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METAWAVES GROUP

Cutting-edge research in Electromagnetic Fields & Waves

 

WHAT WE DO

Dedicated to Discovering!

Members of our group are conducting cutting-edge research in Electromagnetic Fields & Waves for applications including:


  1. 5G/6G and Emerging wireless communications hardware

  2. Terrestrial and satellite wireless telecommunications

  3. Sub-wavelength imaging and sensing 

  4. Advanced Radar Technologies

  5. Security & Defense

  6. Nanoplasmonics

  7. High-speed digital interconnects 

  8. Medical diagnostics & therapeutics

To enable this approach, our group has been a pioneer in the emerging field of electromagnetic metamaterials and metasurfaces.

Our philosophy is based on the discovery and explanation of new physical phenomena that lead to groundbreaking and useful applications.


 

MEDIA COVERAGE

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U OF T RESEARCHERS CREATE A HOMEMADE 'INVISIBILITY CLOAK’

Empty Chairs in Lecture Room

PROFESSOR ELEFTHERIADES GIVES 
TEDX TALK

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PROFESSOR ELEFTHERIADES ELECTED FELLOW OF THE ROYAL SOCIETY OF CANADA

 
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RESEARCH

 
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METASURFACES

Engineered surfaces for the complete control of magnitude, phase and polarization state

OPENINGS


Dear Prospective Graduate Student,

We are always looking for excellent and motivated graduate students, including international ones.  I encourage you to apply to the graduate school, although I cannot guarantee that you will receive an offer. Please note that all accepted graduate students receive automatically financial support. Further details on how to apply for a Master's or a PhD degree at the ECE Department can be found at:

http://www.ece.utoronto.ca/graduates/admission

In your application, make sure that you indicate 'Electromagnetics' as you first choice. If you like, you could also designate the Professor whom you would prefer to have as your supervisor. Due to the large number of inquiries that I receive, I may not be able to respond to individual requests. However, if you choose to apply we will carefully evaluate your file and let you know whether we can offer you a position in the next  fall  term.


Post-doctoral position inquiries should be addressed directly to Prof. Eleftheriades

gelefth(at)waves.utoronto.ca

(416) 946-3564

Thanks for submitting!

 

Research and Articles 

For full list click "Publications"



2020

G. Xu, G.V. Eleftheriades, S.V. Hum ``Approach to the analysis of cylindrical metasurfaces with noncircular cross sections based on conformal transformations,"  Phys. Rev. B, 102 (24), 245305, Dec. 2020.

G. Xu, G.V. Eleftheriades, S.V. Hum ``Discrete-Fourier-Transform-Based framework for analysis and synthesis of cylindrical omega-bianisotropic metasurfaces, ," Phys. Rev. Appl., 14 (6), 064055, Dec. 2020.

S. Taravati and G.V. Eleftheriades, ``Space-time medium functions as a perfect antenna-mixer-amplifier transceiver," Phys. Rev. Appl., 14, 054017 – Published 9 Nov. 2020.

 V. Ataloglou, A. Dorrah and G.V. Eleftheriades, ``Design of compact Huygens' metasurface pairs with multiple reflections for arbitrary wave transformations," IEEE Trans. on Antennas and Propagat.}, vol. 68, 11, pp. 7382-7394, Nov. 2020.

G. Xu, S.V. Hum and G.V. Eleftheriades, ``Dual-band metagratings with interleaved meta-wires," IEEE Trans. on Antennas and Propagat. , In Press, available on IEEE xplore.

A. Ohadi and G.V. Eleftheriades, ``A frequency slow-wave waveguide antenna at millimeter-wave frequencies," IEEE Access ,8, pp. 174910-174921, Sept. 2020.

 A. Wong and G.V. Eleftheriades, ``Active Huygens' Box: Arbitrary electromagnetic wave generation

with an electronically controlled metasurface," IEEE Trans. on Antennas and Propagat. Accepted for publication, Aug. 2020. Available on IEEE xplore.


