scholarly journals Measurement of the third order optical nonlinearities of graphene quantum dots in water at 355 nm, 532 nm and 1064 nm

2019 ◽  
Vol 9 (2) ◽  
pp. 339 ◽  
Author(s):  
Hongzhen Wang ◽  
Charles Ciret ◽  
Christophe Cassagne ◽  
Georges Boudebs
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Optical Nonlinearities ◽  
Third Order ◽  
The Third ◽  
532 Nm

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.

Preparation and the third-order optical nonlinearities of the sodium borosilicate glass doped with Cu7.2S4 quantum dots

2012 ◽  
Vol 358 (18-19) ◽  
pp. 2641-2649 ◽  
Author(s):  
Weidong Xiang ◽  
Haijun Zhao ◽  
Jiasong Zhong ◽  
Yuqing Guo ◽  
Zhaoping Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Borosilicate Glass ◽  
Optical Nonlinearities ◽  
Sodium Borosilicate Glass ◽  
Third Order ◽  
The Third

scholarly journals Electronic properties and third-order optical nonlinearities in tetragonal chalcopyrite AgInS2, AgInS2/ZnS and cubic spinel AgIn5S8, AgIn5S8/ZnS quantum dots

2017 ◽  
Vol 5 (1) ◽  
pp. 149-158 ◽  
Author(s):  
Bartłomiej Cichy ◽  
Dominika Wawrzynczyk ◽  
Marek Samoc ◽  
Wiesław Stręk
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Electronic Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Optical Nonlinearities ◽  
Third Order

Electronic as well as third-order nonlinear optical properties of chalcopyrite AgInS2 and non-stoichiometric spinel AgIn5S8 quantum dots compared with corresponding Zn2+ alloyed compounds are presented in this work.

Investigation of the third-order nonlinear optical properties in porphyrin solutions in the picosecond regime

2015 ◽  
Vol 24 (03) ◽  
pp. 1550030 ◽  
Author(s):  
M. Chniti ◽  
C. Cassagne ◽  
J. L. Godet ◽  
G. Boudebs
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Time Dependence ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Spectral Width ◽  
Incident Laser ◽  
Third Order ◽  
The Third ◽  
532 Nm

The D4σ-Z-scan technique is used to evaluate the sign and the magnitude of the nonlinear (NL) refractive index and the NL absorption (NLA) coefficient with a laser delivering single pulses in the picosecond regime at 355 nm, 532 nm and 1064 nm. The NL optical response of the zinc porphyrins (Pph) has been found to be significantly enhanced. The study of the NLA and refraction is performed, taking into account the time dependence and the spectral width of the incident laser. The variations of the NL coefficients as a function of the intensity and the concentration are provided and are found to be linear.

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