Optical properties of gold particles with near micron size: localized and propagating surface plasmons

Ludovic S. Live; Jean-Francois Masson

doi:10.1117/12.839625

4 August 2009 Optical properties of gold particles with near micron size: localized and propagating surface plasmons

Ludovic S. Live, Jean-Francois Masson

Proceedings Volume 7386, Photonics North 2009; 73861M (2009) https://doi.org/10.1117/12.839625
Event: Photonics North 2009, 2009, Quebec, Canada

Abstract

This proceeding summarizes the optical properties of plasmonic structures from nanoscale to macroscale. Of particular interest, Au triangles and hole arrays of near micron size exhibit concomitantly surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) optical properties in the Vis-NIR region, resulting in excellent optical properties for biosensing. In transmission spectroscopy, 15 nm nanoparticles absorbs at λ = 525 nm, nanotriangles of > 200 nm edge length absorbs at λ > 600 nm while nanohole arrays exhibit a more complex spectrum including absorption and enhanced optical transmission (EOT) features. Nanohole arrays are also sensitive to refractive index (RI) change and it can be optimized by tailoring the hole diameter and the periodicity. Au triangles ranging from nano (200 nm) to micron size (1.5 μm) are active in LSPR with an absorption peak that redshifts with the increasing aspect ratio of the structure. In total internal reflection (TIR) experiment, Au triangles with an edge length of 500 nm or greater present an absorption peak at λ = 800 nm. Also, triangles of 700, 950 and 1800 nm have a maximum transmission around λ= 650 nm that is highly sensitive to refraction index (RI) variations. This absorption peak is attributed to propagating SPR, similarly to the optical phenomenon occurring on a smooth Au film as used in the Kretschmann configuration of SPR. Lastly, nanohole and microhole arrays spectra, measured in TIR, are a composite of both triangles (LSPR) and thin film spectra (SPR).

Citation Download Citation

Ludovic S. Live and Jean-Francois Masson "Optical properties of gold particles with near micron size: localized and propagating surface plasmons", Proc. SPIE 7386, Photonics North 2009, 73861M (4 August 2009); https://doi.org/10.1117/12.839625

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Gold

Absorption

Optical properties

Thin films

Nanoparticles

Surface plasmons

Plasmonics

Show All Keywords

Keywords/Phrases

Search In:

Publication Years