Butt, H and Rajesekharan, R and Dai, Q and Sarfraz, S and Vasant Kumar, R and Amaratunga, GAJ and Wilkinson, TD (2012) Cylindrical Fresnel lenses based on carbon nanotube forests. Applied Physics Letters, 101. ISSN 0003-6951
Full text not available from this repository.Abstract
The forests of carbon nanotubes have been termed as the darkest man-made materials. Such materials exhibit near-perfect optical absorption (reflectance∼0.045%) due to low reflectance and nanoscale surface roughness. We have demonstrated the utilization of these perfectly absorbing forests to produce binary amplitude cylindrical Fresnel lenses. The opaque Fresnel zones are defined by the dark nanotube forests and these lenses display efficient focusing performance at optical wavelengths. Lensing performance was analyzed both computationally and experimentally with good agreement. Such nanostructure based lenses have many potential applications in devices like photovoltaic solar cells. © 2012 American Institute of Physics.
Item Type: | Article |
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Subjects: | UNSPECIFIED |
Divisions: | Div B > Electronics, Power & Energy Conversion Div B > Photonics |
Depositing User: | Cron Job |
Date Deposited: | 17 Jul 2017 19:00 |
Last Modified: | 13 Apr 2021 09:19 |
DOI: | 10.1063/1.4772002 |