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Title: A Comparison of Kretschmann-Raether Angular Regimes for Measuring Changes in Bulk Refractive Index

Abstract

We compare 2 angular regimes for the measurement of changes in the real refractive index of bulk fluid analytes. The measurements are based on the use of the Kretschmann-Raether configuration to sense a change in reflectivity with index. Specifically, we numerically simulate the relative sensitivities of the total internal reflection (TIR) and surface-plasmon resonance (SPR) regimes. For a fixed-angle apparatus, the method which gives the greatest change in reflectivity varies with metal film thickness. For films thicker than the skin depth, the SPR regime is the most sensitive to index changes. For thinner films, however, the TIR angle is then dominant, with increases in sensitivity on the order of 75% for 10 nm gold or silver media.

Authors:
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
12677
Report Number(s):
SAND99-2410J
TRN: AH200120%%383
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Applied Optics
Additional Journal Information:
Other Information: Submitted to Applied Optics; PBD: 16 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GOLD; REFLECTIVITY; REFRACTIVE INDEX; SENSITIVITY; SILVER; MEASURING METHODS

Citation Formats

KASUNIC, K.J. A Comparison of Kretschmann-Raether Angular Regimes for Measuring Changes in Bulk Refractive Index. United States: N. p., 1999. Web.
KASUNIC, K.J. A Comparison of Kretschmann-Raether Angular Regimes for Measuring Changes in Bulk Refractive Index. United States.
KASUNIC, K.J. Thu . "A Comparison of Kretschmann-Raether Angular Regimes for Measuring Changes in Bulk Refractive Index". United States. https://www.osti.gov/servlets/purl/12677.
@article{osti_12677,
title = {A Comparison of Kretschmann-Raether Angular Regimes for Measuring Changes in Bulk Refractive Index},
author = {KASUNIC, K.J.},
abstractNote = {We compare 2 angular regimes for the measurement of changes in the real refractive index of bulk fluid analytes. The measurements are based on the use of the Kretschmann-Raether configuration to sense a change in reflectivity with index. Specifically, we numerically simulate the relative sensitivities of the total internal reflection (TIR) and surface-plasmon resonance (SPR) regimes. For a fixed-angle apparatus, the method which gives the greatest change in reflectivity varies with metal film thickness. For films thicker than the skin depth, the SPR regime is the most sensitive to index changes. For thinner films, however, the TIR angle is then dominant, with increases in sensitivity on the order of 75% for 10 nm gold or silver media.},
doi = {},
journal = {Applied Optics},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}