Henrik Wallén
WallénAalto University

Henrik Wallén

University Teacher, Department of Electronics and Nanoengineering

Contact information

Work street address
Maarintie 8
02150
Espoo
Work postal address
PL 15500
00076
Aalto
Room number
TUAS 2139
Work email
henrik.wallen at aalto.fi
Work mobile phone
+358 50 4205 860

Publications

Peer-reviewed scientific articles

Journal article-refereed, Original research

Polarizability of radially anisotropic elliptic inclusion

Rimpiläinen, Tommi; Wallen, H.; Sihvola, A. 

2016 

JOURNAL OF APPLIED PHYSICS 

ISSN: 0021-8979 

Tailoring effective media by Mie resonances of radially-anisotropic cylinders

Kettunen, Henrik; Wallén, Henrik; SIhvola, Ari 

2015 

Photonics 

Radial Anisotropy in Spheroidal Scatterers

Rimpiläinen, Tommi; Wallén, Henrik; Sihvola, Ari 

2015 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

Anomalous absorption, plasmonic resonances, and invisibility of radially anisotropic spheres

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2015 

RADIO SCIENCE 

ISSN: 0048-6604 

Uniform Surface Integral Equation Formulation for Mixed Impedance Boundary Conditions

Ylä-Oijala, Pasi; Kiminki, Sami P.; Wallén, Henrik; Sihvola, Ari 

2015 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

General systropy in spherical scatterers

Rimpiläinen, Tommi; Pitkonen, Mikko; Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2014 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

Cloaking and magnifying using radial anisotropy

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2013 

JOURNAL OF APPLIED PHYSICS 

ISSN: 0021-8979 

Finnish URSI Radio Science Days

Sihvola, Ari; Wallén, Henrik 

2013 

THE RADIO SCIENCE BULLETIN 

ISSN: 1024-4530 

Electrical response of systropic sphere

Rimpiläinen, Tommi; Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2012 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

Homogenization of thin dielectric composite slabs: techniques and limitations

Kettunen, Henrik; Qi, Jiaran; Wallén, Henrik; Sihvola, Ari 

2011 

APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL 

ISSN: 1054-4887 

Different homogenization methods based on scattering parameters of dielectric-composite slabs

Qi, Jiaran; Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2011 

RADIO SCIENCE 

ISSN: 0048-6604 

Mixed-Impedance Boundary Conditions

Wallén, Henrik; Lindell, Ismo V; Sihvola, Ari 

2011 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

Electrical engineers' perceptions on education - electromagnetic field theory and its connection to working life

Keltikangas, Kirsti; Wallén, Henrik 

2010 

EUROPEAN JOURNAL OF ENGINEERING EDUCATION 

ISSN: 0304-3797 

Quasi-dynamic homogenization of geometrically simple dielectric composites

Qi, Jiaran; Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2010 

APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL 

ISSN: 1054-4887 

Compensation of Fabry-Pérot resonances in homogenization of dielectric composites

Qi, Jiaran; Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2010 

IEEE Antennas and Wireless Propagation Letters 

ISSN: 1536-1225 

Material realizations of perfect electric conductor objects

Sihvola, Ari; Lindell, Ismo V.; Wallén, Henrik; Ylä-Oijala, Pasi 

2010 

APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL 

ISSN: 1054-4887 

Electrostatic response of a half-disk

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2009 

JOURNAL OF ELECTROSTATICS 

General Electromagnetic Boundary Conditions Involving Normal Field Components

Lindell, Ismo; Wallén, Henrik; Sihvola, Ari 

2009 

IEEE Antennas and Wireless Propagation Letters 

ISSN: 1536-1225 

Zero Backscattering From Self-Dual Objects of Finite Size

Lindell, Ismo; Sihvola, Ari; Ylä-Oijala, Pasi; Wallén, Henrik 

2009 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

ISSN: 0018-926X 

Scattering by DB Spheres

Sihvola, Ari; Wallén, Henrik; Ylä-Oijala, Pasi; Taskinen, Matti; Kettunen, Henrik; Lindell, Ismo 

2009 

IEEE Antennas and Wireless Propagation Letters 

ISSN: 1536-1225 

Composite near-field superlens design using mixing formulas and simulations

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2009 

METAMATERIALS 

ISSN: 1873-1988 

Electrostatic resonances of a negative-permittivity hemisphere

Kettunen, H.; Wallén, H.; Sihvola, A. 

