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Research Output 1986 2016

  • 555 Citations
  • 12 h-Index
  • 42 Article
  • 3 Conference contribution
  • 2 Conference article
  • 1 Paper
2016
1 Citation (Scopus)

Andreev reflection and bound state formation in a ballistic two-dimensional electron gas probed by a quantum point contact

Irie, H., Todt, C., Kumada, N., Harada, Y., Sugiyama, H., Akazaki, T. & Muraki, K., Oct 12 2016, In : Physical Review B. 94, 15, 155305.

Research output: Contribution to journalArticle

Two dimensional electron gas
Point contacts
Ballistics
ballistics
electron gas
1 Citation (Scopus)

Detection of Coherent Terahertz Radiation from a High-Temperature Superconductor Josephson Junction by a Semiconductor Quantum-Dot Detector

Shaikhaidarov, R., Antonov, V. N., Casey, A., Kalaboukhov, A., Kubatkin, S., Harada, Y., Onomitsu, K., Tzalenchuk, A. & Sobolev, A., Feb 22 2016, In : Physical Review Applied. 5, 2, 024010.

Research output: Contribution to journalArticle

coherent radiation
high temperature superconductors
Josephson junctions
emitters
quantum dots

Graphene optical modulator on silicon waveguide controlled by fine metal-Top gate

Hori, D. Y., Kou, R., Tsuchizawa, T., Kobayashi, Y., Harada, Y., Hibino, H., Yamamoto, T., Yamada, K. & Nakajima, H., Nov 8 2016, 2016 IEEE 13th International Conference on Group IV Photonics, GFP 2016. IEEE Computer Society, p. 90-91 2 p. 7739064. (IEEE International Conference on Group IV Photonics GFP; vol. 2016-November).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Graphite
Light modulators
Silicon
Fermi level
Photonics
5 Citations (Scopus)

Nanowire-nanoantenna coupled system fabricated by nanomanipulation

Ono, M., Kuramochi, E., Zhang, G., Sumikura, H., Harada, Y., Cox, D. & Notomi, M., Apr 18 2016, In : Optics Express. 24, 8, p. 8647-8659 13 p.

Research output: Contribution to journalArticle

nanowires
augmentation
degrees of freedom
breakdown
ion beams
5 Citations (Scopus)

Ultra-fine metal gate operated graphene optical intensity modulator

Kou, R., Hori, Y., Tsuchizawa, T., Warabi, K., Kobayashi, Y., Harada, Y., Hibino, H., Yamamoto, T., Nakajima, H. & Yamada, K., Dec 19 2016, In : Applied Physics Letters. 109, 25, 251101.

Research output: Contribution to journalArticle

modulators
graphene
silicon
photonics
metals
2015
21 Citations (Scopus)

Gate-controlled semimetal-topological insulator transition in an InAs/GaSb heterostructure

Suzuki, K., Harada, Y., Onomitsu, K. & Muraki, K., Jun 18 2015, In : Physical Review B - Condensed Matter and Materials Physics. 91, 24, 245309.

Research output: Contribution to journalArticle

Metalloids
metalloids
Heterojunctions
insulators
Electric potential
4 Citations (Scopus)

Self-aligned gate-all-around InAs/InP core-shell nanowire field-effect transistors

Sasaki, S., Tateno, K., Zhang, G., Pigot, H., Harada, Y., Saito, S., Fujiwara, A., Sogawa, T. & Muraki, K., Jan 1 2015, In : Japanese Journal of Applied Physics. 54, 4, 04DN04.

Research output: Contribution to journalArticle

Field effect transistors
Nanowires
nanowires
field effect transistors
Annealing
2014
15 Citations (Scopus)

Effects of hydrogen intercalation on transport properties of quasi-free-standing monolayer graphene

Tanabe, S., Takamura, M., Harada, Y., Kageshima, H. & Hibino, H., Jan 1 2014, In : Japanese Journal of Applied Physics. 53, 4 SPEC. ISSUE, 04EN01.

