Journal
OPTICS LETTERS
Volume 37, Issue 11, Pages 2133-2135Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.37.002133
Keywords
-
Categories
Funding
- 973 Program of China [2011CB301800]
- National Natural Science Foundation of China [60825405, 61138002, 61177013]
Ask authors/readers for more resources
We propose a broadband infrared absorber by engineering the frequency dispersion of metamaterial surface (metasurface) to mimic an ideal absorbing sheet. With a thin layer of structured nichrome, a polarization-independent absorber with absorption larger than 97% is numerically demonstrated over a larger than one octave bandwidth. It is shown that the bandwidth enhancement is related with the transformation of the Drude model of free electron gas in metal film to the Lorentz oscillator model of a bound electron in the structured metallic surface. We believe that the concept of dispersion engineering may provide helpful guidance for the design of a broadband absorber. (c) 2012 Optical Society of America
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