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

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 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.

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

Nonlinear Absorption and Nonlinear Refraction of Self-Assembled Porphyrins

2006 ◽  
Vol 110 (31) ◽  
pp. 15140-15145 ◽  
Author(s):  
Zhi-Bo Liu ◽  
Yi-Zhou Zhu ◽  
Yan Zhu ◽  
Shu-Qi Chen ◽  
Jian-Yu Zheng ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Self Assembled

SYNTHESIS, CHARACTERIZATION AND SINGLE-BEAM Z-SCAN MEASUREMENT OF THE THIRD-ORDER OPTICAL NONLINEARITIES OF ZnO NANO-PARTICLES

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3165-3171 ◽  
Author(s):  
M. H. MAJLES ARA ◽  
Z. DEHGHANI ◽  
S. SAIEVAR IRANIZAD
Keyword(s):  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Average Particle Size ◽  
Nonlinear Absorption Coefficient ◽  
Nano Particles ◽  
Average Particle ◽  
Optical Nonlinearities ◽  
Nano Particle ◽  
Uv Visible

Nano-particle materials with large optical nonlinearities are in great need for the development of nonlinear optical technology and are being studied intensively in recent years. ZnO nanoparticles have been synthesized by precipitation from zinc acetate in a series of n-alkanols from ethanol to 1-hexanol as a function of temperature. The formation and microstructure of ZnO particles were monitored by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectrum and z-scan technique. We studied the optical limiting effect of ZnO nano-particles. Using a CW He - Ne laser at 632.8 nm. The UV-Visible spectrum of this material shows a 373.5 nm peak. Using the UV-Visible, the band gap of this nano-particle is obtained about 3.31 eV. Also the XRD spectroscopy indicates that the structure is wurtzite hexagonal. Average particle size obtained from SEM analysis about 43nm. Furthermore the nonlinear refractive index, n 2, and nonlinear absorption coefficient, β, were measured using close and open aperture z-scan respectively, at peak laser irradiation of 1.743 kW/cm2. Then the nonlinear refraction index of this nano-particle was measured in order of 10-7 (cm2/W) with negative sign and the nonlinear absorption coefficient was obtained in order of 10-3 (cm/W).

Accurate determination of nonlinear refraction and nonlinear absorption by a single Z-scan method

2004 ◽  
Vol 21 (2) ◽  
pp. 349 ◽  
Author(s):  
Wei-Ping Zang ◽  
Jian-Guo Tian ◽  
Zhi-Bo Liu ◽  
Wen-Yuan Zhou ◽  
Feng Song ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Accurate Determination ◽  
Nonlinear Refraction

Linear and nonlinear optical properties of WO3 nanoparticles synthesized at different fluences of pulsed Nd:YAG laser

2018 ◽  
Vol 84 (3) ◽  
pp. 30401 ◽  
Author(s):  
Majid Fakhari ◽  
Mohammad Javad Torkamany ◽  
Seyed Noureddin Mirnia
Keyword(s):  
Particle Size ◽  
Nd:Yag Laser ◽  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Average Particle Size ◽  
Visible Region ◽  
Nonlinear Susceptibility ◽  
Average Particle ◽  
Optical Parameters ◽  
Laser Fluences

Here in this paper, synthesis of WO3 nanoparticles (NPs) by laser ablation of a pure tungsten plate immersed in water is reported. For this purpose, the first harmonic of an acousto-optically Q-Switched Nd:YAG laser is utilized at 13, 18 and 23 J/cm2 laser fluences. X-ray diffraction (XRD) and transmission electron microscopy (TEM) associated with dynamic light scattering (DLS) techniques show that while the laser fluence increases from 13 to 23 J/cm2, the crystallinity, length of particle chains and average particle size of the products increase, respectively. UV–Vis spectra indicate a red shift on the absorption edge towards the visible region for the samples produced at higher laser fluences attributed to the particle size increment and energy band gap decrement, subsequently. Also other linear optical parameters including Urbach energy, refractive index dispersion, relaxation time, complex dielectric and conductivity functions are derived and discussed. Z-scan analysis is carried out to determine the nonlinear refraction index, nonlinear absorption coefficient and third-order nonlinear susceptibility. It is found that WO3 NPs can be considered for optical limiting performance because of the high nonlinear absorption. Furthermore, the specimens prepared at higher laser fluences are more applicable due to the larger particle size and higher nonlinear absorption, consequently.

Intense low threshold nonlinear absorption and nonlinear refraction in a new organic–polymer nanocomposite

2011 ◽  
Vol 129 (3) ◽  
pp. 981-989 ◽  
Author(s):  
P.G. Louie Frobel ◽  
S.R. Suresh ◽  
S. Mayadevi ◽  
S. Sreeja ◽  
Chandrachur Mukherjee ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Polymer Nanocomposite ◽  
Organic Polymer ◽  
Low Threshold

Nonlinear absorption and nonlinear refraction in HgCdTe

1990 ◽  
Author(s):  
Shekhar Guha ◽  
Stephen P. Buchner ◽  
Keith Kang ◽  
C. Freter ◽  
Wen P. Chen
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction
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