3 citations · 4 across the 4 of their papers we have counts for
4 papers
Inverse Problems for Screens
Emilia Blåsten, Petri Ola, Lassi Päivärinta
We study the inverse scattering from a screen with using only one incoming time--harmonic plane wave but with measurements of the scattered wave done at all directions. Especially…
Unique Determination of a Planar Screen in Electromagentic Inverse Scattering
Sadia Sadique, Petri Ola, Lassi Päivärint
We show that the far--field pattern of a scattered electromagnetic field corresponding to a single incoming plane--wave uniquely determines a bounded supraconductive planar screen.…
On Absence and Existence of the Anomalous Localized Resonance without the Quasi-static Approximation
Henrik Kettunen, Matti Lassas, Petri Ola
The paper considers the transmission problems for Helmholtz equation with bodies that have negative material parameters. Such material parameters are used to model metals on optica…
Transmission eigenvalues for elliptic operators
Michael Hitrik, Katsiaryna Krupchyk, Petri Ola +1
A reduction of the transmission eigenvalue problem for multiplicative sign-definite perturbations of elliptic operators with constant coefficients to an eigenvalue problem for a no…