Open AccessObservation of focal point shift in solid immersion mirror
Author(s) -
Chao Peng
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.001498
Subject(s) - optics , immersion (mathematics) , materials science , wavelength , numerical aperture , planar , focal point , focal length , parabolic reflector , physics , cardinal point , lens (geology) , geometry , mathematics , computer graphics (images) , computer science
Focal point shift in a solid immersion mirror of a high numerical-aperture is experimentally demonstrated with a scanning near-field optical microscope. The solid immersion mirror focuses light by a two-dimensional parabolic reflective surface integrated in a planar waveguide. The focal point shifts inward along the optical axis for metallized surface. The amount of shift from its geometrical node depends on the wavelength of the incident light and is determined to be roughly one-fifth of the wavelength.