Light focusing with tip formed array of plasmon-polariton waveguides

W. M. Saj

doi:10.1117/12.734281

22 September 2007 Light focusing with tip formed array of plasmon-polariton waveguides

W. M. Saj

Proceedings Volume 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V; 664120 (2007) https://doi.org/10.1117/12.734281
Event: NanoScience + Engineering, 2007, San Diego, California, United States

Abstract

We present FDTD simulations of light interaction with two dimensional silver structure made of the tip forming array of channel plasmon-polariton waveguides, that confines light to a small width beam or focus. The flat end of triangle formed plasmon-polariton waveguides array is illuminated with the optical range H-polarized Gaussian beam or plane wave. Light is transported through the structure with plasmon-polariton waves on surface of metal. At sloped planes energy from plasmon-polariton modes is refracted at an angle defined by propagation constants of modes. Propagation constants of excited plasmon-polaritons modes in waveguides array are predicted by semi-analytical calculations. Choosing canal widths, their separation and slop angle, we can couple energy from waveguides array to both free space propagation beams and to surface waves of the whole tip structure, which have propagation constants greater than free space waves. Combined effects of refraction, diffraction on the narrow end of the structure and the plasmon-polaritons like properties of surface waves on the whole structure lead to significant local enhancement of the field, high directivity of the output energy and focusing with resolution below diffraction limit for free space.

Citation Download Citation

W. M. Saj "Light focusing with tip formed array of plasmon-polariton waveguides", Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 664120 (22 September 2007); https://doi.org/10.1117/12.734281

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