Constantinos Valagiannopoulos, PhD

Assistant Professor

Accepting PhD Students

  • 1006 Citations
  • 20 h-Index
20042021
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Research Output 2004 2019

  • 1006 Citations
  • 20 h-Index
  • 88 Article
  • 38 Conference contribution
  • 1 Conference article
  • 1 Review article
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Article
2019

Classical and quantum dispersion-free coherent propagation by tailoring multimodal coupling

Mandilara, A., Valagiannopoulos, C. & Akulin, V. M., Feb 25 2019, In : Physical Review A. 99, 2, 023849.

Research output: Contribution to journalArticle

propagation
scattering
signal transmission
backscattering
optical fibers
4 Citations (Scopus)

Core-shell nanospheres under visible light: Optimal absorption, scattering, and cloaking

Sheverdin, A. & Valagiannopoulos, C., Feb 19 2019, In : Physical Review B. 99, 7, 075305.

Research output: Contribution to journalArticle

Nanospheres
Photonics
Visualization
Scattering
Nanoparticles

Excitation of guided waves on a lossless dielectric slab by an E-polarized complex source point beam

Tsitsas, N. L., Valagiannopoulos, C. & Nosich, A. I., Aug 1 2019, In : IEEE Transactions on Antennas and Propagation. 67, 8, p. 5532-5543 12 p., 8705661.

Research output: Contribution to journalArticle

Guided electromagnetic wave propagation
Helmholtz equation
Gaussian beams
Lighting
Radiation
5 Citations (Scopus)

Limits for Absorption and Scattering by Core-Shell Nanowires in the Visible Spectrum

Abrashuly, A. & Valagiannopoulos, C., Jan 1 2019, In : Physical Review Applied. 11, 1, 014051.

Research output: Contribution to journalArticle

visible spectrum
nanowires
scattering
optical thickness
nanorods
Open Access
Optics and Photonics
Photonics
frequency ranges
photonics
trends
3 Citations (Scopus)

Robust polarization twist by pairs of multilayers with tilted optical axes

Sarsen, A. & Valagiannopoulos, C., Mar 6 2019, In : Physical Review B. 99, 11, 115304.

Research output: Contribution to journalArticle

Multilayers
Polarization
polarization
Photonics
photonics
2018

Aharonov-Bohm-inspired tomographic imaging via compressive sensing

Valagiannopoulos, C., Marengo, E. A., Dimakis, A. G. & Alù, A., Oct 3 2018, In : IET Microwaves, Antennas and Propagation. 12, 12, p. 1890-1894 5 p.

Research output: Contribution to journalArticle

Electron beams
Imaging techniques
Magnetic permeability
Wave functions
Electromagnetic fields
3 Citations (Scopus)

Engineering the emission of laser arrays to nullify the jamming from passive obstacles

Valagiannopoulos, C. & Kovanis, V., Aug 1 2018, In : Photonics Research. 6, 8, p. A43-A50

Research output: Contribution to journalArticle

jamming
laser arrays
Jamming
beamforming
engineering
5 Citations (Scopus)

Highly selective transmission and absorption from metasurfaces of periodically corrugated cylindrical particles

Tagay, Z. & Valagiannopoulos, C., Sep 25 2018, In : Physical Review B. 98, 11, 115306.

Research output: Contribution to journalArticle

wave excitation
line of sight
manipulators
plane waves
Lighting
1 Citation (Scopus)

On-Site Wireless Power Generation

Ra'di, Y., Chowkwale, B., Valagiannopoulos, C. A., Liu, F., Alu, A., Simovski, C. R. & Tretyakov, S. A., May 11 2018, (Accepted/In press) In : IEEE Transactions on Antennas and Propagation.

Research output: Contribution to journalArticle

Power generation
Microwaves
Tuning
Transmitters
Energy utilization
light emitting diodes
photonics
color
quantum dots
crystals

Zeeman gyrotropic scatterers: Resonance splitting, anomalous scattering, and embedded eigenstates

Valagiannopoulos, C., Gangaraj, S. A. H. & Monticone, F., Oct 25 2018, In : Nanomaterials and Nanotechnology. 8

Research output: Contribution to journalArticle

Scattering
Radiation
Metamaterials
Directive antennas
Switches
2017
11 Citations (Scopus)
gradients
wave scattering
integral equations
plane waves
rods

Breaking the black-body limit with resonant surfaces

Valagiannopoulos, C., Simovski, C. R. & Tretyakov, S. A., Jan 1 2017, In : EPJ Applied Metamaterials. 4, 5.

