Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 4, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4862794
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Funding
- NSF [ECCS-0747623]
- Economic Development Corporation of State of Michigan [N016508]
- Directorate For Engineering [0747623] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [0747623] Funding Source: National Science Foundation
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Near-field plates consist of non-periodically patterned surfaces that can overcome the diffraction limit and confine electromagnetic fields to subwavelength dimensions. Previous near-field plates experimentally demonstrated extreme field tailoring capabilities. However, their performance suffered from radiation/reflection in undesired directions, those other than the subwavelength focus. This issue can limit the practical use of near-field plates. In this paper, we address this issue by designing a unidirectional near-field plate that can form a subwavelength focal pattern, while suppressing the field radiated/reflected in other directions. The design and operation of the proposed unidirectional near-field plate are verified through full-wave simulation. The unidirectional near-field plate may find application in high resolution imaging and probing, high density data storage, and wireless power transfer systems. As an example, its utility as a high resolution probe is demonstrated through full-wave electromagnetic simulation. (C) 2014 AIP Publishing LLC.
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