Research output: Contribution to journalArticle

Intercalation
intercalation
Transport properties
Graphene
Monolayers

Emission enhancement in nanowire-nanoantenna system fabricated by nanomanipulation

Ono, M., Kuramochi, E., Zhang, G., Sumikura, H., Harada, Y., Cox, D. & Notomi, M., Jan 1 2014, 2014 IEEE Photonics Conference, IPC 2014. Institute of Electrical and Electronics Engineers Inc., p. 532-533 2 p. 6995485

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nanowires
nanowires
augmentation
Focused ion beams
Gold
1 Citation (Scopus)

Fabrication of a ring structure at the aperture of a hole for the efficient suspension of a lipid bilayer

Goto, T., Harada, Y., Cox, D. & Sumitomo, K., Jan 1 2014, In : Japanese Journal of Applied Physics. 53, 9, 96503.

Research output: Contribution to journalArticle

Lipid bilayers
ring structures
lipids
apertures
Fabrication
6 Citations (Scopus)
Critical currents
Point contacts
Ballistics
ballistics
Superconducting materials
3 Citations (Scopus)

Observation of neuronal death in vitro by SEM and optical microscopy

Kasai, N., Lu, R., Goto, T., Tanaka, A., Tsukada, S., Harada, Y. & Sumitomo, K., Apr 19 2014, In : e-Journal of Surface Science and Nanotechnology. 12, p. 179-184 6 p.

Research output: Contribution to journalArticle

neurons
death
Electron Scanning Microscopy
Neurons
Optical microscopy
2013
73 Citations (Scopus)

Edge channel transport in the InAs/GaSb topological insulating phase

Suzuki, K., Harada, Y., Onomitsu, K. & Muraki, K., Jun 18 2013, In : Physical Review B - Condensed Matter and Materials Physics. 87, 23, 235311.

Research output: Contribution to journalArticle

Inelastic scattering
Heterojunctions
Geometry
Electric potential
inelastic scattering
13 Citations (Scopus)

Encapsulated gate-all-around InAs nanowire field-effect transistors

Sasaki, S., Tateno, K., Zhang, G., Suominen, H., Harada, Y., Saito, S., Fujiwara, A., Sogawa, T. & Muraki, K., Nov 18 2013, In : Applied Physics Letters. 103, 21, 213502.

Research output: Contribution to journalArticle

nanowires
field effect transistors
transconductance
electrodes
atomic layer epitaxy
1 Citation (Scopus)
High electron mobility transistors
field effect transistors
augmentation
Temperature
threshold voltage
15 Citations (Scopus)

Slow noise processes in superconducting resonators

Burnett, J., Lindström, T., Oxborrow, M., Harada, Y., Sekine, Y., Meeson, P. & Tzalenchuk, A. Y., Apr 5 2013, In : Physical Review B - Condensed Matter and Materials Physics. 87, 14, 140501.

Research output: Contribution to journalArticle

Superconducting resonators
Resonators
resonators
flicker
Microwaves
3 Citations (Scopus)

Unipolar behavior in graphene-channel field-effect-transistors with n-type doped SiC source/drain regions

Nagahisa, Y., Harada, Y. & Tokumitsu, E., Nov 25 2013, In : Applied Physics Letters. 103, 22, 223503.

Research output: Contribution to journalArticle

graphene
field effect transistors
annealing
vacuum
2012
62 Citations (Scopus)

Diamond field-effect transistors with 1.3A/mm drain current density by Al 2O 3 passivation layer

Hirama, K., Sato, H., Harada, Y., Yamamoto, H. & Kasu, M., Sep 1 2012, In : Japanese journal of applied physics. 51, 9, 090112.

Research output: Contribution to journalArticle

Drain current
Field effect transistors
Passivation
passivity
Diamonds
9 Citations (Scopus)

High-temperature characteristics in normally off AlGaN/GaN heterostructure field-effect transistors with recessed-gate enhanced-barrier structures

Maeda, N., Hiroki, M., Sasaki, S. & Harada, Y., Aug 1 2012, In : Applied Physics Express. 5, 8, 084201.

Research output: Contribution to journalArticle

High electron mobility transistors
field effect transistors
threshold voltage
high current
high voltages
4 Citations (Scopus)

In 0:75Ga0:25as quantum point contacts utilizing wrap-gate geometry

Irie, H., Harada, Y., Sugiyama, H. & Akazaki, T., Feb 1 2012, In : Applied Physics Express. 5, 2, 024001.

