Juho Luomahaara

20102019
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Research Output 2010 2019

  • 12 Article
  • 3 Conference article in proceedings
  • 1 Dissertation
2019

Multiplexed readout of kinetic inductance bolometer arrays

Sipola, H., Luomahaara, J., Timofeev, A., Grönberg, L., Rautiainen, A., Luukanen, A. & Hassel, J., 2019, In : Review of Scientific Instruments. 90, 7, 074702.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Bolometers
bolometers
inductance
Inductance
readout
2018

Unshielded SQUID Sensors for Ultra-Low-Field Magnetic Resonance Imaging

Luomahaara, J., Kiviranta, M., Grönberg, L., Zevenhoven, K. & Laine, P., 8 Jan 2018, In : IEEE Transactions on Applied Superconductivity. 28, 4, 1600204.

Research output: Contribution to journalArticleScientificpeer-review

SQUIDs
magnetic resonance
sensors
Sensors
Magnetic resonance
2017
12 Citations (Scopus)

Optical and electrical characterization of a large kinetic inductance bolometer focal plane array

Timofeev, A., Luomahaara, J., Grönberg, L., Mäyrä, A., Sipola, H., Aikio, M., Metso, M., Vesterinen, V., Tappura, K., Ala-Laurinaho, J., Luukanen, A. & Hassel, J., 1 Mar 2017, In : IEEE Transactions on Terahertz Science and Technology. 7, 2, p. 218 - 224 7 p., 7811297.

Research output: Contribution to journalArticleScientificpeer-review

Bolometers
Focal plane arrays
bolometers
focal plane devices
inductance
2 Citations (Scopus)

Side-wall spacer passivated sub-μm Josephson junction fabrication process

Grönberg, L., Kiviranta, M., Vesterinen, V., Lehtinen, J., Simbierowicz, S., Luomahaara, J., Prunnila, M. & Hassel, J., 16 Nov 2017, In : Superconductor Science and Technology. 30, 12, 6 p., 125016.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Josephson junctions
spacers
Lithography
Niobium
Parametric amplifiers
2016
2 Citations (Scopus)

Characterization sub-range-bin spatial features with frequency modulated continuous wave radar operated at 650 GHz

Luomahaara, J., Säily, J., Pursula, P., Luukanen, A. & Hassel, J., 30 Jun 2016, 2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre-Wave Technology and Applications. Institute of Electrical and Electronic Engineers IEEE, p. 1-3

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

continuous wave radar
plastics
reflectance
profiles
6 Citations (Scopus)

Influence of Substrate on Plasmon-Induced Absorption Enhancements

Tappura, K., Luomahaara, J., Haatainen, T., Hassel, J. & Vehmas, T., 2016, In : Plasmonics. 11, 2, p. 627-635

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Silicon
Thin films
Silicon solar cells
Substrates
Amorphous silicon
2014

Advances in superconducting sensors for medical imaging and metrology: Dissertation

Luomahaara, J., 2014, Espoo: Aalto University. 121 p.

Research output: ThesisDissertationCollection of Articles

metrology
magnetic resonance
sensors
triangles
interference
17 Citations (Scopus)

Kinetic inductance magnetometer

Luomahaara, J., Vesterinen, V., Grönberg, L. & Hassel, J., 2014, In : Nature Communications. 5, 4872.

Research output: Contribution to journalArticleScientificpeer-review

Magnetometers
Magnetic Fields
inductance
Inductance
magnetometers
2013
2 Citations (Scopus)

Characterization of SQUID-based null detector for a quantum metrology triangle experiment

Luomahaara, J., Kemppinen, A., Helistö, P. & Hassel, J., 2013, In : IEEE Transactions on Applied Superconductivity. 23, 3, 5 p., 1601705.

