Open AccessMultiple path length dual polarization interferometry
Author(s) -
Paul Coffey,
Marcus J. Swann,
Thomas Andrew Waigh,
F. Schedin,
Jian R. Lu
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.010959
Subject(s) - interferometry , optics , materials science , refractive index , optical path length , path length , polarization (electrochemistry) , dual polarization interferometry , in situ , optical path , physics , chemistry , telecommunications , meteorology , computer science , antenna (radio)
An optical sensor for quantitative analysis of ultrathin films and adsorbed layers is described. Quantification of both layer thickness and refractive index (density) can be made for in situ and ex-situ coated films. With the use of two polarizations, in situ measurements are made via one path length in a young's interferometer arrangement while ex-situ measurements use multiple path lengths. The multiple path length young's interferometer arrangement is embodied in a solid state waveguide configuration called the multiple path length dual polarization interferometer (MPL-DPI). The technique is demonstrated with ultrathin layers of poly(methylmethacrylate) and human serum albumin.