6.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Aalto UniversityFI160 papers
- University of HelsinkiFI89 papers
- Centre National de la Recherche ScientifiqueFR69 papers
- National Institute for AstrophysicsIT65 papers
- Helsinki Institute of PhysicsFI63 papers
- University of ManchesterGB63 papers
- University of MilanIT63 papers
- University of California, Santa BarbaraUS61 papers
- University of TriesteIT58 papers
- Universidad de CantabriaES57 papers
- University of OsloNO57 papers
- University of Rome Tor VergataIT57 papers
21 papers · 1 filter
Piezoresistive PtSe pressure sensors with reliable high sensitivity and their integration into CMOS ASIC substrates
Sebastian Lukas, Nico Rademacher, Sofía Cruces +14
Membrane-based sensors are an important market for microelectromechanical systems (MEMS). Two-dimensional (2D) materials, with their low mass, are excellent candidates for suspende…
Wafer-scale CMOS-compatible graphene Josephson field-effect transistors
Andrey A. Generalov, Klaara L. Viisanen, Jorden Senior +5
Electrostatically tunable Josephson field-effect transistors (JoFETs) are one of the most desired building blocks of quantum electronics. JoFET applications range from parametric a…
Compact inductor-capacitor resonators at sub-gigahertz frequencies
Qi-Ming Chen, Priyank Singh, Rostislav Duda +8
Compact inductor-capacitor (LC) resonators, in contrast to coplanar waveguide (CPW) resonators, have a simple lumped-element circuit representation but usually call for sophisticat…
Thermal resistance in superconducting flip-chip assemblies
Joel Hätinen, Emma Mykkänen, Klaara Viisanen +5
Cryogenic microsystems that utilize different 3D integration techniques are being actively developed, e.g., for the needs of quantum technologies. 3D integration can introduce oppo…
Coulomb Blockade Thermometry on a Wide Temperature Range
O. M. Hahtela, A. Kemppinen, J. Lehtinen +11
The Coulomb Blockade Thermometer (CBT) is a primary thermometer for cryogenic temperatures, with demonstrated operation from below 1 mK up to 60 K. Its performance as a primary the…
Driving a low critical current Josephson junction array with a mode-locked laser
J. Nissila, T. Fordell, K. Kohopaa +11
We demonstrate the operation of Josephson junction arrays (JJA) driven by optical pulses generated by a mode-locked laser and an optical time-division multiplexer. A commercial pho…
MEMS Heat Flux Sensor
Antti Immonen, Saku Levikari, Feng Gao +2
Heat flux sensors have potential in enabling applications that require tracking of direct and instantaneous thermal energy transfer. To facilitate their use, the sensors have to be…
Broadband Tunable Phase Shifter For Microwaves
Jinli Zhang, Tianyi Li, Roope Kokkoniemi +8
We implement a broadly tunable phase shifter for microwaves based on superconducting quantum interference devices (SQUIDs) and study it both experimentally and theoretically. At di…
High frequency mechanical excitation of a silicon nanostring with piezoelectric aluminum nitride layers
A. Pitanti, T. Makkonen, M. F. Colombano +8
A strong trend for quantum based technologies and applications follows the avenue of combining different platforms to exploit their complementary technological and functional advan…
Effects of device geometry and material properties on dielectric losses in superconducting coplanar-waveguide resonators
Valtteri Lahtinen, Mikko Möttönen
Superconducting coplanar-waveguide (CPW) resonators are one of the key devices in circuit quantum electrodynamics (cQED). Their performance can be limited by dielectric losses in t…
Nano-thermoelectric infrared bolometers
Aapo Varpula, Kirsi Tappura, Jonna Tiira +5
Infrared (IR) radiation detectors are used in numerous applications from thermal imaging to spectroscopic gas sensing. Obtaining high speed and sensitivity, low-power operation and…
Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide
Kirsi Tappura, Taneli Juntunen, Kaarle Jaakkola +4
A large-area thermoelectric generator (TEG) utilizing a folded thin-film concept is implemented and the performance evaluated for near room temperature applications having modest t…
Screen-printed and spray coated graphene-based RFID transponders
K. Jaakkola, V. Ermolov, P. G. Karagiannidis +7
We report Ultra-High-Frequency (UHF, 800MHz-1GHz) Radio Frequency Identification (RFID) transponders consisting of printed dipole antennas combined with RFID microchips. These are…
Near-Field UHF RFID Transponder with a Screen-Printed Graphene Antenna
Kaarle Jaakkola, Henrik Sandberg, Markku Lahti +1
As a method of producing RFID tags, printed graphene provides a low-cost and eco-friendly alternative to the etching of aluminum or copper. The high resistivity of graphene, howeve…
Exploitation of Transparent Conductive Oxides in the Implementation of a Window-Integrated Wireless Sensor Node
Kaarle Jaakkola, Kirsi Tappura
Exploitation of transparent conductive oxides (TCO) to implement an energy-autonomous sensor node for a wireless sensor network (WSN) is studied and a practical solution presented.…
Helium load on W-O coatings grown by pulsed laser deposition
R. Mateus, D. Dellasega, M. Passoni +4
W-O deposits with complex morphologies and significant He contents will growth on the surface of plasma facing components exposed to He discharges. To mimic the re/co-deposition pr…
Multiplexed readout of kinetic inductance bolometer arrays
Hannu Sipola, Juho Luomahaara, Andrey Timofeev +4
Kinetic inductance bolometer (KIB) technology is a candidate for passive sub-millimeter wave and terahertz imaging systems. Its benefits include scalability into large 2D arrays an…
A numerical study on the design trade-offs of a thin-film thermoelectric generator for large-area applications
Kirsi Tappura
Thin-film thermoelectric generators with a novel folding scheme are proposed for large-area, low energy-density applications. Both the electrical current and heat transfer are in t…
The spin resonance clock transition of the endohedral fullerene
R. T. Harding, S. Zhou, J. Zhou +6
The endohedral fullerene has narrow electron paramagnetic resonance lines which have been proposed as the basis for a condensed-matter portable atomic cloc…
Graphene-Flakes Printed Wideband Elliptical Dipole Antenna for Low Cost Wireless Communications Applications
Antti Lamminen, Kirill Arapov, Gijsbertus de With +4
This letter presents the design, manufacturing and operational performance of a graphene-flakes based screenprinted wideband elliptical dipole antenna operating from 2 GHz up to 5…
Scaling of graphene field-effect transistors supported on hexagonal boron nitride: radio-frequency stability as a limiting factor
Pedro C. Feijoo, Francisco Pasadas, José M. Iglesias +7
The quality of graphene in nanodevices has increased hugely thanks to the use of hexagonal boron nitride as a supporting layer. This paper studies to which extent hBN together with…