Nanoantenna

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

[e-mail]

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