Subwavelength focusing using a hyperbolic medium with a single slit.

Citation data:

Applied optics, ISSN: 1539-4522, Vol: 50, Issue: 31, Page: G27-30

Publication Year:
2011
Usage 5
Abstract Views 5
Captures 21
Readers 21
Citations 15
Citation Indexes 15
Repository URL:
https://repository.hkbu.edu.hk/phys_ja/47
PMID:
22086043
DOI:
10.1364/ao.50.000g27
Author(s):
Li, Guixin; Li, Jensen; Cheah, Kok Wai
Publisher(s):
The Optical Society; Optical Society of America
Tags:
Physics and Astronomy; Physics
article description
A hyperbolic dispersion medium with a planar surface that can be used for subwavelength focusing is proposed. By combining the hyperbolic medium in a single slit with diffraction limit width, a laser beam could be focused to a subwavelength spot in the near field. Compared to a conventional superlens, the subdiffraction focusing in this work has higher optical throughput. Using a planar hyperbolic medium, which is actually alternating silver/dielectric multilayers, we showed that the focusing resolution of the designed device is down to ~λ/5 using green light illumination (at a wavelength of 514.5 nm).