Broadband perfect absorber based on one ultrathin layer of refractory metal
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Open Access
- 28 May 2015
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 40 (11), 2592-2595
- https://doi.org/10.1364/ol.40.002592
Abstract
Broadband perfect absorber based on one ultrathin layer of the refractory metal chromium without structure patterning is proposed and demonstrated. The ideal permittivity of the metal layer for achieving broadband perfect absorption is derived based on the impedance transformation method. Since the permittivity of the refractory metal chromium matches this ideal permittivity well in the visible and near-infrared range, a silica-chromium-silica three-layer absorber is fabricated to demonstrate the broadband perfect absorption. The experimental results under normal incidence show that the absorption is above 90% over the wavelength range of 0.4–1.4 μm, and the measurements under angled incidence within 400–800 nm prove that the absorber is angle-insensitive and polarization-independent.Keywords
Funding Information
- National Science Foundation (NSF) (CBET-1402743)
- U.S. Department of Energy (DOE) (DE-AC02-06CH11357)
This publication has 20 references indexed in Scilit:
- Plasmonic and metamaterial structures as electromagnetic absorbersLaser & Photonics Reviews, 2014
- Metamaterial thermal emitters based on nanowire cavities for high-efficiency thermophotovoltaicsJournal of Optics, 2014
- High temperature epsilon-near-zero and epsilon-near-pole metamaterial emitters for thermophotovoltaicsOptics Express, 2012
- Metamaterial-based integrated plasmonic absorber/emitter for solar thermo-photovoltaic systemsJournal of Optics, 2012
- Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbersNature Communications, 2011
- Taming the Blackbody with Infrared Metamaterials as Selective Thermal EmittersPhysical Review Letters, 2011
- Omnidirectional, polarization-insensitive and broadband thin absorber in the terahertz regimeJournal of the Optical Society of America B, 2010
- Design, theory, and measurement of a polarization-insensitive absorber for terahertz imagingPhysical Review B, 2009
- Omnidirectional absorption in nanostructured metal surfacesNature Photonics, 2008
- Design and fabrication of planar multilayer structures with coherent thermal emission characteristicsJournal of Applied Physics, 2006