Large-area, Lithography-free super absorbers and color filters at visible frequencies using ultrathin metallic films

By Zhongyang Li, S. Butun, Koray Aydin. 2014

477 citations recorded by the source corpus.

Nanostructured photonic materials enable control and manipulation of light at subwavelength scales and exhibit unique optical functionalities. In particular, plasmonic materials and metamaterials have been widely utilized to achieve spectral transmission, reflection, and absorption filters based on localized or delocalized resonances arising from the interaction of photons with nanostructured materials. Realization of visible-frequency, high-performance, large-area, optical filters based on nanoplasmonic materials is rather challenging due to nanofabrication related problems (cost, fabrication imperfection, surface roughness) and optical losses of metals. Here, we propose and demonstrate large-area perfect absorbers and transmission filters that overcome difficulties associated with the nanofabrication using a lithography-free approach. We also utilize and benefit from the optical losses in metals in our optical filter designs. Our resonant optical filter design is based on a modified, asymmetric metal–in...

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/8bd81f7e67858eb15a237108a6b0245833581d5d

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Citations in the corpus

Optical absorbers based on strong interference in ultra‐thin films (2016, background): “e [48] [55]. By replacing the lossy semiconductor with a lossless dielectric like silica, and using the metal as the sole absorbing medium, the bandwidth of the absorber can be decreased even further [62]. Conversely, to increase the bandwidth of the absorber, multiple ultra-thin metal/semiconductor”
Review of Metasurface Plasmonic Structural Color (2017, background): “(iii)Measured (dots) and simulated (solid lines) transmittance spectra for MIM cavities with different dielectric thickness d = 100, 125, 150, 175, and 200 nm (Adopted by permission from ACS, Copyright 2015) [116].”