Processes in resonant domains of metal nanoparticle aggregates and optical nonlinearity of aggregates in pulsed laser fields


Тип публикации: статья из журнала

Год издания: 2009

Идентификатор DOI: 10.1007/s00340-009-3592-y

Ключевые слова: Metal nanoparticles, Nanosecond pulsed laser, Nonlinear refractive index, Optical nonlinearity, Physical effects, Pulsed-laser field, Resonant domain, Silver nanoparticles, Simple Physical Models, Aggregates, Laser excitation, Nanoparticles, Nonlinear optics, Organic polymers, Pulsed laser applications, Refractive index, Silver

Аннотация: Optical nonlinearities in aggregates of nanoparticles formed in silver hydrosols (SHs) are studied under pico- and nanosecond pulsed laser excitation. The dependence of the nonlinear refractive index n (2) on the degree of hydrosol aggregation is studied experimentally at the wavelength lambda=1.064 mu m. It is found that n (2) chaПоказать полностьюnges sign when the degree of hydrosol aggregation is increased. Various physical effects occurring in resonant domains of the aggregates are analyzed using a simple physical model of two bound silver nanoparticles. The theory takes into account thermal, elastic, electrostatic, and light-induced effects. Experimental results are discussed in the context of this theory.

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Выпуск журнала: Vol. 97, Is. 1

Номера страниц: 163-173

ISSN журнала: 09462171

Место издания: NEW YORK

Издатель: SPRINGER


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