Near-field optical microscopy simulations using graphics processing units

Varování

Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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KLAPETEK Petr VALTR Miroslav

Rok publikování 2010
Druh Článek v odborném periodiku
Časopis / Zdroj Surface and Interface Analysis
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Optika, masery a lasery
Klíčová slova scanning near-field optical microscopy; finite difference in time domain; graphics processing unit
Popis Scanning near-field optical microscopy(NSOM)is a perspective method for local analysis of optical parameters of nanostructures used in electro-optics, photonics and many other field of research. One of the approaches to determine the effects of topography on optical data is to simulate NSOM images using an electromagnetic field modeling method, e.g. finite difference in time domain method. However, this approach is extremely slow, as full electromagnetic field propagation calculation must be run for each pixel of the resulting simulated image. In this paper, we present a fast method for computing simulated NSOM images based on the use of a graphics processing unit (GPU or computer graphics card) in order to speed up the computations. We will show that the large speedup using this approach (more than 40 times) allows us to simulate images in a time comparable to their real measurement, which increases the possibilities of quantitative analysis using NSOM. Data simulated by a GPU will be compared with those of real measurements as well.
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