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
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

Revisiting beamforming under the prism of inverse methods

Valagiannopoulos, C. & Kovanis, V., Jan 1 2019, Physics and Simulation of Optoelectronic Devices XXVII. Osinski, M., Witzigmann, B. & Arakawa, Y. (eds.). SPIE, 109120Q. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10912).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inverse Method
Prism
beamforming
Beamforming
Prisms
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

Achieving Anomalous Refraction with Metasurfaces Composed by Two Ordinary Dielectric Materials

Tsitsas, N. L. & Valagiannopoulos, C., Nov 13 2018, 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018. Institute of Electrical and Electronics Engineers Inc., p. 395-397 3 p. 8534170

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Refraction
Integral equations
integral equations
refraction
rods

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

Lateral radiative forces exerted by evanescent fields along a hyperbolic metamaterial slab

Nefedov, I. S., Valagiannopoulos, C. A. & Shalin, A. S., Jan 1 2018, In : Journal of Physics: Conference Series. 1092, 012096.

Research output: Contribution to journalConference article

slabs
waveguides
momentum
nanoparticles
pushing

Nonlinear waves in hyperbolic metamaterials: Focus on solitons and rogues

Boardman, A. D., Grimalsky, V. V., Guo, T., Kibler, B., McNiff, J., Nefedov, I., Rapoport, Y., Argyropoulos, C. & Valagiannopoulos, C., Jan 1 2018, Metamaterials XI. SPIE, Vol. 10671. 106710L

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metamaterials
Nonlinear Waves
Solitons
nonlinear equations
solitary waves

On self-oscillating wireless power transfer

Tretyakov, S., Valagiannopoulos, C., Ra'Di, Y. & Simovski, C., Jan 2 2018, 2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2017. Institute of Electrical and Electronics Engineers Inc., Vol. 2017-November. p. 1-3 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microwaves
microwaves
receivers
electric generators
antennas
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
1 Citation (Scopus)

Optimized Operation of Photonic Devices with Use of Ordinary Bulk Materials

Valagiannopoulos, C., Nov 13 2018, 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, METAMATERIALS 2018. Institute of Electrical and Electronics Engineers Inc., p. 495-497 3 p. 8534066

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photonic devices
Refraction
photonics
Scattering
Fabrication
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
1 Citation (Scopus)

Mitigating Snell's-Law reflection and transmission with metasurfaces of ordinary dielectrics

Tsitsas, N. L. & Valagiannopoulos, C. A., Oct 11 2017, Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017. Institute of Electrical and Electronics Engineers Inc., p. 1160-1163 4 p. 8065474

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wave transmission
boundary value problems
Boundary value problems
Integral equations
integral equations
9 Citations (Scopus)

Waves in hyperbolic and double negative metamaterials including rogues and solitons

Boardman, A. D., Alberucci, A., Assanto, G., Grimalsky, V. V., Kibler, B., McNiff, J., Nefedov, I. S., Rapoport, Y. G. & Valagiannopoulos, C. A., Oct 9 2017, In : Nanotechnology. 28, 44, 444001.

Research output: Contribution to journalReview article

Metamaterials
Solitons
Raman scattering
Diffraction
Electromagnetic wave propagation
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

Analytical investigations of ground modifications assisting the detection of a buried object

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Sep 19 2016, 2016 URSI International Symposium on Electromagnetic Theory, EMTS 2016. Institute of Electrical and Electronics Engineers Inc., p. 783-786 4 p. 7571519

Research output: Chapter in Book/Report/Conference proceedingConference contribution

inclusions
radar antennas
Radar antennas
ground penetrating radar
Antenna grounds

Conjugately-matched uniaxial metamaterials make extremely efficient absorbers, emitters, and reflectors

Valagiannopoulos, C. A., Simovski, C. R. & Tretyakov, S. A., Nov 16 2016, 2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2016. Institute of Electrical and Electronics Engineers Inc., p. 379-381 3 p. 7746406

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photonic devices
Metamaterials
Electromagnetic waves
reflectors
absorbers

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
1 Citation (Scopus)

Guessing the texture of magnetic samples assisted by Aharonov-Bohm effect

Valagiannopoulos, C. A., Alù, A., Dimakis, A. & Marengo, E. A., May 31 2016, 2016 10th European Conference on Antennas and Propagation, EuCAP 2016. Institute of Electrical and Electronics Engineers Inc., 7481443

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Magnetic permeability
Wave functions
Electron beams
textures
Textures
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

Radiation-enhancing reflector

Valagiannopoulos, C. A. & Tretyakov, S. A., May 31 2016, 2016 10th European Conference on Antennas and Propagation, EuCAP 2016. Institute of Electrical and Electronics Engineers Inc., 7481933

Research output: Chapter in Book/Report/Conference proceedingConference contribution

reflectors
Radiation
radiation
Evanescent fields
Antenna reflectors
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

Aberration-free planar focusing based on parity-time symmetric nonlocal metamaterials

Monticone, F., Alu, A. & Valagiannopoulos, C. A., Oct 22 2015, IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). Institute of Electrical and Electronics Engineers Inc., Vol. 2015-October. p. 252-253 2 p. 7304512

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metamaterials
Aberrations
Lenses
Imaging techniques
Refraction
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

Amplifying the response of a buried object by depositing a passive layer on the ground

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Sep 2 2015, 2015 Computational Electromagnetics International Workshop, CEM 2015. Institute of Electrical and Electronics Engineers Inc., p. 28-29 2 p. 7237424

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inclusion
Detectability
Numerical Results
Configuration
Line

Blacker than ideally black: Double negative conjugately matched cylinders

Vehmas, J., Valagiannopoulos, C., Tretyakov, S. & Maslovski, S., Nov 30 2015, 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2015. Institute of Electrical and Electronics Engineers Inc., p. 511-513 3 p. 7342506

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metamaterials

Cloaking a bump inside a single isotropic lossless dielectric

Valagiannopoulos, C. A., Tsitsas, N. L. & Sihvola, A. H., Aug 27 2015, 2015 9th European Conference on Antennas and Propagation, EuCAP 2015. Institute of Electrical and Electronics Engineers Inc., 7228455

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Integral equations
Permittivity
conduction
wave reflection
far fields

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
2 Citations (Scopus)

Excitation of a grounded lossy dielectric slab by an external complex source point beam

Tsitsas, N. L. & Valagiannopoulos, C. A., Aug 27 2015, 2015 9th European Conference on Antennas and Propagation, EuCAP 2015. Institute of Electrical and Electronics Engineers Inc., 7228895

Research output: Chapter in Book/Report/Conference proceedingConference contribution

point sources
Boundary value problems
Fourier transforms
slabs
Scattering
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

PT-symmetric metamaterial systems for aberration-free imaging and wave manipulation

Monticone, F., Valagiannopoulos, C., Savoia, S., Fleury, R. & Alu, A., Nov 30 2015, 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2015. Institute of Electrical and Electronics Engineers Inc., p. 223-225 3 p. 7342581

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metamaterials
Aberrations
Lenses
Optical instruments
Imaging techniques
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