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Research Output 2001 2019

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Article
2019

Camera sensor platform for high speed video data transmission using a wideband electro-optic polymer modulator

Cheng, X., Qiu, F., Spring, A. M., Sasaki, M., Kashino, T., Ozawa, M., Nawata, H., Kita, T., Sugihara, O. & Yokoyama, S., 2019 Feb 4, In : Optics Express. 27, 3, p. 1877-1883 7 p.

Research output: Contribution to journalArticle

video data
data transmission
electro-optics
modulators
platforms
1 Citation (Scopus)

Compact thermo-optic MZI switch in silicon-on-insulator using direct carrier injection

Mendez Astudillo, M., Okamoto, M., Ito, Y. & Kita, T., 2019 Jan 21, In : Optics Express. 27, 2, p. 899-906 8 p.

Research output: Contribution to journalArticle

carrier injection
switches
direct current
resistance heating
insulators
2018

Compact narrow-linewidth optical negative feedback laser with Si optical filter

Aoyama, K., Kobayashi, S., Wada, M., Yokota, N., Kita, T. & Yasaka, H., 2018 Nov 1, In : Applied Physics Express. 11, 11, 112703.

Research output: Contribution to journalArticle

negative feedback
Optical filters
optical filters
Linewidth
semiconductor lasers
2 Citations (Scopus)

Tunable Dual-Wavelength Heterogeneous Quantum Dot Laser Diode with a Silicon External Cavity

Kita, T., Matsumoto, A., Yamamoto, N. & Yamada, H., 2018 Jan 15, In : Journal of Lightwave Technology. 36, 2, p. 219-224 6 p.

Research output: Contribution to journalArticle

semiconductor lasers
quantum dots
cavities
silicon
wavelengths
2016
15 Citations (Scopus)

Heterogeneous quantum dot/silicon photonics-based wavelength-tunable laser diode with a 44 nm wavelength-tuning range

Kita, T., Yamamoto, N., Matsumoto, A., Kawanishi, T. & Yamada, H., 2016 Apr 1, In : Japanese Journal of Applied Physics. 55, 4, 04EH11.

Research output: Contribution to journalArticle

Laser tuning
tunable lasers
Photonics
Semiconductor quantum dots
Semiconductor lasers
9 Citations (Scopus)
Laser tuning
tunable lasers
Linewidth
Photonics
Semiconductor lasers
2015
10 Citations (Scopus)

Compact silicon photonic wavelength-tunable laser diode with ultra-wide wavelength tuning range

Kita, T., Tang, R. & Yamada, H., 2015 Mar 16, In : Applied Physics Letters. 106, 11, 111104.

Research output: Contribution to journalArticle

tunable lasers
semiconductor lasers
tuning
photonics
silicon
9 Citations (Scopus)

Narrow-spectral-linewidth silicon photonic wavelength-tunable laser with highly asymmetric Mach-Zehnder interferometer

Tang, R., Kita, T. & Yamada, H., 2015 Jan 1, In : Optics Letters. 40, 7, p. 1504-1507 4 p.

Research output: Contribution to journalArticle

Mach-Zehnder interferometers
tunable lasers
photonics
tunable filters
circumferences
3 Citations (Scopus)

Optimum waveguide-core size for reducing device property distribution of Si-wire waveguide devices

Soma, M., Kita, T., Tanushi, Y., Toyama, M., Seki, M., Yokoyama, N., Ohtsuka, M. & Yamada, H., 2015 Jan 1, In : Japanese Journal of Applied Physics. 54, 4, 04DG03.

Research output: Contribution to journalArticle

distribution (property)
Waveguides
wire
Wire
waveguides
75 Citations (Scopus)

Silicon photonic hybrid ring-filter external cavity wavelength tunable lasers

Kobayashi, N., Sato, K., Namiwaka, M., Yamamoto, K., Watanabe, S., Kita, T., Yamada, H. & Yamazaki, H., 2015 Mar 15, In : Journal of Lightwave Technology. 33, 6, p. 1241-1246 6 p., 6994779.

Research output: Contribution to journalArticle

tunable lasers
photonics
filters
cavities
rings
16 Citations (Scopus)

Ultra-compact wavelength-tunable quantum-dot laser with silicon-photonics double ring filter

Kita, T., Yamamoto, N., Kawanishi, T. & Yamada, H., 2015 Jun 1, In : Applied Physics Express. 8, 6, 062701.

Research output: Contribution to journalArticle

Quantum dot lasers
Photonics
quantum dots
photonics
filters
2014
15 Citations (Scopus)

Long external cavity Si photonic wavelength tunable laser diode

Kita, T., Nemoto, K. & Yamada, H., 2014 Jan 1, In : Japanese Journal of Applied Physics. 53, 4 SPEC. ISSUE, 04EG04.

