Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates
URI (for links/citations):
https://iopscience.iop.org/article/10.1088/1674-1056/ab6551https://elib.sfu-kras.ru/handle/2311/143017
Author:
Ершов, Александр Евгеньевич
Герасимов, Валерий Сергеевич
Исаев, Иван Леонидович
Гаврилюк, Анатолий Петрович
Карпов, Сергей Васильевич
Corporate Contributor:
Научно-исследовательский институт нанотехнологий, спектроскопии и квантовой химии
Без кафедры
Date:
2020Journal Name:
Chinese Physics BJournal Quartile in Scopus:
Q3Journal Quartile in Web of Science:
Q3Bibliographic Citation:
Ершов, Александр Евгеньевич. Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates [Текст] / Александр Евгеньевич Ершов, Валерий Сергеевич Герасимов, Иван Леонидович Исаев, Анатолий Петрович Гаврилюк, Сергей Васильевич Карпов // Chinese Physics B. — 2020. — Т. 29 (№ 3). — С. 037802Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Abstract:
We have studied the dynamic and static processes occurring in disordered multiparticle colloidal Ag aggregates with natural structure and affecting their plasmonic absorption spectra under pico- and nanosecond pulsed laser radiations, as well as the physical origin responsible for these processes. We have shown that depending on the duration of the laser pulse, the mechanisms of laser modification of such aggregates can be associated both with changes in the resonant properties of the particles due to their heating and melting (picosecond irradiation mode) and with the particle shifts in the resonant domains of the aggregates (nanosecond pulses) which depend on the wavelength, intensity, and polarization of the radiation. These mechanisms result in formation of a narrow dip in the plasmonic absorption spectrum of the aggregates near the laser radiation wavelength and affect the shape and position of the dip. The effect of polydispersity of nanoparticle aggregates on laser photochromic reaction has been studied.