Research output: Contribution to journalArticle

Open Access
Photonic devices
Induced currents
Energy absorption
Electromagnetic waves
Energy transfer
3 Citations (Scopus)
anisotropy
augmentation
isotropic media
transformers
modulators
4 Citations (Scopus)

Judicious distribution of laser emitters to shape the desired far-field patterns

Valagiannopoulos, C. A. & Kovanis, V., Jun 6 2017, In : Physical Review A. 95, 6, 063806.

Research output: Contribution to journalArticle

far fields
emitters
laser arrays
linear systems
lasers
1 Citation (Scopus)

Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces

Savoia, S., Valagiannopoulos, C. A., Monticone, F., Castaldi, G., Galdi, V. & Alù, A., Mar 8 2017, In : Physical Review B - Condensed Matter and Materials Physics. 95, 11, 115114.

Research output: Contribution to journalArticle

Imaging techniques
magnification
aberration
spatial resolution
impedance
6 Citations (Scopus)

Wide-angle absorption of visible light from simple bilayers

Papadimopoulos, A. N., Kantartzis, N. V., Tsitsas, N. L. & Valagiannopoulos, C. A., Dec 10 2017, In : Applied Optics. 56, 35, 1 p.

Research output: Contribution to journalArticle

Color
Photonics
Durability
Modulation
Polarization
2016

Consistent Integral Equation Modeling of Cloaking Planar Microstrip Antennas

Papadimopoulos, A. N., Tsitsas, N. L., Valagiannopoulos, C. A., Kantartzis, N. V., Antonopoulos, C. S. & Tsiboukis, T. D., Mar 1 2016, In : IEEE Transactions on Magnetics. 52, 3, 7203706.

Research output: Contribution to journalArticle

Receiving antennas
Microstrip antennas
Integral equations
Scattering
Antennas
15 Citations (Scopus)

Epsilon-near-zero behavior from plasmonic Dirac point: Theory and realization using two-dimensional materials

Mattheakis, M., Valagiannopoulos, C. A. & Kaxiras, E., 2016, In : Physical Review B. 94, 20, 201404.

Research output: Contribution to journalArticle

Metals
Graphite
Boron nitride
Metamaterials
boron nitrides
6 Citations (Scopus)

Optical PT-Symmetric Counterparts of Ordinary Metals

Valagiannopoulos, C. A., Sep 1 2016, In : IEEE Journal on Selected Topics in Quantum Electronics. 22, 5, 7366541.

Research output: Contribution to journalArticle

parity
Metals
metals
Semiconductor quantum dots
Permittivity
44 Citations (Scopus)

Parity-time Symmetric nonlocal metasurfaces: All-angle negative refraction and volumetric imaging

Monticone, F., Valagiannopoulos, C. A. & Alù, A., 2016, In : Physical Review X. 6, 4, 041018.

Research output: Contribution to journalArticle

refraction
parity
aberration
lenses
lens design
9 Citations (Scopus)

PT-symmetric planar devices for field transformation and imaging

Valagiannopoulos, C. A., Monticone, F. & Alù, A., Apr 1 2016, In : Journal of Optics (United Kingdom). 18, 4, 044028.

Research output: Contribution to journalArticle

Refraction
Invisibility cloaks
Lenses
Optics
parity
6 Citations (Scopus)

Theoretical concepts of unlimited-power reflectors, absorbers, and emitters with conjugately matched layers

Valagiannopoulos, C. A. & Tretyakov, S. A., Sep 12 2016, In : Physical Review B. 94, 12, 125117.

Research output: Contribution to journalArticle

reflectors
absorbers
emitters
Radiation
Induced currents
5 Citations (Scopus)

'Unlocking' the Ground: Increasing the Detectability of Buried Objects by Depositing Passive Superstrates

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Jun 1 2016, In : IEEE Transactions on Geoscience and Remote Sensing. 54, 6, p. 3697-3706 10 p., 7435296.

