Nonlinear Optical Absorption and Related Phenomena in Liquid Crystals

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

New Journal of Chemistry ◽

10.1039/c8nj06402d ◽

2019 ◽

Vol 43 (21) ◽

pp. 7962-7971 ◽

Cited By ~ 5

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.

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Nonlinear optical absorption in mixtures of dye molecules and ZnS nanoparticles

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s021886351750045x ◽

2017 ◽

Vol 26 (04) ◽

pp. 1750045 ◽

Cited By ~ 6

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.

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Large Nonlinear Optical Absorption Response in Monolayer Graphene and Graphene Oxide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.510.768 ◽

2012 ◽

Vol 510 ◽

pp. 768-771 ◽

Cited By ~ 1

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.

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