Research output: Contribution to journalArticle

wrap
Point contacts
Geometry
geometry
constrictions
14 Citations (Scopus)

Quantum hall effect and carrier scattering in quasi-free-standing monolayer graphene

Tanabe, S., Takamura, M., Harada, Y., Kageshima, H. & Hibino, H., Dec 1 2012, In : Applied Physics Express. 5, 12, 125101.

Research output: Contribution to journalArticle

Quantum Hall effect
quantum Hall effect
Graphene
Carrier concentration
Monolayers
35 Citations (Scopus)

Thermally stable operation of h-terminated diamond FETs by NO 2 adsorption and Al 2O 3 passivation

Hirama, K., Sato, H., Harada, Y., Yamamoto, H. & Kasu, M., Jul 9 2012, In : IEEE Electron Device Letters. 33, 8, p. 1111-1113 3 p., 6230604.

Research output: Contribution to journalArticle

Diamond
Field effect transistors
Passivation
Diamonds
Adsorption
2011
3 Citations (Scopus)

Aluminum oxide for an effective gate in Si/SiGe two-dimensional electron gas systems

Shin, Y. S., Brunner, R., Shibatomi, A., Obata, T., Otsuka, T., Yoneda, J., Shiraki, Y., Sawano, K., Tokura, Y., Harada, Y., Ishibashi, K. & Tarucha, S., Apr 5 2011, In : Semiconductor Science and Technology. 26, 5, 055004.

Research output: Contribution to journalArticle

Two dimensional electron gas
Aluminum Oxide
Semiconductor quantum dots
electron gas
aluminum oxides
11 Citations (Scopus)

Gate operation of InAs/AlGaSb heterostructures with an atomic-layer- deposited insulating layer

Suzuki, K., Harada, Y., Maeda, F., Onomitsu, K., Yamaguchi, T. & Muraki, K., Dec 1 2011, In : Applied Physics Express. 4, 12, 125702.

Research output: Contribution to journalArticle

Electron traps
Atomic layer deposition
Equivalent circuits
Hysteresis
Surface treatment
2003

A field-induced semiconductor quantum dot defined by a single metallic front-gate

Richter, A., Matsuda, K., Harada, Y., Tamura, H., Akazaki, T., Hirayama, Y. & Takayanagi, H., Dec 1 2003, In : Physica Status Solidi C: Conferences. 4, p. 1317-1320 4 p.

Research output: Contribution to journalConference article

Semiconductor quantum dots
quantum dots
Electric potential
electric potential
Coulomb blockade
2002
3 Citations (Scopus)

Anomalous magnetic flux periodicity of supercurrent in mesoscopic SNS Josephson junctions

Harada, Y., Jensen, S., Akazaki, T. & Takayanagi, H., Feb 15 2002, In : Physica C: Superconductivity and its Applications. 367, 1-4, p. 229-233 5 p.

Research output: Contribution to journalArticle

Magnetic flux
Josephson junctions
magnetic flux
periodic variations
Fluxes
6 Citations (Scopus)

Superconducting junctions using AlGaAs/GaAs heterostructures with high Hc2 NbN electrodes

Takayanagi, H., Akazaki, T., Kawamura, M., Harada, Y. & Nitta, J., Jan 1 2002, In : Physica E: Low-Dimensional Systems and Nanostructures. 12, 1-4, p. 922-926 5 p.

Research output: Contribution to journalConference article

Two dimensional electron gas
aluminum gallium arsenides
Heterojunctions
Superconducting materials
Electrodes
1997

Highly sensitive and wideband optical detector in patterned YBa2Cu3O7-d thin film

Tanaka, K., Harada, Y., Danerud, M., Sekine, M. & Ohtsu, M., Dec 1 1997, Proceedings of SPIE - The International Society for Optical Engineering. Brown, G. J. & Razeghi, M. (eds.). Society of Photo-Optical Instrumentation Engineers, Vol. 2999. p. 316-325 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Thin Films
Responsivity
Detector
Wavelength
broadband
1996
11 Citations (Scopus)

Cooper-pair tunneling in small junctions with tunable Josephson coupling

Harada, Y., Takayanagi, H. & Odintsov, A. A., Jan 1 1996, In : Physical Review B - Condensed Matter and Materials Physics. 54, 9, p. 6608-6613 6 p.

