55 citations · 577 across the 50 of their papers we have counts for
50 papers
Coherent control of thermal transport with pillar-based phononic crystals
Tatu A. S. Korkiamäki, Tuomas A. Puurtinen, Mikko Kivekäs +4
Two-dimensional phononic crystals (PnCs) formed by a periodic array of holes in a suspended membrane have previously been used to coherently control thermal conductance at low temp…
Improvement of the Simmons model for tunnel junctions
Ilmo Räisänen, Ilari Maasilta
The Simmons model is a well-known and widely used model for the elastic tunneling current of a metallic tunnel junction, and fitting it to electrical measurements can be used to es…
Phonon-blocked junction calorimeter
Zhuoran Geng, Joel Hätinen, Emma Mykkänen +2
This study introduces the theory of a microcalorimeter based on phonon-blocked superconducting tunnel junctions, integrating on-chip electron cooling and boundary resistance phonon…
Controlling the electron-phonon heat exchange in a metallic film by its position in a dielectric slab
D. V. Anghel, M. Dolineanu, J. Bergli +1
We theoretically study the heat flux between electrons and phonons in a thin metallic film embedded in a suspended dielectric slab (called a \textit{membrane}, in accordance with t…
Heat transfer across a vacuum gap induced by piezoelectrically mediated acoustic phonon tunneling
Zhuoran Geng, Ilari J. Maasilta
In contradictin to the common concept that acoustic phonons can only travel inside a material medium, they can in fact "tunnel" across a vacuum gap with the help of piezoelectricit…
Highly tunable NbTiN Josephson junctions fabricated with focused helium ion beam
Aki Ruhtinas, Ilari J. Maasilta
We demonstrate a direct writing method for the fabrication of planar Josephson junctions from high quality superconducting niobium titanium nitride (NbTiN) thin films, by creating…