Negative Refraction at Visible Frequencies
Abstract
Nanofabricated photonic materials offer opportunities for crafting the propagation and dispersion of light in matter. We demonstrate an experimental realization of a two-dimensional negative-index material in the blue-green region of the visible spectrum, substantiated by direct geometric visualization of negative refraction. Negative indices were achieved with the use of an ultrathin Au-Si_3N_4-Ag waveguide sustaining a surface plasmon polariton mode with antiparallel group and phase velocities. All-angle negative refraction was observed at the interface between this bimetal waveguide and a conventional Ag-Si_3N_4-Ag slot waveguide. The results may enable the development of practical negative-index optical designs in the visible regime.
Additional Information
© 2007 American Association for the Advancement of Science. Received 26 December 2006; accepted 12 March 2007; Published online 22 March 2007. Supported by a National Defense Science and Engineering Graduate Fellowship administered by the Army Research Office (J.A.D.) and by the Air Force Office of Scientific Research under Plasmon Multidisciplinary University Research Initiative FA9550-04-1-0434. We thank L. Sweatlock, D. Pacifici, R. Walters, B. Kayes, N. Vu, G. Derose, and A. Scherer for engaging discussions and technical assistance.Attached Files
Supplemental Material - Lezec.SOM.revision.1.0427.pdf
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Additional details
- Eprint ID
- 51745
- Resolver ID
- CaltechAUTHORS:20141114-090817526
- National Defense Science and Engineering Graduate (NDSEG) Fellowship
- Army Research Office (ARO)
- FA9550-04-1-0434
- Air Force Office of Scientific Research (AFOSR)
- Created
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2014-11-14Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field