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97 Percent Light Absorption In An Ultrabroadband Frequency Range Utilizing An Ultrathin Metal Layer: Randomly Oriented, Densely Packed Dielectric Nanowires As An Excellent Light Trapping Scaffold
- Source :
- Nanoscale
- Publication Year :
- 2017
- Publisher :
- Aperta, 2017.
-
Abstract
- In this paper, we propose a facile and large scale compatible design to obtain perfect ultrabroadband light absorption using metal-dielectric core-shell nanowires. The design consists of atomic layer deposited (ALD) Pt metal uniformly wrapped around hydrothermally grown titanium dioxide (TiO2) nanowires. It is found that the randomly oriented dense TiO2 nanowires can impose excellent light trapping properties where the existence of an ultrathin Pt layer (with a thickness of 10 nm) can absorb the light in an ultrabroadband frequency range with an amount near unity. Throughout this study, we first investigate the formation of resonant modes in the metallic nanowires. Our findings prove that a nanowire structure can support multiple longitudinal localized surface plasmons (LSPs) along its axis together with transverse resonance modes. Our investigations showed that the spectral position of these resonance peaks can be tuned with the length, radius, and orientation of the nanowire. Therefore, TiO2 random nanowires can contain all of these features simultaneously in which the superposition of responses for these different geometries leads to a flat perfect light absorption. The obtained results demonstrate that taking unique advantages of the ALD method, together with excellent light trapping of chemically synthesized nanowires, a perfect, bifacial, wide angle, and large scale compatible absorber can be made where an excellent performance is achieved while using less materials.
- Subjects :
- Materials science
Ultrathin metal layers
Nanowire
Transverse resonance mode
Localized surface plasmon
02 engineering and technology
Dielectric
Trapping
01 natural sciences
7. Clean energy
Nanowire structures
Dielectric materials
010309 optics
Atomic layer deposited
Atomic layer deposition
Optics
0103 physical sciences
General Materials Science
Electromagnetic wave absorption
Light absorption
Platinum
High-κ dielectric
Scaffolds
Different geometry
Nanowires
business.industry
Titanium dioxides (TiO2)
Resonance
021001 nanoscience & nanotechnology
Metals
Titanium dioxide
Dielectric nanowires
Optoelectronics
Titanium compounds
0210 nano-technology
business
Layer (electronics)
High-k dielectric
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Nanoscale
- Accession number :
- edsair.doi.dedup.....d69d29e18f84693bc6aa006d7741901c