Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > From Narrow to Broad

Abstract:
Electromagnetic absorbers based on plasmonic and metamaterial structures are of great interest for many areas as narrowband absorbers. A variety of approaches have been proposed to achieve broadband absorption, which is needed for applications such as solar energy harvesting.

From Narrow to Broad

Hangzhou, China | Posted on July 30th, 2014

Early research on electromagnetic (EM) absorbers dates back to 1902 when Wood observed the anomalous dips in the reflection spectra of metallic gratings under illumination of a white-light source. EM wave absorbers are devices in which the incident radiation at the operating wavelengths can be efficiently absorbed, and then transformed into ohmic heat or other forms of energy. Thereby, neither transmission nor reflection is produced when a wave passes through a perfect absorber.

There are various types of configurations being used as EM absorbers, such as lamellar gratings, convex grooves, spherical voids, and hole arrays. These absorbers are made of noble metals, and associated with plasmonics that contains interesting physical phenomena associated with planar or localized due to the excitation of surface plasmon polaritons (SPPs). Metamaterials are artificial assemblies of structured elements of subwavelength size, i.e. much smaller than the wavelength of the incident waves. The effective permittivity and permeability can be designated from zero to infinity, and as a result, various unique properties that are not available in nature can be finally achieved.

In a review article, scientists from Zhejiang University in Hangzhou and the Taiyuan University of Technology in China give an overview on the principle of different types of narrowband EM absorbers as well as the various approaches to achieve broadband/multiband absorbers. Many mechanisms of EM absorption based on metallic structures as well as metamaterial-based schemes are described and the authors discuss how to improve the performance of the absorption band.

A series of plasmonic and metamaterial structures can work as efficient narrowband absorbers due to the excitation of plasmonic or photonic resonances, providing a great potential for selective thermal emitters, biosensing, etc. In other applications such as solar-energy harvesting and photonic detection, the bandwidth of light absorbers is required to be quite broad. A variety of mechanisms of broadband/multiband absorption have been proposed, such as mixing multiple resonances together, exciting phase resonances, slowing down light by anisotropic metamaterials, employing high loss materials.

The most profound application area of EM absorbers is solar-energy harvesting. Every improvement is of great significance to society, bringing both economic and environmental benefits. In the future, low-cost, easily fabricated, and high-performance solar absorbers will be in high demand for building economic solar plants. Despite the progress made in producing high-performance EM absorbers, their industrial realization still remains a challenge. (Text contributed by K. Maedefessel-Herrmann)

See the original publication: Yanxia Cui, Yingran He, Yi Jin, Fei Ding, Liu Yang, Yuqian Ye, Shoumin Zhong, Yinyue Lin, and Sailing He, Plasmonic and metamaterial structures as electromagnetic absorbers, Laser Photonics Rev., 8, 495-520 (2014); DOI 10.1002/lpor.201400026

####

About Laser and Photonics Reviews
Laser & Photonics Reviews is an international journal which covers the current range of laser physics and photonics, both theoretical and experimental, from recent research to specific developments and novel applications. The journal publishes Review Articles, Original Papers and Letters. Latest Journal Impact Factor (2013): 9.313 (ISI Journal Citation Reports 2013).

For more information, please click here

Contacts:


Regina Hagen
Editorial Office, Laser & Photonics Reviews
Managing Editor, Physical Sciences
Global Research
Wiley-VCH Verlag GmbH & Co. KGaA
Rotherstrasse 21
10245 Berlin
Germany

Copyright © Laser and Photonics Reviews

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

From allergens to anodes: Pollen derived battery electrodes February 8th, 2016

Discoveries

A fast solidification process makes material crackle February 8th, 2016

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

Materials/Metamaterials

Graphene decharging and molecular shielding February 8th, 2016

A fast solidification process makes material crackle February 8th, 2016

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Announcements

Graphene decharging and molecular shielding February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

From allergens to anodes: Pollen derived battery electrodes February 8th, 2016

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Metal oxide sandwiches: New option to manipulate properties of interfaces February 8th, 2016

Canadian physicists discover new properties of superconductivity February 8th, 2016

Leading bugs to the death chamber: A kinder face of cholesterol February 8th, 2016

From allergens to anodes: Pollen derived battery electrodes February 8th, 2016

Energy

Canadian physicists discover new properties of superconductivity February 8th, 2016

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

February 4th, 2016

Putting silicon 'sawdust' in a graphene cage boosts battery performance: Approach could remove major obstacles to increasing the capacity of lithium-ion batteries January 30th, 2016

Photonics/Optics/Lasers

Nanoscale cavity strongly links quantum particles: Single photons can quickly modify individual electrons embedded in a semiconductor chip and vice versa February 8th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Nature Materials: Smallest lattice structure worldwide: 3-D lattice with glassy carbon struts and braces of less than 200 nm in diameter has higher specific strength than most solids February 3rd, 2016

Solar/Photovoltaic

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

Simplifying solar cells with a new mix of materials: Berkeley Lab-led research team creates a high-efficiency device in 7 steps January 29th, 2016

An alternative to platinum: Iron-nitrogen compounds as catalysts in graphene January 28th, 2016

Scientists provide new guideline for synthesis of fullerene electron acceptors January 28th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic