The influence of the reduced dimension on the dephasing time of surface plasmon excitation in gold nanoparticles

Frank Hubenthal; Torsten Ziegler; Christian Hendrich; Tigran A. Vartanyan; Frank Traeger

doi:10.1117/12.503662

28 October 2003 The influence of the reduced dimension on the dephasing time of surface plasmon excitation in gold nanoparticles

Frank Hubenthal, Torsten Ziegler, Christian Hendrich, Tigran A. Vartanyan, Frank Traeger

Author Affiliations +

Proceedings Volume 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties; (2003) https://doi.org/10.1117/12.503662
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

In this contribution, we present measurements of the ultrafast dephasing time T₂ of surface plasmon polariton excitation in gold nanoparticles by means of persistent spectral hole burning. T₂ is an essential parameter that does not only reflect the role of different dephasing and deexcitation mechanisms but also allows one to determine the field enhancement factor that is of great importance for many applications of nanoparticles. In our experiments gold nanoparticles were first fabricated in ultrahigh vacuum on sapphire substrates by deposition of atoms, followed by diffusion and nucleation, i.e. Volmer-Weber growth. Subsequently, systematic measurements of T₂ in the size range between r = 7 nm and 14 nm were carried out. The most essential among the numerous results is the observation of the influence of the reduced dimension on the dephasing time. While T₂ = 14 fs has been measured for r = 12 nm which is, within the error bars, consistent with the damping contained in the bulk dielectric function, the value of T₂ shrinks to, for example, T₂ = 11 fs for r = 7 nm. This reduction of T₂ can be attributed to surface scattering of the electrons. Further experiments are in progress to confirm the predicted 1/r law for the variation of T₂.

Citation Download Citation

Frank Hubenthal, Torsten Ziegler, Christian Hendrich, Tigran A. Vartanyan, and Frank Traeger "The influence of the reduced dimension on the dephasing time of surface plasmon excitation in gold nanoparticles", Proc. SPIE 5221, Plasmonics: Metallic Nanostructures and Their Optical Properties, (28 October 2003); https://doi.org/10.1117/12.503662

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