Research output: Contribution to journalArticle

Laser tuning
tunable lasers
Linewidth
Photonics
Semiconductor lasers
25 Citations (Scopus)

Silicon Photonic Wavelength-Tunable Laser Diode with Asymmetric Mach-Zehnder Interferometer

Kita, T., Nemoto, K. & Yamada, H., 2014 Jul 1, In : IEEE Journal on Selected Topics in Quantum Electronics. 20, 4, 6690107.

Research output: Contribution to journalArticle

Laser tuning
Mach-Zehnder interferometers
tunable lasers
Photonics
Semiconductor lasers
2012
2 Citations (Scopus)

Analysis of phase matching conditions for generating second harmonic in ZnO channel waveguides

Taira, Y., Kita, T., Yoshio, E., Teraoka, M. & Yamada, H., 2012 Apr 1, In : Japanese Journal of Applied Physics. 51, 4 PART 2, 04DG04.

Research output: Contribution to journalArticle

Phase matching
phase matching
Waveguides
waveguides
harmonics
30 Citations (Scopus)

Narrow-spectral-linewidth wavelength-tunable laser diode with si wire waveguide ring resonators

Nemoto, K., Kita, T. & Yamada, H., 2012 Aug 1, In : Applied Physics Express. 5, 8, 082701.

Research output: Contribution to journalArticle

Laser tuning
tunable lasers
Linewidth
Semiconductor lasers
Resonators
2011
2 Citations (Scopus)

Analysis of the nonlinear optical parameter of ZnO channel waveguides

Teraoka, E. Y. M., Kita, T., Broaddus, D. H., Tsukazaki, A., Kawasaki, M., Gaeta, A. L. & Yamada, H., 2011 Apr 1, In : Japanese Journal of Applied Physics. 50, 4 PART 2, 04DG01.

Research output: Contribution to journalArticle

Waveguides
waveguides
nonlinearity
5 Citations (Scopus)

Optical crossing and integration using hybrid Si-wire/silica waveguides

Wakayama, Y., Kita, T. & Yamada, H., 2011 Apr 1, In : Japanese Journal of Applied Physics. 50, 4 PART 2, 04DG20.

Research output: Contribution to journalArticle

Waveguides
Silica
wire
Wire
silicon dioxide
2010
13 Citations (Scopus)

Self-phase modulation at visible wavelengths in nonlinear ZnO channel waveguides

Teraoka, E. Y. M., Broaddus, D. H., Kita, T., Tsukazaki, A., Kawasaki, M., Gaeta, A. L. & Yamada, H., 2010 Aug 16, In : Applied Physics Letters. 97, 7, 071105.

Research output: Contribution to journalArticle

phase modulation
waveguides
visible spectrum
wavelengths
phase shift
7 Citations (Scopus)

ZnO channel waveguides for nonlinear optical applications

Teraoka, E. Y. M., Kita, T., Tsukazaki, A., Kawasaki, M., Ohtera, Y. & Yamada, H., 2010 Apr 1, In : Japanese Journal of Applied Physics. 49, 4 PART 2, 04DG15.

Research output: Contribution to journalArticle

Waveguides
waveguides
Group velocity dispersion
Sapphire
group velocity
2008
3 Citations (Scopus)

Effect of vertical electric fields on exciton fine structure of GaAs natural quantum dots

Marcet, S., Kita, T., Ohtani, K. & Ohno, H., 2008 Apr 1, In : Physica E: Low-Dimensional Systems and Nanostructures. 40, 6, p. 2069-2071 3 p.

Research output: Contribution to journalArticle

Excitons
Semiconductor quantum dots
fine structure
quantum dots
Electric fields

Fabrication of a few-electron In0.56Ga0.44As vertical quantum dot with an Al2O3 gate insulator

Kita, T., Chiba, D., Ohno, Y. & Ohno, H., 2008 Apr 1, In : Physica E: Low-Dimensional Systems and Nanostructures. 40, 6, p. 1930-1932 3 p.

Research output: Contribution to journalArticle

Semiconductor quantum dots
quantum dots
insulators
Resonant tunneling diodes
Fabrication

Fine structure in magnetospectrum of vertical quantum dot

Agafonov, O. B., Kita, T., Ohno, H. & Haug, R. J., 2008 Mar 1, In : Physica E: Low-Dimensional Systems and Nanostructures. 40, 5, p. 1630-1632 3 p.

Research output: Contribution to journalArticle

Resonant tunneling
Semiconductor quantum dots
fine structure
quantum dots
Coulomb blockade
2007
7 Citations (Scopus)

(In,Ga)As gated-vertical quantum dot with an Al2O3 insulator

Kita, T., Chiba, D., Ohno, Y. & Ohno, H., 2007 Feb 19, In : Applied Physics Letters. 90, 6, 062102.

Research output: Contribution to journalArticle

quantum dots
insulators
atomic layer epitaxy
transport properties
diamonds
1 Citation (Scopus)

A few-electron vertical In0.56Ga0.44As quantum dot with an insulating gate

Kita, T., Chiba, D., Ohno, Y. & Ohno, H., 2007 Dec 14, In : Applied Physics Letters. 91, 23, 232101.

