I-scan measurements of the nonlinear refraction and nonlinear absorption coefficients of some nanomaterials

2003 ◽  
Author(s):  
Qiguang Yang ◽  
JaeTae Seo ◽  
Santiel J. Creekmore ◽  
Doyle A. Temple ◽  
K. P. Yoo ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Absorption Coefficients

scholarly journals Study of Nonlinear Refraction and Nonlinear Absorption Coefficients of Different CdS Film Thickness by diode laser

2013 ◽  
Vol 10 (1) ◽  
pp. 217-225 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Diode Laser ◽  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Michelson Interferometer ◽  
Photon Absorption ◽  
Absorption Coefficients ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Cds Film ◽  
Transmission Test

In the present work, different thicknesses of CdS film were prepared by chemical bath deposition. Z-Scan technique was used to study the nonlinear refractive index and nonlinear absorption coefficients. Linear optical testing were done such as transmission test, and thickness of films were done by the interference fringes (Michelson interferometer). Z-scan experiment was performed at 650nm using CW diode laser and at 532nm wavelength. The results show the effect of self-focusing and defocusing that corresponds with nonlinear refraction n2. The effect of two-photon absorption was also studied, which correspond to the nonlinear absorption coefficient B.

scholarly journals Nonlinear absorption and nonlinear refraction: maximizing the merit factors

2012 ◽  
Author(s):  
M. Samoc ◽  
K. Matczyszyn ◽  
M. Nyk ◽  
J. Olesiak-Banska ◽  
D. Wawrzynczyk ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction

scholarly journals Interaction of Pulses of Different Duration with Chemically Prepared Silver Nanoparticles: Analysis of Optical Nonlinearities

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Ke Zhang ◽  
Rashid A. Ganeev ◽  
Konda Srinivasa Rao ◽  
Sandeep Kumar Maurya ◽  
Ganjaboy S. Boltaev ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Nonlinear Refraction ◽  
Optical Nonlinearities ◽  
Chemical Reduction Method ◽  
Ag Nps ◽  
Picosecond Pulses

The nonlinear optical properties of the aqueous solutions of silver nanoparticles (Ag NPs) prepared by chemical reduction method are analyzed using femtosecond and picosecond pulses at different wavelengths. In the case of 800 and 400 nm, the growths of nonlinear absorption and nonlinear refraction with the increase of Ag NP concentration, as well as a change at the signs of nonlinear optical processes, are determined. The nonlinear absorption coefficient and nonlinear refractive index of Ag NP solutions measured using picosecond pulses were a few orders of magnitude larger than those in the case of femtosecond probe pulses. We also demonstrate the optical limiting properties of Ag NPs using 800 nm, 60 fs pulses.

Z-scan theoretical model for simultaneous n- and (n+1)-photon absorption

2019 ◽  
Vol 28 (03) ◽  
pp. 1950022
Author(s):  
Ferhat Kessi ◽  
Naima Hamadouche
Keyword(s):  
Theoretical Model ◽  
Nonlinear Absorption ◽  
Photon Absorption ◽  
Closed Form Expression ◽  
Absorption Coefficients ◽  
Form Expression ◽  
Linear Absorption ◽  
Thin Sample ◽  
Open Formula ◽  
Simultaneous Identification

We present a theoretical analysis of multi-photon absorption processes. We find an approximate closed-form expression of the normalized transmittance for a thin sample with two successive nonlinear absorption processes at a time ([Formula: see text]- and [Formula: see text]-photon absorption) in the presence of residual linear absorption. Our approach allows for simultaneous identification and evaluation of the nonlinear absorption coefficients and Rayleigh lengths of the incident elliptic Gaussian beam by fitting the open [Formula: see text]-scan traces.

Peaks separation of the nonlinear refraction and nonlinear absorption induced by external electric field

2006 ◽  
Vol 88 (11) ◽  
pp. 111911 ◽  
Author(s):  
Dongyi Guan ◽  
Zhenghao Chen ◽  
Yueliang Zhou ◽  
Kui-Juan Jin ◽  
Guozhen Yang
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Nonlinear Absorption ◽  
Nonlinear Refraction

Large Nonlinear Refractive Indices of Nickel Dithiolene Doped Polymethylmethacrylate

1992 ◽  
Vol 247 ◽  
Author(s):  
Christopher S. Winter ◽  
S. N. Oliver ◽  
C A. S. Hill
Keyword(s):  
Refractive Index ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Refractive Indices ◽  
Absorption Coefficients ◽  
Figures Of Merit ◽  
Linear And Nonlinear

ABSTRACTThe nonlinear refractive index, linear and nonlinear absorption coefficients of a number of nickel dithiolene-doped PMMA polymers have been measured. Nonlinear refractive indices up to about 10−8 cm−2/KW were observed, with figures of merit defined by δnsat/αλ and Reχ(3) / Im χ(3) within acceptable device limits.

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