S. Taravati and G.V. Eleftheriades, ``Full-duplex nonreciprocal beam steering by time modulated

phase-gradient metasurfaces," Phys. Rev. Appl., 14, 014027 – Published 9 July 2020.


M. Safari, Y. He, M. Kim, N.P. Kherani and G.V. Eleftheriades, ``Optically and RF transparent Meta-glass ,"

De Gruyter Nanophotonics, DOI: https://doi.org/10.1515/nanoph-2020-0056, published online: 18 June 2020.

S.R. Ahvanouee, M. Memarian and G.V. Eleftheriades, ``Dirac leaky wave antenna for millimeter-wave applications,"

IET Microwaves, Antennas and Propagation, doi: 10.1049/iet-map.2020.0047. vol. 14, Issue 9, 29 , pp. 874 – 883, July 2020.

G. Egorov and G.V. Eleftheriades, ``Theory and simulations of metasurface lenses for extending the angular scan range of phased arrays,"

IEEE Trans. on Antennas and Propagat., vol. 68, no. 5, pp. 3705-3717, May 2020.

A. Dorrah and G.V. Eleftheriades, ``Peripherally excited array architecture for reduced-number active element beam steering", IEEE Trans. on Antennas and Propagat., vol. 68, no. 3, pp. 1249-1260, March 2020.

M. Chen and G.V. Eleftheriades, ``Omega-bianisotropic wire-loop Huygens' metasurface for reflectionless wide-angle refraction," IEEE Trans. on Antennas and Propagat., vol. 68, no. 3, pp. 1477-1490, March 2020.

Y. He and G.V. Eleftheriades, ``A thin double-mesh metamaterial radome for wide-angle and broadband applications at millimeter-wave frequencies," IEEE Trans. on Antennas and Propagat., vol. 68, no. 3, pp. 2176-2185, March 2020.

 P. Ang and G.V. Eleftheriades, ``Active cloaking of a non-uniform scatterer," Sci. Rep., 10, 2021, Feb. 06, 2020.

https://doi.org/10.1038/s41598-020-58706-z

M. Kim and G.V. Eleftheriades, ``Design and experimental demonstration of impedance-matched circular- polarization-selective surfaces with spin-selective phase modulations,"  Phys. Rev. Applied, 13, 014009, Jan. 2020.

2019

E. Abdo-Sanchez, A. Epstein and G.V. Eleftheriades, "Reconfi gurability mechanisms
with scanning rate control for omega-bianisotropic Huygens' metasurface leaky-wave
antennas," IEEE Access, vol. 7, pp. 168247-168260, Nov. 15, 2019.


S. Taravati and G.V. Eleftheriades, "Generalized space-time-periodic diffraction gratings:
Theory and applications", Phys. Rev. Appl., 12, 024026, Aug. 2019.


Y. He, C. Gu, H. Ma, J. Zhu and G.V. Eleftheriades, "Miniaturized circularly polarized
Doppler radar for human vital sign detection", IEEE Transactions on Antennas and
Propagat., vol. 67, issue 11, pp. 7022-7030, Nov. 2019.


G. Xu, S.V. Hum and G.V. Eleftheriades, "Augmented Huygens' metasurfaces employing
baffles for precise control of wave transformations", IEEE Transactions on
Antennas and Propagat., vol. 67, issue 11, pp. 6935-6946, Nov. 2019.

M. Chen, A. Epstein and G.V. Eleftheriades, "Design and experimental veri cation
of a passive Huygens' metasurface lens for gain enhancement of frequency-scanning
slotted-waveguide antennas," IEEE Transactions on Antennas and Propagat.,vol. 67,
pp. 4678-4692, July 2019.


G.V. Eleftheriades, "Remembering Keith G. Balmain [In Memoriam]," IEEE Antennas
and Propagation Magazine, vol. 61, pp. 138, April 2019.
.
E. Abdo-Sanchez, M. Chen, A. Epstein, G.V. Eleftheriades, "A Leaky-wave antenna
with controlled radiation using a bianisotropic Huygens' metasurface", IEEE Transactions on Antennas and Propagat., vol. 67, no. 1, pp. 108-120, Jan. 2019.


