Practical multi-featured perfect absorber utilizing high conductivity silicon
Date
2016Source Title
Journal of Optics (United Kingdom)
Print ISSN
2040-8978
Publisher
Institute of Physics Publishing
Volume
18
Issue
3
Pages
1 - 5
Language
English
Type
ArticleItem Usage Stats
189
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245
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Abstract
We designed all-silicon, multi-featured band-selective perfect absorbing surfaces based on CMOS compatible processes. The center wavelength of the band-selective absorber can be varied between 2 and 22 μm while a bandwidth as high as 2.5 μm is demonstrated. We used a silicon-on-insulator (SOI) wafer which consists of n-type silicon (Si) device layer, silicon dioxide (SiO2) as buried oxide layer, and n-type Si handle layer. The center wavelength and bandwidth can be tuned by adjusting the conductivity of the Si device and handle layers as well as the thicknesses of the device and buried oxide layers. We demonstrate proof-of-concept absorber surfaces experimentally. Such absorber surfaces are easy to microfabricate because the absorbers do not require elaborate microfabrication steps such as patterning. Due to the structural simplicity, low-cost fabrication, wide spectrum range of operation, and band properties of the perfect absorber, the proposed multi-featured perfect absorber surfaces are promising for many applications. These include sensing devices, surface enhanced infrared absorption applications, solar cells, meta-materials, frequency selective sensors and modulators. © 2016 IOP Publishing Ltd.
Keywords
absorberabsorption
conductivity
resonance
silicon
Absorption
Bandwidth
Dosimetry
Electric conductivity
Light absorption
Resonance
Semiconducting silicon
Silicon
Silicon on insulator technology
Silicon oxides
absorber
Buried oxide layers
Center wavelength
Frequency-selective
High conductivity
Low cost fabrication
Silicon on insulator wafers
Surface-enhanced infrared absorptions
Silicon wafers
Permalink
http://hdl.handle.net/11693/36578Published Version (Please cite this version)
http://dx.doi.org/10.1088/2040-8978/18/3/035002Collections
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