Near-field measurement of short-range correlation in optical waves transmitted through random media

Autor:	Ad Lagendijk, Valentina Emiliani, Marcello Colocci, Francesca Intonti, Diederik S. Wiersma, Fouad Aliev, Maximilien Cazayous
Rok vydání:	2003
Předmět:	Histology business.industry Physics::Optics Near and far field Pathology and Forensic Medicine Speckle pattern Correlation function (statistical mechanics) Optics Microscopy Spatial dependence business Refractometry Image resolution Photon diffusion
Zdroj:	Journal of Microscopy. 209:173-176
ISSN:	0022-2720
Popis:	Two-dimensional near-field images of speckle patterns formed by optical waves transmitted through a disordered porous silica glass sample are measured. The corresponding 2D intensity correlation function, C, is extracted. The subwavelength spatial resolution of near-field microscopy allows us to resolve in the spatial distribution of C the expected subwavelength oscillations and to follow their dependence on the excitation wavelength. Finally, we deduce the effective refractive index of the material by fitting the theoretical spatial dependence of C to our experimental results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1208b50e5d178b9eb23a30d9f0dd1a5d https://doi.org/10.1046/j.1365-2818.2003.01092.x Zobrazit plný text záznamu Plný text ve formátu PDF