2008 

JOURNAL OF APPLIED PHYSICS 

Surface modes of negative-parameter interfaces and the importance of rounding sharp corners

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2008 

METAMATERIALS 

ISSN: 1873-1988 

Polarizability of a dielectric hemisphere

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2007 

JOURNAL OF APPLIED PHYSICS 

Broadband Muller-MLFMA for electromagnetic scattering by dielectric objects

Wallén, Henrik; Järvenpää, Seppo; Ylä-Oijala, Pasi; Sarvas, Jukka 

2007 

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 

Application of Kelvin inversion to static conducting wedge problems

Nikoskinen, Keijo; Wallén, Henrik 

2006 

IEE Proceedings Science, Measurement & Technology 

Broadband multilevel fast multipole algorithm for acoustic scattering problems

Wallén, Henrik; Järvenpää, Seppo; Ylä-Oijala, Pasi 

2006 

JOURNAL OF COMPUTATIONAL ACOUSTICS 

Generalized Q-media and field decomposition in differential-form approach

Lindell, Ismo; Wallén, Henrik 

2004 

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS 

Differential-form electromagnetics and bi-anisotropic Q-media

Lindell, Ismo; Wallen, Henrik 

2004 

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS 

Polarizability of conducting sphere-doublets using series of images.

Wallen, Henrik; Sihvola, Ari 

2004 

JOURNAL OF APPLIED PHYSICS 

Book section, Chapters in research books

Homogenization of amorphous media

Sihvola, Ari; Wallén, Henrik 

2013 

SPRINGER GABLER 

ISBN: 978-3-642-32474-1 

Mixing Formulas and Plasmonic Composites

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2009 

SPRINGER 

ISBN: 978-1-4020-9406-4 

Translation procedures for broadband MLFMA

Wallén, Henrik; Sarvas, Jukka 

2005 

Conference proceedings

Embedding interaction in traditional mass teaching

Lehtovuori, Anu; Wallén, Henrik; Honkala, Mikko; Hänninen, Jari 

2016 

SEFI 

ISBN: 9782873520144 

Porcupic concentrators and bulbic cloaks in planar configuration

Rimpiläinen, Tommi; Wallen, Henrik; Sihvola, Ari 

2016 

URSI International Symposium on Electromagnetic Theory 

Institute of Electrical and Electronics Engineers Inc. 

ISBN: 9781509025022 

ISSN: 2163-405X 

Anisotropy makes the difference: Systropic, bulbic, and porcupic metamaterials

Sihvola, Ari; Rimpiläinen, Tommi; Wallén, Henrik 

2016 

International Conference on Metamaterials, Photonic Crystals and Plasmonics 

META Publishing 

ISSN: 2429-1390 

Composites with radially anisotropic cylinders

Wallen, Henrik; Sihvola, Ari 

2016 

Institute of Electrical and Electronics Engineers Inc. 

ISBN: 9781467388016 

Improvements to the numerical computation of the evanescent part in broadband MLFMA

Järvenpää, Seppo; Wallen, Henrik 

2015 

IEEE 

ISBN: 978-1-4799-7817-5 

Mie resonances of radially anisotropic dielectric cylinders

Kettunen, Henrik; Wallen, Henrik; Sihvola, Ari 

2015 

IEEE 

ISBN: 9789090086286 

Electrostatic properties of porcupic and bulbic spheroids

Rimpiläinen, Tommi; Wallen, Henrik; Sihvola, Ari 

2015 

IEEE 

ISBN: 9789090086286 

Towards hyperbolic radial anisotropy using layered spheres

Wallen, Henrik; Kettunen, Henrik; Sihvola, Ari 

2015 

IEEE 

ISBN: 9789090086286 

Surface plasmon resonances on cones and wedges

Kettunen, Henrik; Chesnel, Lucas; Hakula, Harri; Wallén, Henrik; Sihvola, Ari 

2014 

ISBN: 978-1-4799-3452-2 

Magnetic response from electrically invisible anisotropic dielectric cylinders

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2014 

Electrical response of radially anisotropic spheroidal scatterers

Rimpiläinen, Tommi; Wallén, Henrik; Sihvola, Ari 

2014 

Anisotropy and non-reciprocity in boundary conditions: Generalized PEMC surface

Sihvola, Ari; Wallén, Henrik; Ylä-Oijala, Pasi; Kiminki, Sami 

2014 

Progress in Electromagnetics Research Symposium 

ISBN: 978-1-934142-28-8 

ISSN: 1559-9450 

Anomalous absorption using hyperbolic radial anisotropy

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2014 

Computer Aided Assessment of Electromagnetics using STACK

Wallén, Henrik 

2014 

ISBN: 978-2-9545460-2-5 

Invisibility through radial anisotropy

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2013 

Loss enhancement and cloaking properties of cylinders with polar anisotropy

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2013 

Extreme parameters in systropic spherical scatterers

Rimpiläinen, Tommi; Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2013 

Dispersion engineering through mixing formulas

Sihvola, Ari; Wallén, Henrik 

2013 

Dispersion manipulation of isotropic media through indefinite route

Sihvola, Ari; Wallén, Henrik; Kettunen, Henrik 

2013 

Mixtures and composite particles: correspondence of effective description

Sihvola, Ari; Kettunen, Henrik; Wallén, Henrik 

2013 

Singularities or Emergent Losses in Radially Uniaxial Spheres

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2013 

ISBN: 978-4-88552-276-5 

Losses from lossless building blocks?

