Share Email Print
cover

Proceedings Paper

Negative group velocity of surface plasmons on thin metallic films
Author(s): Yongmin Liu; David F. P. Pile; Zhaowei Liu; Dongmin Wu; Cheng Sun; Xiang Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

By tailoring the dispersion curve of surface plasmons (SPs) of a thin metallic film surrounded by dielectric half-spaces, it is shown that the group velocity of the symmetric mode is always positive, while the group velocity of the anti-symmetric mode can be negative. Consequently, the forward and backward propagation of SPs, in which the energy flow is respectively parallel or antiparallel to the wave vector, can be realized. The physical origin of the intriguing backward SPs is given. Furthermore, schemes for the negative refraction and imaging of SPs are proposed by incorporating two plasmon modes with group velocities of opposite signs.

Paper Details

Date Published: 30 August 2006
PDF: 9 pages
Proc. SPIE 6323, Plasmonics: Metallic Nanostructures and their Optical Properties IV, 63231M (30 August 2006); doi: 10.1117/12.681492
Show Author Affiliations
Yongmin Liu, Univ. of California, Berkeley (United States)
David F. P. Pile, Univ. of California, Berkeley (United States)
Zhaowei Liu, Univ. of California, Berkeley (United States)
Dongmin Wu, Univ. of California, Berkeley (United States)
Cheng Sun, Univ. of California, Berkeley (United States)
Xiang Zhang, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 6323:
Plasmonics: Metallic Nanostructures and their Optical Properties IV
Mark I. Stockman, Editor(s)

© SPIE. Terms of Use
Back to Top