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http://dx.doi.org/10.3807/KJOP.2014.25.2.095

Study of the Dependence of the Electric Potential on Surface Plasmon Resonance Characteristics  

Jeong, Intae (Department of Transdisciplinary, Graduate School of Convergence Science and Technology, Seoul National University)
Kwon, Jooseong (Department of Electrical and Computer Engineering, School of Engineering, Seoul National University)
Park, Young June (Department of Transdisciplinary, Graduate School of Convergence Science and Technology, Seoul National University)
Publication Information
Korean Journal of Optics and Photonics / v.25, no.2, 2014 , pp. 95-101 More about this Journal
Abstract
When voltage is applied on the metal layer of a surface plasmon resonance (SPR) sensor, electric field excitation causes charge accumulation on the metal surface. This alters not only the optical properties of the metal but also the SPR angle. In this study we investigate this effectby performing experiments using solutions of various pH values, and we obtain the relation between total surface charge and SPR angle. The curves for the various pH conditions become coincident. We compare our results to those from an earlier space charge layer (SCL) model, and suggest a modified SCL model which explains our result well. This result will be useful in applications of SPR sensors, and in studying the optical properties of thin metal layers.
Keywords
Surface plasmon resonance sensor; Optical property of metal;
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Times Cited By KSCI : 1  (Citation Analysis)
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