Research output: Contribution to journalArticle

SQUIDs
Networks (circuits)
compressing
charging
electromagnetism
10 Citations (Scopus)

Flux flow and vortex tunneling in two-dimensional arrays of small Josephson junctions

Chen, C., Delsing, P., Haviland, D., Harada, Y. & Claeson, T., Jan 1 1996, In : Physical Review B - Condensed Matter and Materials Physics. 54, 13, p. 9449-9457 9 p.

Research output: Contribution to journalArticle

Josephson junctions
Vortex flow
vortices
Fluxes
Bias currents

Highly sensitive and wideband optical detection in patterned YBa2Cu3O7-δ thin films

Tanaka, K., Arikawa, Y., Sekine, M., Ohtsu, M., Harada, Y. & Danerud, M., Dec 1 1996, In : Applied Physics Letters. 68, 22, p. 3174-3176 3 p.

Research output: Contribution to journalArticle

broadband
thin films
wavelengths
frequency modulation
detectors
1995

Coherent cooper-pair tunneling in a superconducting single electron transistor

Harada, Y., Takayanagi, H. & Odintsov, A. A., 1995, In : Japanese Journal of Applied Physics. 34, 8, p. 4572-4574 3 p.

Research output: Contribution to journalArticle

Single electron transistors
Electric power measurement
single electron transistors
SQUIDs
Superconducting materials
37 Citations (Scopus)

Scaling behavior of the magnetic-field-tuned superconductor-insulator transition in two-dimensional Josephson-junction arrays

Chen, C. D., Delsing, P., Haviland, D. B., Harada, Y. & Claeson, T., Jan 1 1995, In : Physical Review B. 51, 21, p. 15645-15648 4 p.

Research output: Contribution to journalArticle

Josephson junctions
insulators
scaling
magnetic fields
Hall resistance
1994
77 Citations (Scopus)

Charge solitons and quantum fluctuations in two-dimensional arrays of small Josephson junctions

Delsing, P., Chen, C. D., Haviland, D. B., Harada, Y. & Claeson, T., Jan 1 1994, In : Physical Review B. 50, 6, p. 3959-3971 13 p.

Research output: Contribution to journalArticle

Josephson junctions
solitary waves
activation
electrodes
magnetic fields
44 Citations (Scopus)

Fabrication and measurement of a Nb based superconducting single electron transistor

Harada, Y., Haviland, D. B., Delsing, P., Chen, C. D. & Claeson, T., Dec 1 1994, In : Applied Physics Letters. 65, 5, p. 636-638 3 p.

Research output: Contribution to journalArticle

single electron transistors
resonant tunneling
tunnel junctions
niobium
capacitance
2 Citations (Scopus)

Magnetic flux and gate voltage modulation of the current in a superconducting loop of ultra-small tunnel junctions

Harada, Y., Haviland, D. B., Chen, C. D., Delsing, P. & Claeson, T., Feb 2 1994, In : Physica B: Physics of Condensed Matter. 194-196, PART 1, p. 1015-1016 2 p.

Research output: Contribution to journalArticle

Tunnel junctions
Magnetic flux
tunnel junctions
magnetic flux
Capacitance
47 Citations (Scopus)

Observation of the resonant tunneling of cooper pairs

Haviland, D. B., Harada, Y., Delsing, P., Chen, C. D. & Claeson, T., Jan 1 1994, In : Physical Review Letters. 73, 11, p. 1541-1544 4 p.

Research output: Contribution to journalArticle

resonant tunneling
Josephson effect
electric potential
electrodes
electrons
2 Citations (Scopus)

Thermal activation and injection of charge solitons in 2D-arrays of small Josephson junctions.

Delsing, P., Chen, C. D., Haviland, D. B., Harada, Y. & Claeson, T., Feb 2 1994, In : Physica B: Physics of Condensed Matter. 194-196, PART 1, p. 993-994 2 p.

