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Proceedings Paper

Properties of nanostructured metamaterials at optical frequencies
Author(s): A. M. Bratkovsky; E. Ponozovkaya; E. Kim; W. Wu; Y. R. Shen; S.-Y. Wang; L. Thylen
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Paper Abstract

A variety of metamaterials has been demonstrated recently that support backward waves and negative refraction (Negative Index Materials, NIM.) In particular, these materials enable sub-wavelength resolution that makes them even more interesting, especially in optical domain rather than at microwave frequencies where their unusual properties were known for decades. We describe below theoretical and experimental studies of the so-called 'fishnet' metal-spacer holearray metamaterials, which exhibit NIM behavior at optical frequencies, having unit cell size of a few 100s nm. We demonstrate experimentally that their refractive index can be modulated very fast and very strongly (from -2.4 to -1.5) around the communication wavelength of λ1.55 um, in good agreement with the FDTD results. We also discuss a problem of loss compensation in those materials with hefty Ohmic losses by using gain media and local field enhancement in metallic nanoparticles ensembles that enable SERS.

Paper Details

Date Published: 18 November 2008
PDF: 5 pages
Proc. SPIE 7135, Optoelectronic Materials and Devices III, 71352K (18 November 2008); doi: 10.1117/12.807181
Show Author Affiliations
A. M. Bratkovsky, Hewlett-Packard Labs. (United States)
E. Ponozovkaya, Hewlett-Packard Labs. (United States)
E. Kim, Univ. of California, Berkeley (United States)
W. Wu, Hewlett-Packard Labs. (United States)
Y. R. Shen, Univ. of California, Berkeley (United States)
S.-Y. Wang, Hewlett-Packard Labs. (United States)
L. Thylen, Royal Inst of Technology (Sweden)
Hewlett-Packard Labs. (United States)

Published in SPIE Proceedings Vol. 7135:
Optoelectronic Materials and Devices III
Yi Luo; Jens Buus; Fumio Koyama; Yu-Hwa Lo, Editor(s)

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