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 Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- 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. 1999.
"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 = {},
url = {https://www.osti.gov/biblio/12677},
journal = {Applied Optics},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 16 00:00:00 EDT 1999},
month = {Thu Sep 16 00:00:00 EDT 1999}
}