Research output: Contribution to journalArticle

scattering
half space
slab
permittivity
Scattering
2015
2 Citations (Scopus)

Aharonov-Bohm detection of two-dimensional magnetostatic cloaks

Valagiannopoulos, C. A., Askarpour, A. N. & Alù, A., Dec 10 2015, In : Physical Review B - Condensed Matter and Materials Physics. 92, 22, 224106.

Research output: Contribution to journalArticle

Magnetostatics
magnetostatics
scattering
Scattering
Magnetic flux

Controlling Reflection and Transmission with a Single Layer

Valagiannopoulos, C. A., Apr 1 2015, In : IEEE Antennas and Propagation Magazine. 57, 2, p. 318-323 6 p., 7089226.

Research output: Contribution to journalArticle

controllability
Controllability
electromagnetism
electronic equipment
plane waves
22 Citations (Scopus)

Electromagnetic energy sink

Valagiannopoulos, C. A., Vehmas, J., Simovski, C. R., Tretyakov, S. A. & Maslovski, S. I., Dec 1 2015, In : Physical Review B - Condensed Matter and Materials Physics. 92, 24, 245402.

Research output: Contribution to journalArticle

Evanescent fields
sinks
Electromagnetic waves
electromagnetism
perfectly matched layers
28 Citations (Scopus)

Perfect magnetic mirror and simple perfect absorber in the visible spectrum

Valagiannopoulos, C. A., Tukiainen, A., Aho, T., Niemi, T., Guina, M., Tretyakov, S. A. & Simovski, C. R., Mar 11 2015, In : Physical Review B - Condensed Matter and Materials Physics. 91, 11, 115305.

Research output: Contribution to journalArticle

Magnetic mirrors
magnetic mirrors
visible spectrum
absorbers
conductors
1 Citation (Scopus)

Pockels cover for switchable control of the reflection from a grounded, isotropic, lossy dielectric slab

Valagiannopoulos, C. A., Tsitsas, N. L., Lakhtakia, A. & Burger, A., Feb 28 2015, In : Journal of Applied Physics. 117, 8, 083105.

Research output: Contribution to journalArticle

slabs
electric conductors
wavelengths
depolarization
birefringence
4 Citations (Scopus)

The Role of Reactive Energy in the Radiation by a Dipole Antenna

Valagiannopoulos, C. A. & Alu, A., Aug 1 2015, In : IEEE Transactions on Antennas and Propagation. 63, 8, p. 3736-3741 6 p., 7111231.

Research output: Contribution to journalArticle

dipole antennas
Dipole antennas
Antennas
Radiation
Radiators
2014
5 Citations (Scopus)

Demand curves and operator strategies in the finnish mobile broadband market

Katsigiannis, M. & Valagiannopoulos, C., Jan 1 2014, In : International Journal of Business Data Communications and Networking. 10, 1, p. 30-46 17 p.

Research output: Contribution to journalArticle

Costs
Cost reduction
Operator
Demand curve
Mobile operators
7 Citations (Scopus)

Emulating hyperbolic-media properties with conventional structures

Valagiannopoulos, C. A. & Tretyakov, S. A., 2014, In : New Journal of Physics. 16, 063004.

Research output: Contribution to journalArticle

permittivity
waveguides
mesh
strip
flexibility
8 Citations (Scopus)

Hiding a bump on a PEC plane by using an isotropic lossless dielectric layer

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Nov 1 2014, In : IEEE Transactions on Antennas and Propagation. 62, 11, p. 5706-5714 9 p., 6895287.

Research output: Contribution to journalArticle

conduction
Integral equations
Permittivity
slabs
plane waves
4 Citations (Scopus)

How nonreciprocal is an effective permittivity matrix?

Valagiannopoulos, C. A., 2014, In : Microwave and Optical Technology Letters. 56, 9, p. 2018-2021 4 p.

