Open Access3D conical helix metamaterial–based isotropic broadband perfect light absorber
Author(s) -
Renilkumar Mudachathi,
Takuo Tanaka
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.026369
Subject(s) - optics , materials science , metamaterial , metamaterial absorber , conical surface , resonator , ray , absorbance , isotropy , optoelectronics , silicon , broadband , polarization (electrochemistry) , physics , chemistry , tunable metamaterials , composite material
We present the design and fabrication of an isotropic broadband perfect light absorber in the near-infrared range using 3D metamaterials with a single resonator in the unit cell. The metamaterial resonator is comprised of a gold conical helix supported on a silicon pillar with back reflector realized on a silicon substrate. Simulations and experiments have demonstrated that the proposed absorber achieves a broad absorption band of more than 3 µm in the 1.5-4.5 µm wavelength range with an average absorbance of more than 90%. The numerical and experimental analyses show that the proposed device can provide both incident angle and polarization independent operations, which further widens the application prospects of our device.