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:
Usage 5
Abstract Views 5
Captures 22
Readers 22
Citations 15
Citation Indexes 15
Repository URL:
Li, Guixin; Li, Jensen; Cheah, Kok Wai
The Optical Society; Optical Society of America
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).