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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/17718

Title: Subwavelength Focusing via Holographic Metallic Screens
Authors: Wong, Alex Man Hon
Advisor: Eleftheriades, George V.
Department: Electrical and Computer Engineering
Keywords: Electromagnetics
Antenna
Focusing
Holography
Issue Date: 22-Sep-2009
Abstract: In this work we investigated a new class of subwavelength focusing device, termed the holographic metallic screen. We first proposed a generalized procedure which takes a holographic record of a subwavelength electromagnetic field distribution. Subsequently we synthesized this record using two types of holographic metallic screen – the slot antenna hologram (SAH) and the resonant slot antenna hologram (RSAH). We designed both holograms and evaluated their performances through full-wave simulations, and experimentally demonstrated subwavelength focusing for the RSAH. Simulations and experiments illustrated various attractive properties of the subwavelength focusing RSAH, which included (a) a tighter focal width than a single subwavelength aperture; (b) a focal field amplitude surpassing the incident field amplitude; and (c) a simple design scalable to a wide range of frequencies from microwave to optical. These properties should serve to motivate further development on the holographic metallic screen towards potential applications such as sensing, imaging and lithography.
URI: http://hdl.handle.net/1807/17718
Appears in Collections:Master
The Edward S. Rogers Sr. Department of Electrical & Computer Engineering - Master theses

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