Research output: Contribution to journalArticle

Permittivity
gyrators
Gyrators
permittivity
Anisotropic media
16 Citations (Scopus)

Hyperbolic-metamaterial antennas for broadband enhancement of dipole emission to free space

Valagiannopoulos, C. A., Mirmoosa, M. S., Nefedov, I. S., Tretyakov, S. A. & Simovski, C. R., 2014, In : Journal of Applied Physics. 116, 16, 163106.

Research output: Contribution to journalArticle

antennas
dipoles
broadband
augmentation
radiation
4 Citations (Scopus)

Mimicking the perfect electromagnetic conducting scattering mechanisms with suitable bi-isotropic media

Valagiannopoulos, C. A. & Sihvola, A. H., Nov 17 2014, In : Electromagnetics. 34, 8, p. 593-607 15 p.

Research output: Contribution to journalArticle

isotropic media
Wire
Scattering
electromagnetism
conduction
9 Citations (Scopus)

On the minimal scattering response of PEC cylinders in a dielectric cloak

Valagiannopoulos, C. A., Alitalo, P. & Tretyakov, S. A., 2014, In : IEEE Antennas and Wireless Propagation Letters. 13, p. 403-406 4 p., 6746011.

Research output: Contribution to journalArticle

Electromagnetic waves
Electric lines
Scattering
10 Citations (Scopus)

Scattering and absorption of a complex source point beam by a grounded lossy dielectric slab with a superstrate

Tsitsas, N. L., Valagiannopoulos, C. A. & Nosich, A. I., Oct 1 2014, In : Journal of Optics (United Kingdom). 16, 10, 105712.

Research output: Contribution to journalArticle

point sources
Fourier transforms
slabs
Scattering
scattering
12 Citations (Scopus)

Symmetric absorbers realized as gratings of PEC cylinders covered by ordinary dielectrics

Valagiannopoulos, C. A. & Tretyakov, S. A., Oct 1 2014, In : IEEE Transactions on Antennas and Propagation. 62, 10, p. 5089-5098 10 p., 2340891.

Research output: Contribution to journalArticle

absorbers
gratings
Dipole moment
Circular cylinders
Electromagnetic waves
2013
3 Citations (Scopus)
coatings
Coatings
Permittivity
permittivity
profiles
4 Citations (Scopus)
Electric lines
Metamaterials
Costs
1 Citation (Scopus)

Design and free-space measurements of a simple electromagnetic cloak for conducting cylindrical objects

Alitalo, P., Valagiannopoulos, C. A. & Culhaoglu, A. E., 2013, In : AIP Advances. 3, 4, 042135.

Research output: Contribution to journalArticle

electromagnetism
conduction
unity
permittivity
microwaves
4 Citations (Scopus)

Electromagnetic absorption of gaussian beams by a grounded layered structure

Valagiannopoulos, C., Apr 1 2013, In : Radioengineering. 22, 1, p. 333-340 8 p.

Research output: Contribution to journalArticle

Electromagnetic wave absorption
Gaussian beams
Permittivity
6 Citations (Scopus)
permittivity
wedges
Permittivity
Electric fields
electric fields
7 Citations (Scopus)
Metamaterials
attenuation
electromagnetism
Anechoic chambers
anechoic chambers
1 Citation (Scopus)
Green's function
Waveguides
Green's functions
waveguides
parallel plates
5 Citations (Scopus)

Low-pass features of optical nano-filters constituted by simple layered structures

Valagiannopoulos, C. A. & Sihvola, A., Sep 2013, In : Microwave and Optical Technology Letters. 55, 9, p. 2099-2106 8 p.

Research output: Contribution to journalArticle

Nanophotonics
low pass filters
Low pass filters
Permittivity
permittivity
79 Citations (Scopus)

Perfect absorption in graphene multilayers

Valagiannopoulos, C. & Nefedov, I. S., 2013, In : Journal of Optics.

Research output: Contribution to journalArticle

8 Citations (Scopus)

The effective radiation pattern concept for realistic performance estimation of LTE wireless systems

Zarbouti, D., Tsoulos, G., Athanasiadou, G. & Valagiannopoulos, C., 2013, In : International Journal of Antennas and Propagation. 2013, 746831.

Research output: Contribution to journalArticle

Beamforming
Network performance