Parity-Time Symmetric Nonlocal Metasurfaces: All-Angle Negative Refraction and Volumetric Imaging

Lens design for focusing and imaging has been optimized through centuries of developments; however, conventional lenses, even in their most ideal realizations, still suffer from fundamental limitations, such as limits in resolution and the presence of optical aberrations, which are inherent to the l...

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Published inPhysical review. X Vol. 6; no. 4; p. 041018
Main Authors Monticone, Francesco, Valagiannopoulos, Constantinos A., Alù, Andrea
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 01.10.2016
Subjects
Aberration
Imaging
Invariants
Lens design
Lenses
Metamaterials
Metasurfaces
Optics
Parity
Refraction
Symmetry
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Abstract Lens design for focusing and imaging has been optimized through centuries of developments; however, conventional lenses, even in their most ideal realizations, still suffer from fundamental limitations, such as limits in resolution and the presence of optical aberrations, which are inherent to the laws of refraction. In addition, volume-to-volume imaging of three-dimensional regions of space is not possible with systems based on conventional refractive optics, which are inherently limited to plane-to-plane imaging. Although some of these limitations have been at least theoretically relaxed with the advent of metamaterials, several challenges still stand in the way of ideal imaging of three-dimensional regions of space. Here, we show that the concept of parity-time symmetry, combined with tailored nonlocal responses, enables overcoming some of these challenges, and we propose the design of a loss-immune, linear, transversely invariant, planarized metamaterial lens, with reduced aberrations and the potential to realize volume-to-volume imaging.
AbstractList Lens design for focusing and imaging has been optimized through centuries of developments; however, conventional lenses, even in their most ideal realizations, still suffer from fundamental limitations, such as limits in resolution and the presence of optical aberrations, which are inherent to the laws of refraction. In addition, volume-to-volume imaging of three-dimensional regions of space is not possible with systems based on conventional refractive optics, which are inherently limited to plane-to-plane imaging. Although some of these limitations have been at least theoretically relaxed with the advent of metamaterials, several challenges still stand in the way of ideal imaging of three-dimensional regions of space. Here, we show that the concept of parity-time symmetry, combined with tailored nonlocal responses, enables overcoming some of these challenges, and we propose the design of a loss-immune, linear, transversely invariant, planarized metamaterial lens, with reduced aberrations and the potential to realize volume-to-volume imaging.
ArticleNumber 041018
Author Alù, Andrea
Monticone, Francesco
Valagiannopoulos, Constantinos A.
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  givenname: Andrea
  surname: Alù
  fullname: Alù, Andrea
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Snippet Lens design for focusing and imaging has been optimized through centuries of developments; however, conventional lenses, even in their most ideal realizations,...
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StartPage 041018
SubjectTerms Aberration
Imaging
Invariants
Lens design
Lenses
Metamaterials
Metasurfaces
Optics
Parity
Refraction
Symmetry
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Title Parity-Time Symmetric Nonlocal Metasurfaces: All-Angle Negative Refraction and Volumetric Imaging
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