Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Sensitivity of optical sensors based on laser-excited surface-plasmon waves

Not Accessible

Your library or personal account may give you access

Abstract

We investigate the effect of the divergence of a Gaussian laser beam on the resonance curve and the sensitivity of optical sensors based on surface-plasmon resonance (SPR). For He–Ne laser beams it is found that, for beams with a waist radius of less than 300 µm, the SPR-curve characteristics differ appreciably from the case in which a plane wave is considered. Simple expressions for the sensitivity of (bio)chemical sensors are given. A simple Lorentzian model is used to estimate the maximum possible sensitivity when a multilayer system is used to enhance the resonance peak. It was found that the sensitivity can reach its highest value when the width of the SPR curve is equal to the laser-beam divergence. The results could be particularly important when a SPR curve is used to measure the absolute value of the refractive index of a sample or the dielectric constant and the thickness of a metal layer.

© 1999 Optical Society of America

Full Article  |  PDF Article
More Like This
Nanorod-mediated surface plasmon resonance sensor based on effective medium theory

Junxue Fu, Bosoon Park, and Yiping Zhao
Appl. Opt. 48(23) 4637-4649 (2009)

Bandgap-assisted surface-plasmon sensing

Arnaud J. Benahmed and Chih-Ming Ho
Appl. Opt. 46(16) 3369-3375 (2007)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (16)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved