Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
High-efficiency generation of harmonics in polythiophene. / Vasenin, N. T.; Ivanenko, A. V.; Klement'ev, V. M. и др.
в: Quantum Electronics, Том 51, № 5, 05.2021, стр. 437-445.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - High-efficiency generation of harmonics in polythiophene
AU - Vasenin, N. T.
AU - Ivanenko, A. V.
AU - Klement'ev, V. M.
AU - Kulik, L. V.
AU - Nevostruev, D. A.
AU - Nyushkov, B. N.
AU - Trashkeev, S. I.
AU - Khomyakov, M. N.
N1 - The laser system was developed by A.V. Ivanenko and B.N. Nyushkov, with support of the Ministry of Higher Education and Science of the Russian Federation (Grant FSUS-2020-0036). The work was performed within the framework of the State Task for Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences (No. AAAA-A21-121011390038-1). Publisher Copyright: © 2021 Kvantovaya Elektronika and IOP Publishing Limited. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - High-efficiency harmonic generation is observed in a semiconducting polymer RR-P3HT [regioregular poly(3-hexylthiophene)], which exhibits a high nonlinear susceptibility [χ (2) > 10-6 m V-1] under pumping by a pulsed fibre laser. The harmonic generation efficiency in RR-P3HT is comparable or higher than that observed for liquid crystals, which are used in reference experiments to estimate the susceptibility [the quadratic susceptibility of a nematic liquid crystal NLC 1289 is χ (2) ≈ 2 × 10-6 m V-1]. No generation is observed in polythiophene with a random structure, RRa-P3HT [regiorandom poly(3-hexylthiophene)], at the same pump power. It is experimentally demonstrated that a necessary condition for generating the second and third harmonics in a polymer, along with a high pump power density, is the presence of a large power density gradient (exceeding 1013 W m-3). Based on a preliminary theoretical analysis, we can suggest that the quadrupole mechanism, which is a consequence of the regularity of RR-P3HT structure in the thin near-wall layer, may contribute significantly to the nonlinear radiation conversion in semiconducting polymers.
AB - High-efficiency harmonic generation is observed in a semiconducting polymer RR-P3HT [regioregular poly(3-hexylthiophene)], which exhibits a high nonlinear susceptibility [χ (2) > 10-6 m V-1] under pumping by a pulsed fibre laser. The harmonic generation efficiency in RR-P3HT is comparable or higher than that observed for liquid crystals, which are used in reference experiments to estimate the susceptibility [the quadratic susceptibility of a nematic liquid crystal NLC 1289 is χ (2) ≈ 2 × 10-6 m V-1]. No generation is observed in polythiophene with a random structure, RRa-P3HT [regiorandom poly(3-hexylthiophene)], at the same pump power. It is experimentally demonstrated that a necessary condition for generating the second and third harmonics in a polymer, along with a high pump power density, is the presence of a large power density gradient (exceeding 1013 W m-3). Based on a preliminary theoretical analysis, we can suggest that the quadrupole mechanism, which is a consequence of the regularity of RR-P3HT structure in the thin near-wall layer, may contribute significantly to the nonlinear radiation conversion in semiconducting polymers.
UR - http://www.scopus.com/inward/record.url?scp=85106314448&partnerID=8YFLogxK
U2 - 10.1070/QEL17509
DO - 10.1070/QEL17509
M3 - Article
AN - SCOPUS:85106314448
VL - 51
SP - 437
EP - 445
JO - Quantum Electronics
JF - Quantum Electronics
SN - 1063-7818
IS - 5
ER -
ID: 28869209