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Low Contrast Sub-wavelengths Grating Lenses

Published online by Cambridge University Press:  07 February 2017

Mao Ye and
Ya Sha Yi
Mao Ye
Affiliation:
Integrated Nano Optoelectronics Laboratory, University of Michigan, Dearborn, MI 48128, U.S.A.
Ya Sha Yi*
Affiliation:
Integrated Nano Optoelectronics Laboratory, University of Michigan, Dearborn, MI 48128, U.S.A.Energy Institute, University of Michigan, Ann Arbor, MI 48109, U.S.A.
*
* yashayi@umich.edu
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Abstract

In this work, we have demonstrated the light concentration from zero-contrast gratings (ZCG) subwavelength structures and compared the light concentration properties of previously proposed high-contrast gratings (HCG) to the ZCG micro concentrating lenses. To address the challenges of potential HCG fabrication, the difference between ZCG and HCG micro lenses is investigated numerically and found both of these subwavelength grating structures have similar light concentration characteristics. To gain deeper understanding of this phenomenon, we have explored the light concentration formation process and discussed the concentration mechanism in detail. Our work will be promising to provide a new ZCG micro lens potentially with easier and more controllable fabrication and could be utilized for various integrated nanophotonics applications, from optical cavities, read/write heads and concentrating photovoltaics.

Keywords

optical propertiesnanostructureoptical

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Type
Articles
Information
MRS Advances , Volume 2 , Issue 14: Nanomaterials , 2017, pp. 805 - 810
Copyright
Copyright © Materials Research Society 2017 

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References

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