Abstract
The powerful tools of transformation optics (TO) allow an effective distortion of a region of space by carefully engineering the material inhomogeneity and anisotropy, and have been successfully applied in recent years to control electromagnetic fields in many different scenarios, e.g., to realize invisibility cloaks and planar lenses. For various field transformations, it is not necessary to use volumetric inhomogeneous materials, and suitably designed ultrathin metasurfaces with tailored spatial or spectral responses may be able to realize similar functionalities within smaller footprints and more robust mechanisms. Here, inspired by the concept of metamaterial TO lenses, we discuss field transformations enabled by parity-time (PT) symmetric metasurfaces, which can emulate negative refraction. We first analyze a simple realization based on homogeneous and local metasurfaces to achieve negative refraction and imaging, and we then extend our results to arbitrary PT-symmetric two-port networks to realize aberration-free planar imaging.
| Original language | English |
|---|---|
| Article number | 044028 |
| Journal | Journal of Optics (United Kingdom) |
| Volume | 18 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 1 2016 |
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Keywords
- metamaterials
- parity-time symmetry
- transformation optics
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials
Cite this
PT-symmetric planar devices for field transformation and imaging. / Valagiannopoulos, C. A.; Monticone, F.; Alù, A.
In: Journal of Optics (United Kingdom), Vol. 18, No. 4, 044028, 01.04.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - PT-symmetric planar devices for field transformation and imaging
AU - Valagiannopoulos, C. A.
AU - Monticone, F.
AU - Alù, A.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The powerful tools of transformation optics (TO) allow an effective distortion of a region of space by carefully engineering the material inhomogeneity and anisotropy, and have been successfully applied in recent years to control electromagnetic fields in many different scenarios, e.g., to realize invisibility cloaks and planar lenses. For various field transformations, it is not necessary to use volumetric inhomogeneous materials, and suitably designed ultrathin metasurfaces with tailored spatial or spectral responses may be able to realize similar functionalities within smaller footprints and more robust mechanisms. Here, inspired by the concept of metamaterial TO lenses, we discuss field transformations enabled by parity-time (PT) symmetric metasurfaces, which can emulate negative refraction. We first analyze a simple realization based on homogeneous and local metasurfaces to achieve negative refraction and imaging, and we then extend our results to arbitrary PT-symmetric two-port networks to realize aberration-free planar imaging.
AB - The powerful tools of transformation optics (TO) allow an effective distortion of a region of space by carefully engineering the material inhomogeneity and anisotropy, and have been successfully applied in recent years to control electromagnetic fields in many different scenarios, e.g., to realize invisibility cloaks and planar lenses. For various field transformations, it is not necessary to use volumetric inhomogeneous materials, and suitably designed ultrathin metasurfaces with tailored spatial or spectral responses may be able to realize similar functionalities within smaller footprints and more robust mechanisms. Here, inspired by the concept of metamaterial TO lenses, we discuss field transformations enabled by parity-time (PT) symmetric metasurfaces, which can emulate negative refraction. We first analyze a simple realization based on homogeneous and local metasurfaces to achieve negative refraction and imaging, and we then extend our results to arbitrary PT-symmetric two-port networks to realize aberration-free planar imaging.
KW - metamaterials
KW - parity-time symmetry
KW - transformation optics
UR - http://www.scopus.com/inward/record.url?scp=84962798163&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962798163&partnerID=8YFLogxK
U2 - 10.1088/2040-8978/18/4/044028
DO - 10.1088/2040-8978/18/4/044028
M3 - Article
AN - SCOPUS:84962798163
VL - 18
JO - Journal of Optics
JF - Journal of Optics
SN - 2040-8978
IS - 4
M1 - 044028
ER -