Research output: Contribution to journalArticle

Solitons
Josephson junctions
solitary waves
Chemical activation
activation
1 Citation (Scopus)

Vortex mobility in two-dimensional arrays of small Josephson junctions

Chen, C. D., Delsing, P., Haviland, D. B., Harada, Y. & Claeson, T., Feb 2 1994, In : Physica B: Physics of Condensed Matter. 194-196, PART 1, p. 989-990 2 p.

Research output: Contribution to journalArticle

Josephson junctions
Vortex flow
vortices
Aluminum
Creep
1993

All-Nb thin film microbridge-type Josephson junction for submillimeter-wave detection

Hirose, N., Harada, Y., Sekine, M., Yoshimori, S. & Kawamura, M., Jan 1 1993, In : Infrared Physics. 34, 5, p. 445-455 11 p.

Research output: Contribution to journalArticle

Submillimeter waves
submillimeter waves
Methacrylates
Josephson junctions
Electron beams
1992
1 Citation (Scopus)

Ac Josephson effect in superconducting all-Nb thin-film nanobridges up to 693 GHz

Uzawa, Y., Kawate, E., Hirose, N., Motohashi, I., Harada, Y., Sekine, M., Miki, Y. & Okaji, M., Dec 1 1992, In : Applied Physics Letters. 61, 8, p. 967-969 3 p.

Research output: Contribution to journalArticle

Josephson effect
thin films
niobium
infrared lasers
electric potential
3 Citations (Scopus)

New Positive EB Resist with Strong Resistance to Plasma Damage

Yamaguchi, K., Ozaki, H., Hirao, A., Hirose, N., Harada, Y., Uzawa, Y., Sekine, M., Yoshimori, S. & Kawamura, M., Jan 1 1992, In : Journal of the Electrochemical Society. 139, 3, p. L33-L34

Research output: Contribution to journalArticle

Positrons
Methylmethacrylate
Electron beams
Methacrylates
Copolymers
1991
1 Citation (Scopus)

Analysis of quasiparticle injection three-terminal device

Harada, Y., Hirose, N., Uzawa, Y., Yoshimori, S., Sekine, M. & Kawamura, M., Jan 1 1991, In : Infrared Physics. 32, C, p. 129-137 9 p.

Research output: Contribution to journalArticle

Energy gap
injection
Current voltage characteristics
Transistors
transistors

Characteristics of all-Nb thin film microbridges by nanometer fabrication

Harada, Y., Hirose, N., Uzawa, Y. & Sekine, M., Jan 1 1991, p. 520-522. 3 p.

Research output: Contribution to conferencePaper

Radiation
Fabrication
Thin films
2 Citations (Scopus)

Properties of all-Nb thin film microbridges fabricated by nanometer process

Harada, Y., Hirose, N., Uzawa, Y., Sekine, M., Yoshimori, S. & Kawamura, M., Dec 1 1991, In : Physica C: Superconductivity and its applications. 185-189, PART 4, p. 2555-2556 2 p.

Research output: Contribution to journalArticle

Radiation
Thin films
sensitivity
radiation
thin films
3 Citations (Scopus)

Properties of the nb thin-film nanobridges prepared by nanometer fabrication process

Harada, Y., Hirose, N. & Uzawa, Y., Jan 1 1991, In : Japanese Journal of Applied Physics. 30, 12, p. 3933-3937 5 p.

Research output: Contribution to journalArticle

Reactive ion etching
Nanotechnology
Electron beams
Radiation
Fabrication
1990
self alignment
Triodes
triodes
oscillators
Negative resistance
1986

FABRICATION OF SELF-ALIGNMENT MICRO-CONTACT JOSEPHSON JUNCTIONS.

Hirose, N., Harada, Y., Yoshimori, S. & Kawamura, M., Apr 1986, In : Transactions of the Institute of Electronics and Communication Engineers of Japan. Section E. E69, 4, p. 425-426 2 p.

Research output: Contribution to journalArticle

Reactive ion etching
Millimeter waves
Electron beams
Radiation
Fabrication