Optical properties of coupled nano gold particles

Kai-Hung Su; Qi-Huo Wei; Xiang Zhang; Jack J. Mock; David R. Smith; Sheldon Schultz

doi:10.1117/12.506371

28 October 2003 Optical properties of coupled nano gold particles

Kai-Hung Su, Qi-Huo Wei, Xiang Zhang, Jack J. Mock, David R. Smith, Sheldon Schultz

Proceedings Volume 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties; (2003) https://doi.org/10.1117/12.506371
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Nano gold particles interact strongly with visible light to excite the collaborative oscillation of conductive electrons within nano particles resulting in a surface plasmon resonance which makes them useful for various applications including bio-labeling. In this paper, we study the effect of particle sizes with particle plasmon resonant wavelength and the coupling between pair of elliptical metallic disks and ellipsoid particles by simulations and experiments. The red-shift resonant peak wavelength of coupled particles to that of single particle is due to particle plasmons near-field coupling. The shift decays is approximately exponentially with increasing particle spacing, and reaches zero when the gap between the two particles exceeds about 2.5 times the particle short axis length. It is also found that the exponential decay of peak shift with particle gap is size independent but shape dependent.

Citation Download Citation

Kai-Hung Su, Qi-Huo Wei, Xiang Zhang, Jack J. Mock, David R. Smith, and Sheldon Schultz "Optical properties of coupled nano gold particles", Proc. SPIE 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties, (28 October 2003); https://doi.org/10.1117/12.506371

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