Journal
NANO LETTERS
Volume 13, Issue 1, Pages 159-163Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl303841n
Keywords
Planar lens; diffraction lens; plasmonic lens; phase control
Categories
Funding
- AFRL Materials and Manufacturing Directorate Applied Metamaterials Program
- Japan Society for the Promotion of Science (JSPS)
- ONR MURI [N00014-010942]
- NSF DMR [1120923]
Ask authors/readers for more resources
We study a planar, holey-metal lens made as a set of concentric circular arrays (rings) of nanoscale holes milled in a subwavelength-thick metal film. Each nanohole-a finite-length, circular, single-mode waveguide with a radius-dependent mode index-is used as a phase-shifting element. Our experimental results confirm that the focusing properties of our polarization-independent, holey-metal lens milled in a 380-nm-thick gold film and illuminated with 531 nm light fits the analytical model well. The proposed concept could offer an alternative to conventional refraction microlenses and open up a vital path toward on-chip or fiber-end planar photonic devices for biosensing and imaging.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available