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Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces

Cardin, Andrew E ; Silva, Sinhara R ; Vardeny, Shai R ; Padilla, Willie J ; Saxena, Avadh ; Taylor, Antoinette J ; Kort-Kamp, Wilton J M ; Chen, Hou-Tong ; Dalvit, Diego A R ; Azad, Abul K

Nature communications, 2020-03, Vol.11 (1), p.1469-1469, Article 1469 [Periódico revisado por pares]

England: Nature Publishing Group

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Título:
Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces
Autor: Cardin, Andrew E ; Silva, Sinhara R ; Vardeny, Shai R ; Padilla, Willie J ; Saxena, Avadh ; Taylor, Antoinette J ; Kort-Kamp, Wilton J M ; Chen, Hou-Tong ; Dalvit, Diego A R ; Azad, Abul K
Assuntos: Beam steering ; Design ; Far fields ; Forward scattering ; Laboratories ; Metasurface, Metamaterials, Nonreciprocal ; Metasurfaces ; Microwave Photonics ; NANOSCIENCE AND NANOTECHNOLOGY ; Optics ; Photonics ; Propagation ; Radiation ; Reciprocity ; Spacetime ; Surface waves ; Wave propagation
É parte de: Nature communications, 2020-03, Vol.11 (1), p.1469-1469, Article 1469
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
89233218CNA000001
LA-UR-19-30765
USDOE Laboratory Directed Research and Development (LDRD) Program
USDOE Office of Science (SC), Basic Energy Sciences (BES)
USDOE National Nuclear Security Administration (NNSA)
Descrição: Emerging photonic functionalities are mostly governed by the fundamental principle of Lorentz reciprocity. Lifting the constraints imposed by this principle could circumvent deleterious effects that limit the performance of photonic systems. Most efforts to date have been limited to waveguide platforms. Here, we propose and experimentally demonstrate a spatio-temporally modulated metasurface capable of complete violation of Lorentz reciprocity by reflecting an incident beam into far-field radiation in forward scattering, but into near-field surface waves in reverse scattering. These observations are shown both in nonreciprocal beam steering and nonreciprocal focusing. We also demonstrate nonreciprocal behavior of propagative-only waves in the frequency- and momentum-domains, and simultaneously in both. We develop a generalized Bloch-Floquet theory which offers physical insights into Lorentz nonreciprocity for arbitrary spatial phase gradients, and its predictions are in excellent agreement with experiments. Our work opens exciting opportunities in applications where free-space nonreciprocal wave propagation is desired.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces

Cardin, Andrew E ; Silva, Sinhara R ; Vardeny, Shai R ; Padilla, Willie J ; Saxena, Avadh ; Taylor, Antoinette J ; Kort-Kamp, Wilton J M ; Chen, Hou-Tong ; Dalvit, Diego A R ; Azad, Abul K

England: Nature Publishing Group

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