substrate ◽  
Dielectric Constants ◽  
Incident Laser ◽  
Medium Theory ◽  
All Optical ◽  
All Optical Switching

In the present paper, the nonlinear response of carbon nanotubes has been investigated by using the dielectric constants of these nanotubes evaluated by using the Maxwell-Garnett Effective Medium Theory. SWNT’s deposited on the tip of a dielectric substrate show a drastic change in reflectance and transmittance of the incident laser light due to change in their nonlinearity and optical constants. This property may be further used for developing all-optical switching devices.

Third‐order optical nonlinearity and all‐optical switching in porous silicon

1995 ◽  
Vol 67 (3) ◽  
pp. 323-325 ◽  
Author(s):  
Fryad Z. Henari ◽  
Kai Morgenstern ◽  
Werner J. Blau ◽  
Vladimir A. Karavanskii ◽  
Vladimir S. Dneprovskii
Keyword(s):  
Porous Silicon ◽  
Optical Switching ◽  
Optical Nonlinearity ◽  
Third Order ◽  
All Optical ◽  
All Optical Switching
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