Sihvola, Ari; Wallén, Henrik; Kettunen, Henrik 

2012 

ISBN: 978-952-67611-2-1 

Retrieving Effective Material Parameters with Reasonable Dispersion for Metamaterial Slabs

Wallén, Henrik 

2012 

ISBN: 978-1-4673-0460-3 

ISSN: 1522-3965 

Anisotropy in Seemingly Isotropic Media

Kettunen, Henrik; Qi, Jiaran; Wallén, Henrik; Sihvola, Ari 

2011 

Material realizations of extreme electromagnetic boundary conditions and metasurfaces

Sihvola, Ari; Wallén, Henrik; Ylä-Oijala, Pasi; Markkanen, Johannes; Lindell, Ismo V. 

2011 

Anti-Resonant Response of Resonant Inclusions?

Wallén, Henrik; Kettunen, Henrik; Qi, Jiaran; Sihvola, Ari 

2011 

Some Computational Aspects of Too Sharp Edges

Wallén, Henrik; Kataja, Juhani 

2011 

ISBN: 978-1-4577-1685-0 

Homogenization of dielectric composites with finite thickness

Kettunen, Henrik; Qi, Jiaran; Wallén, Henrik; Sihvola, Ari 

2010 

A Glance at Simple Electromagnetic Homogenization Procedures

Kettunen, Henrik; Qi, Jiaran; Wallén, Henrik; Sihvola, Ari 

2010 

Limitations in Homogenization of Thin (Meta)material Slabs

Kettunen, Henrik; Qi, Jiaran; Wallén, Henrik; Sihvola, Ari 

2010 

Mixed-impedance boundary conditions

Lindell, Ismo V.; Sihvola, Ari; Wallén, Henrik 

2010 

Frequency Dependence of Effective Permittivity of Simple Dielectric Composites

Qi, Jiaran; Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2010 

Different retrieval methods based on S-parameters for the permittivity of composites

Qi, Jiaran; Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2010 

Approximating ideal boundary conditions in electromagnetics with penetrable interfaces

Sihvola, Ari; Wallén, Henrik; Ylä-Oijala, Pasi; Lindell, Ismo V. 

2010 

A Geometrically Simple Benchmark Problem for Negative Index Metamaterial Homogenization

Wallén, Henrik; Kettunen, Henrik; Qi, Jiaran; Sihvola, Ari 

2010 

ISBN: 978-1-4244-5154-8 

A Simple Model Problem for Benchmarking Metamaterial Homogenization Theories

Wallén, Henrik 

2010 

Some Interesting Effects when Modeling Plasmonic Composites

Wallén, Henrik; Kettunen, Henrik; Qi, Jiaran; Sihvola, Ari 

2010 

OULUN YLIOPISTO 

ISBN: 978-951-42-6284-5 

Mie scattering and (ab)normal boundary conditions

Wallén, Henrik; Lindell, Ismo V.; Sihvola, Ari 

2010 

Surface plasmon resonances of a half-disk

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2009 

Extreme-parameter materials and boundary conditions

Sihvola, Ari; Wallén, Henrik; Lindell, Ismo 

2009 

Beware of sharp corners when modeling metamaterials

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2009 

Homogenization of Resonant Particles - How Small is Small Enough?

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2009 

European Physical Society 

ISBN: 2-914771-57-6 

Applicability of classical mixing rules: from positive to negative parameters

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2009 

Metamorphose-VI 

ISBN: 978-0-9551179-6-1 

Cloaking effect of an almost perfect lens

Kettunen, Henrik; Karilainen, Antti; Tretyakov, Sergei; Wallén, Henrik; Sihvola, Ari 

2008 

Mixing formula predictions for a composite near-field superlens

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2008 

ISBN: 978-84-9769-229-8 

Mixing formulas and plasmonic composites

Wallén, H.; Kettunen, H.; Sihvola, A. 

2008 

Realization of an electromagnetic invisibility cloak by transmission-line networks

Alitalo, Pekka; Jylhä, Liisi; Karttunen, Aki; Luukkonen, Olli; Molera, G.; Rimminen, H.; Vaaja, Matti; Venermo, J.; Podlozny, Vladimir; Tretyakov, Sergei; Wallen, H. 

