Studies of the third-order nonlinear optical susceptibility for InxGa1−xN/GaN cylinder quantum dots

2005 ◽  
Vol 25 (4) ◽  
pp. 466-471 ◽  
Author(s):  
Liming Liu ◽  
Junjie Li ◽  
Guiguang Xiong
Keyword(s):  
Quantum Dots ◽  
Nonlinear Optical ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Optical Susceptibility

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.

Binding energy and the third-order nonlinear optical susceptibility of an exciton in GaAs/AlGaAs core/shell spherical quantum dot

2018 ◽  
Vol 47 (4) ◽  
pp. 445-455 ◽  
Author(s):  
Zhi-Hai Zhang ◽  
Jun Sheng Li ◽  
Jian Tang ◽  
Liang Liang Yang ◽  
Kang-Xian Guo ◽  
...  
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Nonlinear Optical ◽  
Core Shell ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Spherical Quantum Dot ◽  
Optical Susceptibility

WEAK FIELD NONLINEAR OPTICAL RESPONSE OF FERMIONS IN FRENKEL EXCITON CHAINS

1992 ◽  
Vol 06 (21) ◽  
pp. 3441-3467 ◽  
Author(s):  
FRANK C. SPANO
Keyword(s):  
Nonlinear Optical ◽  
Optical Response ◽  
Weak Field ◽  
Nonlinear Optical Response ◽  
Electronic Excitations ◽  
Third Order ◽  
Nonlinear Optical Susceptibility ◽  
The Third ◽  
Optical Susceptibility ◽  
Site Disorder

In this paper the third order nonlinear optical response of a Frenkel chain composed of N dipole-dipole coupled two-level molecules is reviewed. The fundamental electronic excitations of such a system are, in fact, fermions, a property which greatly simplifies the eigenspectrum for multiexciton states. The introduction of site disorder does not disrupt the fermion nature and is therefore easily incorporated into a general expression of the third order nonlinear optical susceptibility.

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