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.

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.

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 mixtures of dye molecules and ZnS nanoparticles

2017 ◽  
Vol 26 (04) ◽  
pp. 1750045 ◽  
Author(s):  
G. S. Boltaev ◽  
B. R. Sobirov ◽  
T. Usmanov ◽  
M. S. Smirnov ◽  
O. V. Ovchinnikov ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Zinc Sulfide ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Pyridinium Salt ◽  
Dye Molecules ◽  
Absorption Coefficients ◽  
Zns Nanoparticles ◽  
Nonlinear Optical Absorption ◽  
Nm Range

The nonlinear absorption in the mixtures of zinc sulfide quantum dot and some dyes are studied. The nonlinear absorption coefficients of the ZnS nanoparticles associated with various heterocyclic dyes [thiazine (thionine), xanthene (erythrosine), and carbocyanine (3,3[Formula: see text]-di-([Formula: see text]-sulfopropyl)-4,4[Formula: see text],5,5[Formula: see text]-dibenzo-9-ethylthiacarbocyaninebetaine pyridinium salt, DEC)] possessing optical absorption in the 500–680[Formula: see text]nm range were measured at the wavelengths of 1064[Formula: see text]nm and 532[Formula: see text]nm using 40 ps pulses and [Formula: see text]-scan technique.

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

Large Nonlinear Optical Absorption Response in Monolayer Graphene and Graphene Oxide

2012 ◽  
Vol 510 ◽  
pp. 768-771 ◽  
Author(s):  
Yang Fan ◽  
Zhi Guo Jiang ◽  
Lu Feng Yao
Keyword(s):  
Experimental Data ◽  
Graphene Oxide ◽  
Optical Absorption ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Monolayer Graphene ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Incident Intensity ◽  
Nonlinear Optical Absorption

Nonlinear absorption of monolayer graphene and graphene oxide suspensions were studied in the wavelength of 800 nm by Z-scan method with 50fs pulses. Large reverse saturable absorption is observed in graphene, while graphene oxide shows saturable absorption at the incident intensity of 46 GW/cm2. The values of nonlinear absorption coefficient also have been determined from the experimental data. The NLA coefficient β of the monolayer graphene suspension is 1.96×10-2cm/GW,while the NLA coeffiecient β of graphene oxide is-6.84×10-3cm/GW.

Nonlinear Optical Absorption in the AgOx-Type Super-Resolution Near-Field Structure

2001 ◽  
Vol 40 (Part 1, No. 6A) ◽  
pp. 4101-4102 ◽  
Author(s):  
Fu Han Ho ◽  
Wei Yi Lin ◽  
Hsun Hao Chang ◽  
Yu Hsaun Lin ◽  
Wei-Chih Liu ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Nonlinear Optical ◽  
Near Field ◽  
Super Resolution ◽  
Field Structure ◽  
Nonlinear Optical Absorption
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