2007 

Electromagnetic Cloaking with a Mixture of Spiral Inclusions

Asghar, Muhammad; Hakala, Ilkka; Jantunen, Joni; Kettunen, Henrik; Qi, Jiaran; Varpula, Aapo; Guven, K.; Semchenko, I.V; Khakhomov, S.A; Gonzalo, R.; Özbay, E.; Podlozny, Vladimir; Sihvola, Ari; Tretyakov, Sergei; Wallen, Henrik 

2007 

Electric response of a small negative-permittivity hemisphere

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2007 

Electrostatic resonances on negative-permittivity interfaces, spheres and wedges

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2007 

Improved interpolation of evanescent waves for fast multipole methods

Wallén, Henrik 

2007 

Efficient representation of radiation and incoming wave patterns in 3D MLFMA in terms of two scalar fields

Sarvas, Jukka; Wallén, Henrik 

2006 

Shape effects on electrostatic resonances

Sihvola, Ari; Kettunen, Henrik; Wallén, Henrik 

2006 

Broadband MLFMA for electromagentic scattering by dielectric objects

Wallén, Henrik; Järvenpää, Seppo; Ylä-Oijala, Pasi 

2006 

How well can a PEC-backed gyrotropic layer approximate the ideal PEMC boundary?

Wallén, Henrik; Sihvola, Ari 

2006 

Broad-band MLFMA and plane-wave expansions of the Green's function

Wallén, Henrik; Sarvas, Jukka 

2005 

On the Efficient Implementation of Broad-Band MLFMA

Wallén, Henrik; Sarvas, Jukka 

2005 

Polarizability of conducting sphere-doublets using series of images

Wallén, Henrik; Sihvola, A. 

2003 

Non-refereed scientific articles

Unrefereed conference proceedings

The concept of systropy in electromagnetics

Rimpiläinen, Tommi; Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2013 

Singular fields, enhanced losses, and invisibility with radially uniaxial scatterers

Wallén, Henrik; Kettunen, Henrik; Sihvola, Ari 

2013 

Numerical methods for scattering problems expressed in terms of normal field components and their normal derivatives

Ylä-Oijala, Pasi; Kiminki, Sami P; Markkanen, Johannes; Wallén, Henrik; Sihvola, Ari; Lindell, Ismo; Järvenpää, Seppo 

2010 

Publications intended for professional communities

Published development or research report

XXXIII Finnish URSI Convention on Radio Science and SMARAD Seminar, Proceedings

Wallén, Henrik; Sihvola, Ari 

2013 

Polarizability of a Dielectric Hemisphere

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2007 

Application of Kelvin’s inversion to static conducting wedge problems

Nikoskinen, Keijo; Wallén, Henrik 

2006 

Nopea multipolimenetelmä ja matalan taajuuden ongelmat

Wallén, Henrik 

2006 

Images and plane-waves: Efficient field computation in electromagnetics and acoustics

Wallén, Henrik 

2006 

Broadband Müller-MLFMA for electromagnetic scattering by dielectric objects

Wallén, Henrik; Järvenpää, Seppo; Ylä-Oijala, Pasi; Sarvas, Jukka 

2006 

Translation procedures for broadband MLFMA

Wallén, Henrik; Sarvas, Jukka 

2005 

Broadband Multilevel Fast Multipole Algorithm for acoustic scattering problems

Wallén, Henrik; Järvenpää, Seppo; Ylä-Oijala, Pasi 

2005 

Polarizability of Conducting Sphere-Doublets using Series of Images

Wallén, Henrik; Sihvola, A. 

2004 

Electrostatic image theory for two intersecting conducting spheres

Lindell, Ismo; Wallén, H.; Sihvola, A. 

2003 

Differential-form electromagnetics and bi-anisotropic Q-media, November 2003.

Lindell, Ismo; Wallén, H. 

2003 

Generalized Q-media and field decomposition in differential-form approach

Lindell, Ismo; Wallén, H. 

2003 

Wave equations for bi-anisotropic media in differential forms

Lindell, Ismo; Wallén, H. 

2002 

Scattering anomalies of radially anisotropic sphers

Sihvola, Ari; Wallén, Henrik; Kettunen, Henrik 

2016 

Electrodynamics of Cylinders with Radial Anisotropy

Kettunen, Henrik; Wallén, Henrik; Sihvola, Ari 

2015 

Spheres and circles with radial anisotropy: Unexpected scattering properties

Sihvola, Ari; Kettunen, Henrik; Wallén, Henrik 

2015 

Surface integral equations for mixed impedance boundary conditions

Ylä-Oijala, Pasi; Kiminki, Sami P; Wallén, Henrik; Sihvola, Ari 

2015 

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