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2 November 2023 Size effects and improved optical limiting efficiency for carbon nanotube composites with a tetra(cyclotriphosphazene)-substituted phthalocyanine ligand
Mikhail S. Savelyev, Pavel N. Vasilevsky, Alexander Yu. Gerasimenko, Alexander Yu. Tolbin, Sergey V. Selishchev
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Proceedings Volume 12920, XVI International Conference on Pulsed Lasers and Laser Applications; 1292015 (2023) https://doi.org/10.1117/12.3009345
Event: XVI International Conference on Pulsed Lasers and Laser Applications, 2023, Tomsk, Russian Federation
Abstract
Dangerous high-power laser radiation has been used in technology for many decades, capable of damaging CCD and CMOS matrices (used in video cameras and lidars), as well as causing irreparable damage to the organs of vision. Damage occurs at a high-energy fluence density above a certain threshold value. The main disadvantages of the passive protection devices used – light filters – are color distortion and a narrow wavelength range that requires an accurate value of the wavelength of laser radiation that falls on a photosensitive material or device. The operation of a nonlinear optical limiter of laser radiation power for passive protection is based on the use of a material with a strong nonlinear optical response. However, existing materials do not have the low energy dimming threshold required for practice and, moreover, have insufficiently effective optical attenuation. Further improvement of these characteristics is necessary, although the results already achieved at the moment may well be used in practice. A nonlinear absorption coefficient was used to evaluate the effect of optical limiting. As a result of the studies carried out in this work on the example of composites of single walled carbon nanotubes with a tetra(cyclotriphosphazene)-substituted phthalocyanine ligand, we found that depending on the hydrodynamic radius of fine particles, the efficiency of optical limiting can increase by an order of magnitude. At the same time, the efficiency of optical limiting of composites is more than 2 times higher compared to the original nanotubes.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Mikhail S. Savelyev, Pavel N. Vasilevsky, Alexander Yu. Gerasimenko, Alexander Yu. Tolbin, and Sergey V. Selishchev "Size effects and improved optical limiting efficiency for carbon nanotube composites with a tetra(cyclotriphosphazene)-substituted phthalocyanine ligand", Proc. SPIE 12920, XVI International Conference on Pulsed Lasers and Laser Applications, 1292015 (2 November 2023); https://doi.org/10.1117/12.3009345
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KEYWORDS
Optical limiting
Composites
Laser radiation
Carbon nanotubes
Particles
CCD cameras
Nanotubes
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