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Threshold effect in optical limiters based on conjugates J-type phthalocyanine dimers Zn and Mg with single-walled carbon nanotubes
Author(s): Mikhail S. Savelyev; Alexander Yu. Gerasimenko; Artem V. Kuksin; Vitaly M. Podgaetsky; Alexander Yu. Tolbin; Pavel N. Vasilevsky; Sergey A. Tereschenko
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Paper Abstract

Laser radiation limiters can be made on the basis of working substances, which have strong nonlinear effects after reaching a certain critical value (threshold limiting). Thus, it becomes possible to obtain a high transmission for a safe beam and a sharply reduced transmission for a hazardous beam. To determine the nonlinear and linear optical properties of these materials there were carried out comprehensive spectroscopic studies, experiments by Z-scan methods with an open aperture and a fixed location of the limiter. Working substances was developed which is suspension of conjugates J-type phthalocyanine dimers Zn or Mg with single-walled carbon nanotubes (SWCNTs) in water. Created conjugates can be used not only for protecting eyes and light-sensitivity elements, but for forming three-dimensional tissueengineered structures. Using conjugates J-type phthalocyanine dimers Zn and Mg with SWCNTs will increase the optical absorption in the wavelength range of laser processing by reducing the thermal effect on other substances in the composition of this structure. The Nd:YAG laser was used as the laser radiation source for generating pulses of 16 ns duration at a wavelength of 532 nm with the linearly polarized laser beam in the horizontal plane and a shape of Gaussian type. The threshold of limiting, linear and nonlinear absorption coefficients were determined by output characteristic, that was obtained by fixed location of the limiter. Created working substances have values of the following order: linear absorption coefficient ~ 3 cm-1 for layer of 0.2 cm thickness, low limiting threshold ~ 1 MW·cm-2 and high value of the nonlinear absorption coefficient ~ 550 cm GW-1 . Knowing the nonlinear optical parameters, Z-scan data with an open aperture can be calculated for comparison with experimental data.

Paper Details

Date Published: 14 May 2018
PDF: 6 pages
Proc. SPIE 10684, Nonlinear Optics and its Applications 2018, 106841X (14 May 2018); doi: 10.1117/12.2306845
Show Author Affiliations
Mikhail S. Savelyev, National Research Univ. of Electronic Technology (Russian Federation)
I.M. Sechenov First Moscow State Medical Univ. (Russian Federation)
Alexander Yu. Gerasimenko, National Research Univ. of Electronic Technology (Russian Federation)
I.M. Sechenov First Moscow State Medical Univ. (Russian Federation)
Artem V. Kuksin, National Research Univ. of Electronic Technology (Russian Federation)
Vitaly M. Podgaetsky, National Research Univ. of Electronic Technology (Russian Federation)
Alexander Yu. Tolbin, Institute of Physiologically Active Compounds (Russian Federation)
Pavel N. Vasilevsky, National Research Univ. of Electronic Technology (Russian Federation)
Sergey A. Tereschenko, National Research Univ. of Electronic Technology (Russian Federation)


Published in SPIE Proceedings Vol. 10684:
Nonlinear Optics and its Applications 2018
Benjamin J. Eggleton; Neil G. R. Broderick; Anna C. Peacock, Editor(s)

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