Subwavelength superfocusing with a dipole-wave-reciprocal binary zone plate

Subwavelength superfocusing with a dipole-wave-reciprocal binary zone plate

We propose an idea of using a convergent dipole wave at the aperture, radiated from a dipole at distance of z0, to produce a perfect focusing at z0. We verified this idea through simulation and experimental observation. It is demonstrated that the zone plate designed based on the idea can provide...

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Bibliographic Details
Main Authors: Wang, Jun, Qin, Fei, Zhang, Dao Hua, Li, Dongdong, Wang, Yueke, Shen, Xiaonan, Yu, Ting, Teng, Jing Hua
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
Online Access:https://hdl.handle.net/10356/96433
http://hdl.handle.net/10220/9889
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Institution: Nanyang Technological University
Language: English
Description
Summary:We propose an idea of using a convergent dipole wave at the aperture, radiated from a dipole at distance of z0, to produce a perfect focusing at z0. We verified this idea through simulation and experimental observation. It is demonstrated that the zone plate designed based on the idea can provide a subwavelength superfocusing by effectively bending the surface waves in a Fresnel region of 100 nm to a couple of wavelengths and is suitable for a situation where a superresolution at a micro working distance is essential.

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