M. Chen and G.V. Eleftheriades, "Roadmap on metasurfaces: Huygens' metasurfaces
for selected antenna applications," Journal of Optics, Institute of Physics (IOP), 21,
073002, July 2019. (invited).

A.M.H. Wong and G.V. Eleftheriades, "Roadmap on superoscillations: An antenna
array approach to superoscillations," Journal of Optics, Institute of Physics (IOP),
vol. 21, no. 5, 18 April 2019. (invited).

2018

Y. He and G.V. Eleftheriades, "Magnetoelectric uniaxial metamaterials as wide-angle
polarization-insensitive matching layers," Phys. Rev. B, 98, 205404 , Nov. 2018.


 G. Xu, G.V. Eleftheriades, S.V. Hum, "Generalized synthesis technique for high-order
low-pro file dual-band frequency selective surfaces", IEEE Transactions on Antennas
and Propagat., vol. 66, no. 9, pp. 6033-6042, Sept. 2018.

A.H. Dorrah, M. Chen, G.V. Eleftheriades, "Bianisotropic Huygens' metasurface for
wideband impedance matching between two dielectric media ", IEEE Transactions on
Antennas and Propagat., vol. 66, issue 9, pp. 4729-4742, Sept. 2018.


A.H. Dorrah and G.V. Eleftheriades, "Two-dimensional center-fed transmission-line
grid antenna for highly efficient broadside radiation," Physical Review Applied, 10,
024024, Aug, 2018.

A.H. Dorrah and G.V. Eleftheriades, "Bianisotropic Huygens' metasurface pairs for
non-local power conserving wave transformations," IEEE Antennas and Wireless Propagat. Lettr., vol. 17, no. 10, 1788-1792, July 2018.


A.M.H. Wong, P. Christian and G.V. Eleftheriades, "Binary Huygens' metasurfaces:
Experimental demonstration of simple and efficient near-grazing retroreflectors for TE
and TM polarizations," IEEE Trans. on Antennas and Propagat., vol. 66, issue 6, pp. 2892-2903, June 2018.

M. Chen, A.M.H. Wong, M. Kim and G.V. Eleftheriades, "Huygens' metasurfaces
from microwaves to optics: a review," De Gruyter Nanophotonics,
https://doi.org/10.1515/nanoph-2017-0117, vol. 7, issue 6, pp. 1207-1231, April 2018(invited).


P. Ang and G.V. Eleftheriades, "A passive retro-directing Van Atta type reflector", IEEE
Antennas and Wireless Propagat. Letters, vol. 17, no. 4, pp. 689-692, March, 2018.


M. Chen, E. Abdo-Sanchez, A. Epstein and G.V. Eleftheriades, "Theory, design, and experimental verifi cation of reflectionless bianisotropic Huygens' metasurface for wideangle
refraction," Physical Review B, 97, 125433, 29 March 2018.


Y. He and G.V. Eleftheriades, "Matched, low-loss, and wideband graded-index
at lenses for millimeter-wave applications ", IEEE Transactions on Antennas and Propagat., vol. 66, issue 3, pp. 1114-1123, March. 2018.

A.M.H. Wong and G.V. Eleftheriades, "Perfect anomalous reflection with a bipartite Huygens' metasurface", Physical Review X, 8, 011036, Feb. 2018.


G. Xu, S.V. Hum and G.V. Eleftheriades, "A technique for designing multilayer multistopband
frequency selective surfaces", IEEE Trans. on Antennas and Propagat, vol.
66, pp. 780-789, Feb. 2018.


M. Kim and G.V. Eleftheriades, "Design and demonstration of impedance-matched dual-band chiral metasurfaces", Sci. Rep., 8, article number: 3449, Feb.
doi:10.1038/s41598-018-20056-2, 2018.

2017

X. Han Dong, A.M.H. Wong, M. Kim and G.V. Eleftheriades, "Superresolution far-
field imaging of complex objects using reduced superoscillating ripples", Optica, vol. 4,
pp. 1126-1133, issue 9, Sept. 2017 (featured on front cover).

