PARTICLE ON A SURFACE: ABOUT POSSIBLE ACOUSTIC AND PLASMONICS EFFECTS IN DRY LASER CLEANING

Авторы: LUK'YANCHUK B.S., WANG Z.B., ZHOU Y., HONG M.H., SONG W.D., CHONG T.C.
Сборник: Laser Cleaning II
Год издания: 2007
Место издания: WORLD SCIENTIFIC
Первая страница: 79
Последняя страница: 111
DOI: 10.1142/9789812706843_0003
Аннотация: A laser irradiated particle on a surface produces a complicated intensity distribution on the substrate. In the case of a transparent particle, and normal incidence of radiation, the intensity has near-field focusing near the center and additional ring(s) around the basic maximum. This ring of intensity produces a cylindrical convergent surface acoustic wave, which can enhance the particle removal. Another effect is discussed for metallic particles. The intensity on the surface under a metallic particle is typically diminished due to the screening effect, in contrast to transparent particles, which act as a near-field lens. Nevertheless, if one uses radiation frequencies near the surface plasmon resonance, the conditions for efficient coupling of radiation with a metallic surface can be provided. This plasmonic effect can permit laser cleaning of metallic nanoparticles from a silicon surface.
Добавил в систему: Лукьянчук Борис Семенович

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