Skip to main content

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

Publication ,  Journal Article
Cardin, AE; Silva, SR; Vardeny, SR; Padilla, WJ; Saxena, A; Taylor, AJ; Kort-Kamp, WJM; Chen, H-T; Dalvit, DAR; Azad, AK
Published in: Nature communications
March 2020

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.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Nature communications

DOI

EISSN

2041-1723

ISSN

2041-1723

Publication Date

March 2020

Volume

11

Issue

1

Start / End Page

1469
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Cardin, A. E., Silva, S. R., Vardeny, S. R., Padilla, W. J., Saxena, A., Taylor, A. J., … Azad, A. K. (2020). Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces. Nature Communications, 11(1), 1469. https://doi.org/10.1038/s41467-020-15273-1
Cardin, Andrew E., Sinhara R. Silva, Shai R. Vardeny, Willie J. Padilla, Avadh Saxena, Antoinette J. Taylor, Wilton J. M. Kort-Kamp, Hou-Tong Chen, Diego A. R. Dalvit, and Abul K. Azad. “Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces.Nature Communications 11, no. 1 (March 2020): 1469. https://doi.org/10.1038/s41467-020-15273-1.
Cardin AE, Silva SR, Vardeny SR, Padilla WJ, Saxena A, Taylor AJ, et al. Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces. Nature communications. 2020 Mar;11(1):1469.
Cardin, Andrew E., et al. “Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces.Nature Communications, vol. 11, no. 1, Mar. 2020, p. 1469. Epmc, doi:10.1038/s41467-020-15273-1.
Cardin AE, Silva SR, Vardeny SR, Padilla WJ, Saxena A, Taylor AJ, Kort-Kamp WJM, Chen H-T, Dalvit DAR, Azad AK. Surface-wave-assisted nonreciprocity in spatio-temporally modulated metasurfaces. Nature communications. 2020 Mar;11(1):1469.

Published In

Nature communications

DOI

EISSN

2041-1723

ISSN

2041-1723

Publication Date

March 2020

Volume

11

Issue

1

Start / End Page

1469