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Title: Broadband optical absorption by tunable Mie resonances in silicon nanocone arrays

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep07810· OSTI ID:1193750
 [1];  [1];  [2];  [1];  [3];  [1];  [1];  [4];  [4];  [4]
  1. Fudan Univ., Shanghai (China)
  2. Fudan Univ., Shanghai (China); Key Lab. for Information Science of Electromagnetic Waves (MoE), Shanghai (China); Ames Lab., Ames, IA (United States)
  3. Chinese Academy of Sciences, Shanghai (China)
  4. Ames Lab., Ames, IA (United States)

Nanostructure arrays such as nanowire, nanopillar, and nanocone arrays have been proposed to be promising antireflection structures for photovoltaic applications due to their great light trapping ability. In this paper, the optical properties of Si nanopillar and nanocone arrays in visible and infrared region were studied by both theoretical calculations and experiments. The results show that the Mie resonance can be continuously tuned across a wide range of wavelength by varying the diameter of the nanopillars. However, Si nanopillar array with uniform diameter exhibits only discrete resonance mode, thus can't achieve a high broadband absorption. On the other hand, the Mie resonance wavelength in a Si nanocone array can vary continuously as the diameters of the cross sections increase from the apex to the base. Therefore Si nanocone arrays can strongly interact with the incident light in the broadband spectrum and the absorbance by Si nanocone arrays is higher than 95% over the wavelength from 300 to 2000 nm. In addition to the Mie resonance, the broadband optical absorption of Si nanocone arrays is also affected by Wood-Rayleigh anomaly effect and metal impurities introduced in the fabrication process.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1193750
Journal Information:
Scientific Reports, Vol. 5, Issue 3; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 148 works
Citation information provided by
Web of Science

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An Ingenious Super Light Trapping Surface Templated from Butterfly Wing Scales journal August 2015
A Broadband Plasmonic Metasurface Superabsorber at Optical Frequencies: Analytical Design Framework and Demonstration journal June 2018
An Investigation on a Crystalline-Silicon Solar Cell with Black Silicon Layer at the Rear journal December 2017
Fabrication of Ag‐modified nanocone frustum arrays with controlled shape as active substrates for surface‐enhanced Raman scattering journal July 2019
Localized photodeposition of catalysts using nanophotonic resonances in silicon photocathodes journal January 2018
Perovskite/c-Si tandem solar cell with inverted nanopyramids: realizing high efficiency by controllable light trapping journal November 2015
Nanodome Structured BiVO 4 /GaO x N 1− x Photoanode for Solar Water Oxidation journal July 2017
Black silicon Schottky photodetector in sub-bandgap near-infrared regime journal January 2019
Light Management with Patterned Micro‐ and Nanostructure Arrays for Photocatalysis, Photovoltaics, and Optoelectronic and Optical Devices journal April 2019
Far-field and near-field monitoring of hybridized optical modes from Au nanoprisms suspended on a graphene/Si nanopillar array journal January 2017
Large-Area Wide-Incident-Angle Metasurface Perfect Absorber in Total Visible Band Based on Coupled Mie Resonances journal May 2017
Thin cylindrical slot in an optical microdisk cavity for sensing biomaterials journal March 2017
Broadband Perfect Absorber Based on TiN-Nanocone Metasurface journal July 2018
Compact nanocavity with elliptical slot inside photonic wire bandgap materials including sidewalls gratings for biosensing journal June 2016
Enhanced Tunable Light Absorption in Nanostructured Si Arrays Based on Double‐Quarter‐Wavelength Resonance journal August 2019
Resonant Optical Absorption and Photothermal Process in High Refractive Index Germanium Nanoparticles journal February 2017
Superhydrophobic waveguide: Liquid-core air-cladding waveguide platform for optofluidics journal October 2018
Large-Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars journal September 2017
Self-catalytic-grown SnO x nanocones for light outcoupling enhancement in organic light-emitting diodes journal January 2020
Visualization of UV by Nanopatterned Down‐Shifting Materials Mimicking Human Retinal Cone Cells journal October 2019
Mie resonance-mediated antireflection effects of Si nanocone arrays fabricated on 8-in. wafers using a nanoimprint technique journal April 2015
Optical properties and fabrication of dielectric metasurfaces based on amorphous silicon nanodisk arrays journal January 2019

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