T.R. Cameron and G.V. Eleftheriades, "Experimental validation of a wideband metasurface
for wide-angle scanning leaky-wave antennas", IEEE Trans. on Antennas and
Propagation, vol. 65, pp. 5245-5256, no. 10, Oct. 2017.

Y. He and G.V. Eleftheriades, "Anisotropic metamaterial as an

antireflection layer at extreme angles", IEEE Trans. on Antennas and Propagation, vol. 65, , no. 8, pp. 4102-4114, Aug. 2017.

A. Epstein and G.V. Eleftheriades, "Arbitrary antenna arrays without feed networks
based on cavity-excited omega-bianisotropic metasurfaces", IEEE Trans. on Antennas
and Propagation, vol. 65, pp. 1749-1756, issue 4, April 2017.

A.M.H. Wong and G.V. Eleftheriades, Broadband superoscillation brings a wave into
perfect 3D focus", Physical Review B, 95, 075148, Feb. 27, 2017.

A. Dorrah and G.V. Eleftheriades, "Pencil-beam single-point-fed Dirac leaky-wave antenna
on a transmission-line grid", IEEE Antennas and Wireless Propagat. Lett., vol.
16, pp. 545-548, 2017.

2016

A. Epstein and G.V. Eleftheriades , ``Synthesis of passive lossless metasurfaces usingauxiliary fields for reflectionless beam splitting and perfect reflection", Physical Review Letters, PRL 117, 256103, Dec. (2016).

M. Kim and G.V. Eleftheriades, ``Highly efficient all-dielectric optical tensor impedance metasurfaces for chiral polarization control", Optics Letters, 41(20), 4831-4834, Nov. 2016.

A. Dorrah and G.V. Eleftheriades, ``Pencil-beam single-point-fed Dirac leaky-wave antenna on a transmission-line grid", IEEE Antennas and Wireless Propagat. Lett., 2016.

M. Kim, J. Jeong, J.K.S. Poon, and G.V. Eleftheriades, ``Vanadium dioxide assisted digital optical metasurfaces for dynamic wavefront engineering", Journal of the Optical Society of America B (JOSAB), vol. 33. no 5, pp. 980-988, May 2016.

A. Epstein and G.V. Eleftheriades, "Huygens' metasurfaces via the equivalence principle: design and applications", Journal of the Optical Society of America B (JOSAB), vol. 33, no. 2, pp. A31-A50, Feb. 2016

A. Epstein, J. Wong and G.V. Eleftheriades, "Cavity-excited Huygens' metasurface antennas for near-unity aperture illumination efficiency from arbitrarily-large apertures", Nature Comm., vol. 7, p. 10360, doi: 10.1038/ncomms10360 (2016), Jan. 2016.

M. Selvanayagam and G.V. Eleftheriades, "Design and measurement of tensor impedance transmitarrays for chiral polarization control", IEEE Trans. on Microwave Theory and Techn., vol. 64, pp. 414-428, Feb. 2016.

J. Wong, A. Epstein, G.V. Eleftheriades, "Reflectionless wide-angle refraction metasurfaces", IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 1293-1296, April 2016.

H. Mirzaei and G.V. Eleftheriades, "Eliminating beam-squinting in wideband linear series-fed antenna arrays using feed networks constructed by slow-wave transmission lines", IEEE Antennas and Wireless Propagat. Letters. , vol. 15, pp. 798 -801, Jan. 2016.


2015

T.R.  Cameron and G.V. Eleftheriades, "Analysis and characterization of a wide-angle impedance matching metasurface for dipole phased arrays", IEEE Trans. on Antennas and Propagat., vol. 63, no. 9, pp. 3928-3938, Sept. 2015.

H. Mirzaei and G.V. Eleftheriades, "Arbitrary-angle beamforming in series-fed antenna arrays using non-Foster elements synthesized by negative-group-delay networks", IEEE Trans. on Antennas and Propagat., vol. 63, no. 5, pp. 1997-2010, May 2015.

