Metal-dielectric-metal plasmonic resonators for active beam steering in the infrared
Author
Battal, E.
Okyay, Ali Kemal
Date
2013Source Title
Optics Letters
Print ISSN
0146-9592
Publisher
Optical Society of America
Volume
38
Issue
6
Pages
983 - 985
Language
English
Type
ArticleItem Usage Stats
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Abstract
Active beam-steering devices near the optical frequencies have long been sought after due to their applications in communication, defense, and display technologies; however, the challenge lies in achieving actively tunable structures near these frequencies. An array of metal-dielectric-metal plasmonic resonators is demonstrated as a dynamic beam-steering device to operate at midinfrared wavelengths. We numerically demonstrate continuous-angle beam steering of 8.75° by making use of tunable properties of silicon as the active dielectric. The proposed device achieves a refractive index insensitive divergence angle and it operates in a 650 nm wide spectral window around 10 μm wavelength. The results of this Letter pave the way to exploiting active beam steering in various applications at midinfrared wavelengths.
Keywords
Applications in communicationsBeam-steering devices
Display technologies
Mid-infrared wavelengths
Optical frequency
Plasmonic resonators
Spectral windows
Tunable properties
Display devices
Plasmons
Refractive index
Resonators
Metals