Intensity favored switching of nonlinear optical absorption mechanism in silver nanoparticles under nanosecond pulsed laser excitation

2019 ◽  
Author(s):  
Sharafudeen Kaniyarakkal Naduvil Valappil ◽  
Siji Narendran N. K. ◽  
Shiju E. ◽  
Vijayakumar S ◽  
Chandrasekharan Keloth
Keyword(s):  
Silver Nanoparticles ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Absorption Mechanism ◽  
Nonlinear Optical Absorption ◽  
Nanosecond Pulsed Laser

Broadband Optical Limiting and CCD Sensor Protection From Nanosecond-Pulsed Laser Threat With Reverse Saturable Absorbers

1997 ◽  
Vol 479 ◽  
Author(s):  
V. Dentan ◽  
P. Feneyrou ◽  
F. Soyer ◽  
M. Vergnolle ◽  
P. Le Barny ◽  
...  
Keyword(s):  
Excited States ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Pulsed Laser ◽  
Saturable Absorbers ◽  
Nanosecond Pulsed Laser ◽  
Optical Limiter ◽  
Linear And Nonlinear ◽  
Ccd Arrays ◽  
Pulsed Laser Irradiation

AbstractWe study in detail the linear and nonlinear optical properties of a heavy metal substituted naphthalocyanine reverse saturable absorber (RSA). The excited states involved in the RSA process under nanosecond pulsed laser excitation in the visible are fully characterized. We then demonstrate that this material can be used as an efficient optical limiter for protecting silicium CCD arrays from destruction due to nanosecond-pulsed laser irradiation in the visible.

scholarly journals Nonlinear optical absorption of non-spherical silver nanoparticles and organic dyes mixtures

2018 ◽  
Vol 190 ◽  
pp. 04016
Author(s):  
Andrey I. Zvyagin ◽  
Aleksey S. Perepelitsa ◽  
Mariya S. Lavlinskaya ◽  
Oleg V. Ovchinnikov ◽  
Mikhail S. Smirnov ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Photochemical Degradation ◽  
Ag Nps ◽  
Nonlinear Optical Absorption

We study the features of the nonlinear optical response of silver nanoparticles (Ag NPs) of spherical and triangular shapes synthesized using a citrate-borohydride approach and their mixtures with methylene blue (MB+). The Z-scans at the wavelengths of 532 nm using 10 ns pulses were used to analyze the nonlinear optical absorption of MB+ solutions, Ag NPs of different morphology, particularly, the concurrence of saturable and reverse saturable absorption in the solution of triangular Ag NP and MB+. We show the significant contribution to the increasing in the normalized transmittance accomplished by photochemical degradation of the non-spherical Ag NPs (extinction maximum of 600 nm) and transformation into the spherical ones (extinction maximum of 400 nm). The nonlinear light scattering is also analyzed, which showed the contribution to the variation of the sample transmission when it approaches the focal plane. It is shown that the nonlinear optical response is not additive in the mixture of Ag NPs and MB+. The increasing of the nonlinear absorption is probably due to both a change in the population of the triplet states of the dye and the efficiency of photochemical degradation of NPs in the presence of MB+.

Nonlinear Optical Absorption in GaSe upon Laser Excitation

2020 ◽  
Vol 128 (4) ◽  
pp. 501-504
Author(s):  
V. M. Salmanov ◽  
A. G. Guseinov ◽  
R. M. Mamedov ◽  
A. A. Salmanova ◽  
N. D. Dashdamirova
Keyword(s):  
Optical Absorption ◽  
Nonlinear Optical ◽  
Laser Excitation ◽  
Nonlinear Optical Absorption

A phenothiazine–silver hybrid system exhibiting switching and photo-induced enhancement in nonlinear optical absorption

2019 ◽  
Vol 43 (21) ◽  
pp. 7962-7971 ◽  
Author(s):  
Shiju E. ◽  
Siji Narendran N. K. ◽  
Narayana Rao D. ◽  
Chandrasekharan K.
Keyword(s):  
Silver Nanoparticles ◽  
Optical Absorption ◽  
Hybrid System ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Nonlinear Optical Absorption

A novel photo-responsive hybrid system made of phenothiazine and silver nanoparticles showing enhanced nonlinear absorption and switching.

Demonstration of variation of the nonlinear optical absorption of non-spherical silver nanoparticles

Optik ◽  
2018 ◽  
Vol 175 ◽  
pp. 93-98 ◽  
Author(s):  
A.I. Zvyagin ◽  
A.S. Perepelitsa ◽  
M.S. Lavlinskaya ◽  
O.V. Ovchinnikov ◽  
M.S. Smirnov ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Absorption ◽  
Nonlinear Optical ◽  
Nonlinear Optical Absorption

Nonlinear Optical Absorption and Related Phenomena in Liquid Crystals

2001 ◽  
Vol 709 ◽  
Author(s):  
N.V. Tabiryan ◽  
U.A. Hrozhyk ◽  
H.L. Margaryan ◽  
M.J. Mora ◽  
S.R. Nersisyan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Optical Absorption ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Isotropic Phase ◽  
Nonlinear Optical Absorption ◽  
Critical Opalescence ◽  
Application Potential ◽  
Large Application

SUMMARYThus, in the present paper, we reported about several processes of nonlinear absorption and transmission in dye-doped NLC: nonlinear absorption due to light induced reorientation of NLC doped by highly dichroic dyes; nonlinear transmission due to nonlinear birefringence, and self-extinguishing of the beam due to”critical opalescence,” critically enhanced light scattering at the pre-transition region of nematic-isotropic phase transition. All these processes have large application potential for laser beam control and characterization techniques.

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