Research output: Contribution to journalArticleScientificpeer-review

SQUIDs
triangles
metrology
Detectors
detectors
77 Citations (Scopus)

Hybrid ultra-low-field MRI and magnetoencephalography system based on a commercial whole-head neuromagnetometer

Vesanen, P. T., Nieminen, J. O., Zevenhoven, K. C. J., Dabek, J., Parkkonen, L. T., Zhdanov, A. V., Luomahaara, J., Hassel, J., Penttilä, J., Simola, J., Ahonen, A. I., Mäkelä, J. P. & Ilmoniemi, R. J., 2013, In : Magnetic Resonance in Medicine. 69, 6, p. 1795-1804 10 p.

Research output: Contribution to journalArticleScientificpeer-review

Open Access
Magnetoencephalography
Head
Equipment and Supplies
Magnetic Fields
2012
7 Citations (Scopus)

A large winding-ratio planar transformer with an optimized geometry for SQUID ammeter

Luomahaara, J., Kiviranta, M. & Hassel, J., 2012, In : Superconductor Science and Technology. 25, 3, 4 p., 035006.

Research output: Contribution to journalArticleScientificpeer-review

ammeters
Ammeters
SQUIDs
transformers
interference
2011
20 Citations (Scopus)

All-planar SQUIDs and pickup coils for combined MEG and MRI

Luomahaara, J., Vesanen, P. T., Penttilä, J., Nieminen, J. O., Dabek, J., Simola, J., Kiviranta, M., Grönberg, L., Zevenhoven, C. J., Ilmoniemi, R. J. & Hassel, J., 2011, In : Superconductor Science and Technology. 24, 7, 7 p., 075020.

Research output: Contribution to journalArticleScientificpeer-review

Magnetoencephalography
Pickups
SQUIDs
Magnetic resonance
magnetic resonance
30 Citations (Scopus)

Avoiding eddy-current problems in ultra-low-field MRI with self-shielded polarizing coils

Nieminen, J. O., Vesanen, P. T., Zevenhoven, K. C. J., Dabek, J., Hassel, J., Luomahaara, J., Penttilä, J. S. & Ilmoniemi, R. J., 2011, In : Journal of Magnetic Resonance. 212, 1, p. 154-160 7 p.

Research output: Contribution to journalArticleScientificpeer-review

eddy currents
coils
rooms
magnetic resonance
acquisition

Radio-frequency transport of single electrons in superconductor-normal-metal tunnel junctions and the quantum metrological triangle

Kemppinen, A., Maisi, V. F., Saira, O-P., Kafanov, S., Lotkhov, S. V., Pashkin, Y. A., Aref, T., Meschke, M., Möttönen, M., Hahtela, O., Hassel, J., Luomahaara, J., Mykkänen, E., Koivula, H., Averin, D. V., Seppä, H., Tsai, J. S., Zorin, A. B., Manninen, A. & Pekola, J. P., 2011, Proceedings: XXXth URSI General Assembly and Scientific Symposium, URSIGASS 2011. Institute of Electrical and Electronic Engineers IEEE, 6050291

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

tunnel junctions
triangles
radio frequencies
insulators
metals

Ultra-low-field MRI system for hybrid MEG-MRI

Vesanen, P. T., Hassel, J., Penttilä, J. S., Nieminen, J. O., Dabek, J., Zevenhoven, K., Luomahaara, J., Alanko, S., Catallo, N., Lin, F-H., Simola, J., Ahonen, A. & Ilmoniemi, R., 2011, Proceedings International Society for Magnetic Resonance in Medicine Vol. 19.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

2010
56 Citations (Scopus)

Electrical transport and field-effect transistors using inkjet-printed SWCNT films having different functional side groups

Gracia-Espino, E., Sala, G., Pino, F., Halonen, N., Luomahaara, J., Mäklin, J., Tóth, G., Kordás, K., Jantunen, H., Terrones, M., Helistö, P., Seppä, H., Ajayan, P. M. & Vajtai, R., 2010, In : ACS Nano. 4, 6, p. 3318-3324 7 p.

Research output: Contribution to journalArticleScientificpeer-review

Field effect transistors
Nanotubes
Polyethylene glycols
Carbon Nanotubes
glycols