A. Mehdipour, J. Wong and G.V. Eleftheriades, "Beam squinting reduction of leaky-wave antennas using Huygens' metasurfaces", IEEE Trans. on Antennas and Propagat., vol. 63, no. 3, pp. 978-992, March 2015.

M. Memarian and G.V. Eleftheriades, "Analysis of anisotropic Epsilon-Near-Zero hetero-junction lens for concentration and beam splitting", Optics Letters, vol. 60, issue 6, pp. 1010-1013, 2015.

A. Wong and G.V. Eleftheriades, "Superoscillations without sidebands: Power-efficient  sub-diffraction imaging with propagating waves", Sci. Rep., 5, 8449, Feb. 2015.

C. Ryan and G.V. Eleftheriades, "Dual-band and transparent circularly-polarized patch antennas with metamaterial loadings", IEEE Antennas and Wireless Propagat. Letters, vol. 14, pp. 470-473, Feb. 2015.

J.P.S. Wong, M. Selvanayagam and G.V. Eleftheriades, "Characterization of Huygens metasurfaces for 2D refraction", IEEE Trans. on Microwave Theory and Techn., vol. 63,. pp. 913-924, March 2015.

M. Memarian and G.V. Eleftheriades, "Dirac leaky-wave antennas for continuous beam scanning from photonic crystals", Nature Communications, 6, doi:10.1038/ncomms6855, Jan. 5, 2015.

A. Epstein and G.V. Eleftheriades, "Floquet-Bloch analysis of refracting metasurfaces", Phys. Rev. B, 90, 235127, Dec. 2014.

M. Kim, A. Wong and G.V. Eleftheriades, "Optical Huygens' metasurfaces with independent control of the magnitude and phase of the local reflection coefficients",Physical Review X, 4, 041042 (11 pages), Dec. 2014.

M. Selvanayagam and G.V. Eleftheriades, "Polarization control using tensor Huygens surfaces", IEEE Trans. on Antennas and Propagat., vol. 62, no. 12, pp. 6155-6168, Dec. 2014.

A. Epstein and G.V. Eleftheriades, "Passive lossless Huygens metasurfaces for conversion of arbitrary source field to directive radiation", IEEE Trans. on Antennas and Propagat., vol. 62, no. 11, pp. 5681-5695, Nov. 2014

J. Wong, M. Selvanayagam, and G.V. Eleftheriades, "Design of unit cells and demonstrations of methods for synthesizing Huygens metasurfaces", Elsevier Photonics and Nanostructures-Fundamentals and Applications, pp. 360-375, 12 (2014).

L. Markley and G.V. Eleftheriades, "An ultra-compact microstrip crossover inspired by contra-directional even and odd mode propagation", IEEE Microwave and Wireless Propagat. Letters, vol. 24, pp. 436-438, July 2014.

A. Mehdipour and G.V. Eleftheriades, "Leaky-wave antennas using negative-refractive-index transmission-line (NRI-TL) metamaterial supercells", IEEE Trans. on Antennas and Propagat., vol. 62, pp. 3929-3942, Aug. 2014.

A. Ludwig, C.D. Sarris and G.V. Eleftheriades, "Near-field antenna arrays for steerable sub-wavelength-field beams," IEEE Trans. on Antennas and Propagat., vol. 62, pp. 3543-3556, July 2014. 

G.V. Eleftheriades, "Protecting the weak from the strong", Nature, vol. 505, pp. 490-491, 23 Jan. 2014.

 

ACTIVE CLOAKING OF A NON-UNIFORM SCATTERER

[Scientific Reports-Nature] February 06 2020

An object illuminated by an electromagnetic wave can be actively cloaked using a surface conformal array of radiating sources to cancel out scattering. This method is promising as elementary antennas can be used as sources while its active nature can surpass passivity-based performance limitations.
Experimental setup (a) Open waveguide (b) Weighting controller (c) Closed waveguide & translator stage.

41598_2020_58706_Fig2_HTML.webp