Light concentration using hetero-junctions of anisotropic low permittivity metamaterials

Mohammad Memarian; George V Eleftheriades

doi:10.1038/lsa.2013.70

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Light concentration using hetero-junctions of anisotropic low permittivity metamaterials

Original Articles

- Light concentration using hetero-junctions of anisotropic low permittivity metamaterials
- Light concentration using hetero-junctions of anisotropic low permittivity metamaterials
- LSA 2013年2卷第3-4期
- Affiliations：
  
  The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ont. M5S 2E4, Canada
- Author bio：
  
  M Memarian, The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 40 St. George Street, Toronto, Ontario M5S 2E4, Canada E-mail: m.memarian@mail.utoronto.ca
- Funds：
- DOI：10.1038/lsa.2013.70
  中图分类号：
- 纸质出版日期：2013-12，
  
  网络出版日期：2013-11-22，
  
  收稿日期：2013-06-02，
  
  修回日期：2013-08-09，
  
  录用日期：2013-08-14
- Accepted：
Scan QR Code
Light concentration using hetero-junctions of anisotropic low permittivity metamaterials[J]. LSA, 2013,2(3-4).

Memarian, M., Eleftheriades, G. V. Light concentration using hetero-junctions of anisotropic low permittivity metamaterials. Light: Science & Applications, 2, e114 (2013).
Light concentration using hetero-junctions of anisotropic low permittivity metamaterials[J]. LSA, 2013,2(3-4). DOI： 10.1038/lsa.2013.70.

Memarian, M., Eleftheriades, G. V. Light concentration using hetero-junctions of anisotropic low permittivity metamaterials. Light: Science & Applications, 2, e114 (2013). DOI： 10.1038/lsa.2013.70.

摘要

Abstract

Focusing incident power into an area of high concentration is of significant interest for various applications. In optics

this has been traditionally achieved with lenses where a higher curvature and lens permittivity typically result in shorter focal distances (low

). In this work

we present designs and techniques for collecting

refracting and guiding incident light into an area of high power concentration (a hot spot)

at extremely short distances. Specifically

a flat low-profile focusing mechanism is presented using a hetero-junction of anisotropic metamaterials (MTMs). The hetero-junction is formed from two cleaved finite slabs of low (near zero) permittivity anisotropic MTMs with rotated optical axes. The MTMs have near zero longitudinal permittivity while matched in the transverse direction. Such MTMs are shown to provide a unique ability to bend the transverse magnetic or p-polarized light away from the normal and along the interface

contrary to conventional dielectrics

and with minimal reflections; hence allowing for a low profile design. Realizations in the optical regime are presented using periodic bilayers of metal and dielectric. The proposed hetero-junction focusing device concentrates the normally incident plane wave and/or beam into a corresponding focal region similar to a lens

via

multiple refractions. The hetero-junction is capable of creating a hot spot very close to the device

much closer than dielectric lenses and it significantly outperforms the size requirements of thick high curvature lenses with low

ratios. The proposed designs can find applications in various scenarios including solar and thermo photovoltaics

photodetectors

concentrated photovoltaics

non-imaging optics

micro- and nano-Fresnel lenses.

关键词

Keywords

epsilon near zerofocusinglight concentrationmetamaterialsnon-imaging opticsphotovoltaics

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