Exploring electro-optic effect and third-order nonlinear optical susceptibility of impurity doped quantum dots: Interplay between hydrostatic pressure, temperature and noise

2017 ◽  
Vol 387 ◽  
pp. 166-173 ◽  
Author(s):  
Jayanta Ganguly ◽  
Surajit Saha ◽  
Aindrila Bera ◽  
Manas Ghosh
Keyword(s):  
Quantum Dots ◽  
Hydrostatic Pressure ◽  
Nonlinear Optical ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
Optical Susceptibility ◽  
Electro Optic ◽  
Doped Quantum Dots ◽  
Impurity Doped

scholarly journals Nonlinear Refractive Index in Rectangular Graphene Quantum Dots

2019 ◽  
Vol 9 (2) ◽  
pp. 325 ◽  
Author(s):  
Yonggang Qin ◽  
Xiaobo Feng ◽  
Yu Liu
Keyword(s):  
Quantum Dots ◽  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Nonlinear Optical ◽  
Graphene Quantum Dots ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Optical Susceptibility ◽  
Wall Boundary Conditions

Alongside its other favorable properties, the large refraction nonlinearity of graphene-related material makes it ideal for use in optoelectronics applications. Numerous experimental studies about nonlinear optical refraction have been conducted, but theoretical verification is lacking. In this paper the nonlinear refractive index for rectangular graphene quantum dots (RGQDs) was calculated using the relationship between nonlinear refractive index and the third-order nonlinear optical susceptibility. The third-order nonlinear optical susceptibility for third harmonic generation was derived employing the electronic states obtained from the Dirac equation around K point in RGQDs under hard wall boundary conditions. Results revealed that the calculated nonlinear refractive index, n 2 , was in the magnitude of 10−14 m2/W in the visible region, which is nearly five orders larger than conventional semiconductor quantum dots, while in the infrared region the nonlinear refractive index reached up to the magnitude of 10−11 m2/W for M = 3M0 sized RGQDs where the resonance enhancement occurred. The nonlinear refractive index could be tuned both by the edges and sizes.

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