Open AccessCalculation of the vectorial field distribution in a stratified focal region of a high numerical aperture imaging system
Author(s) -
A.S. van de Nes,
L. Billy,
Silvania F. Pereira,
Joseph J. M. Braat
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.001281
Subject(s) - optics , numerical aperture , electric field , aperture (computer memory) , lens (geology) , physics , cardinal point , depth of field , focal length , materials science , acoustics , wavelength , quantum mechanics
We present an algorithm for calculating the field distribution in the focal region of stratified media which is fast and easy to implement. Using this algorithm we study the effect on the electric field distribution of an air gap separating a solid immersion lens and a sample, where we analyse the maximum distance for out-of-contact operation. Also, we study how the presence of a metallic substrate affects the field distribution in the focal region; the interference effects of the reflected field could be used as an alternative for 4Pi-microscopy.