Surface plasmon resonance (SPR)-based sensors have seen
tremendous developments during the past decade, and some of
these sensors are becoming a mature technology now, although
improvements in their sensitivity and detection limit are
ongoing. Together with the recent investigations in localized SPR
(LSPR) phenomena, extraordinary optical transmission through
nanoapertures in metals, and surface-enhanced spectroscopies,
        
optical sensing. Sensitivity enhancement techniques based on SPR
phenomena are reviewed, focusing both on physical transduction
mechanisms and system performance. It is shown that in the
majority of cases, sensitivity enhancement is associated with the
       
describing the EM interaction energy within the analyte.
Chapter 7
Enhanced Spectroscopies and Surface
Plasmon Thin-Film Sensors
Nanoantenna: Plasmon-Enhanced Spectroscopies for Biotechnological Applications
Edited by Marc Lamy de la Chapelle and Annemarie Pucci
Copyright © 2013 Pan Stanford Publishing Pte. Ltd.
ISBN 978-981-4303-61-3 (Hardcover), 978-981-4303-62-0 (eBook)
www.panstanford.com
Ibrahim Abdulhalim
Department of Electro Optic Engineering and the Ilse Katz Institute for Nanoscale
Science and Technology, Ben Gurion University of the Negev,
Beer Sheva 84105, Israel
abdulhlm@bgu.ac.il
196
Enhanced Spectroscopies and Surface Plasmon Thin-Film Sensors
Examples are given starting from the well-known Kretschmann
  
metals, the addition of gratings, the use of nanosculptured thin

         
shaped, parallel, and tilted nanorods, prepared using many variants
of the basic oblique angle deposition (OAD) technique. Because of



infrared (Vis-NIR) range, gave these structures the property of
        
          
many interesting optical phenomena such as surface-enhanced
     
and surface-enhanced infrared absorption (SEIRA). A comparison is

and silicon, and between various shapes, such as columns, screws,
     

7.1 Introduction

        
sensing a variety of target samples, including pesticides, pollutants,
biological pathogens, toxins, and diseased tissue. The past decade
has seen tremendous advancements in the optics of nanostructured
metals, and a new research area called nanoplasmonics has thereby
emerged. The sensitivity and detection limit of SPR-based sensors
continues to improve so that samples of ever smaller volumes can
 
       
  
with the interaction of EM waves with metallic or, more generally,
         
    plasmonics,

which deals with
SPR-related science and technology.
4
         
density oscillations on the interface between a conductor and a

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