Research output: Contribution to journalArticle

quantum dots
resonant tunneling diodes
atomic layer epitaxy
electrons
insulators
425 Citations (Scopus)

Quantum hall effect in polar oxide heterostructures

Tsukazaki, A., Ohtomo, A., Kita, T., Ohno, Y., Ohno, H. & Kawasaki, M., 2007 Mar 9, In : Science. 315, 5817, p. 1388-1391 4 p.

Research output: Contribution to journalArticle

Oxides
Electrons
Physics
Magnesium
Lasers
2006
35 Citations (Scopus)

Bias voltage dependence of the electron spin injection studied in a three-terminal device based on a (Ga,Mn) As/ n+-GaAs Esaki diode

Kohda, M., Kita, T., Ohno, Y., Matsukura, F. & Ohno, H., 2006 Jul 17, In : Applied Physics Letters. 89, 1, 012103.

Research output: Contribution to journalArticle

tunnel diodes
electron spin
light emitting diodes
injection
electric potential
7 Citations (Scopus)

Pulse-width and magnetic-field dependences of current-induced magnetization switching in a (Ga,Mn)As magnetic tunnel junction

Chiba, D., Kita, T., Matsukura, F. & Ohno, H., 2006 May 25, In : Journal of Applied Physics. 99, 8, 08G514.

Research output: Contribution to journalArticle

tunnel junctions
pulse duration
magnetization
magnetic fields
critical current
2005
1 Citation (Scopus)

Spin-polarized transport in adiabatic quantum point contact with strong Rashba spin-orbit interaction

Kita, T., Kakegawa, T., Akabori, M. & Yamada, S., 2005 Nov 1, In : Solid State Communications. 136, 8, p. 479-483 5 p.

Research output: Contribution to journalArticle

Point contacts
spin-orbit interactions
Orbits
heterojunctions
Heterojunctions
2004
131 Citations (Scopus)

Current-driven magnetization reversal in a ferromagnetic semiconductor (Ga, Mn)As/GaAs/(Ga, Mn)As tunnel junction

Chiba, D., Sato, Y., Kita, T., Matsukura, F. & Ohno, H., 2004 Nov 19, In : Physical Review Letters. 93, 21, 216602.

Research output: Contribution to journalArticle

tunnel junctions
magnetization
magnetic storage
torque
critical current
2003
2 Citations (Scopus)

Observation of e2/h conductance steps in a side-gate point contact on In0.75Ga0.25As/In0.75Al 0.25As heterostructure

Kita, T., Gozu, S., Sato, Y. & Yamada, S., 2003 Dec 1, In : Journal of Superconductivity and Novel Magnetism. 16, 2, p. 327-329 3 p.

Research output: Contribution to journalArticle

Point contacts
Heterojunctions
heterojunctions
Magnetic fields
Spin polarization
2002
5 Citations (Scopus)

Spontaneous spin-splitting observed in resonant tunneling diode with narrow band-gap asymmetric quantum well

Yamada, S., Kikutani, T., Gozu, S., Sato, Y. & Kita, T., 2002 Mar 1, In : Physica E: Low-Dimensional Systems and Nanostructures. 13, 2-4, p. 815-818 4 p.

Research output: Contribution to journalArticle

Resonant tunneling diodes
resonant tunneling diodes
Semiconductor quantum wells
narrowband
Energy gap
2001
3 Citations (Scopus)

An investigation of tunable spin-orbit interactions in front-gated In0.75Ga0.25As/In0.75Al0.25As heterojunctions

Sato, Y., Gozu, S. I., Kita, T. & Yamada, S., 2001 May 1, In : Physica E: Low-Dimensional Systems and Nanostructures. 10, 1-3, p. 77-80 4 p.

Research output: Contribution to journalArticle

spin-orbit interactions
Heterojunctions
heterojunctions
synchronism
Orbits
2 Citations (Scopus)

Critical layer thickness study in In0.75Ga0.25As/In0.5Al0.5As pseudomorphic resonant tunneling diode structure grown on GaAs substrates

Gozu, S. I., Kita, T., Kikutani, T. & Yamada, S., 2001 Jan 1, In : Journal of Crystal Growth. 227, 228, p. 161-166 6 p.

Research output: Contribution to journalArticle

Resonant tunneling diodes
resonant tunneling diodes
Photoluminescence
Buffers
buffers
2 Citations (Scopus)
Strain relaxation
Indium
Heterojunctions
Modulation
Electron mobility
18 Citations (Scopus)
Two dimensional electron gas
electron gas
Heterojunctions
heterojunctions
Magnetic fields
197 Citations (Scopus)

Large spontaneous spin splitting in gate-controlled two-dimensional electron gases at normal In0.75Ga0.25As/In0.75Al0.25As heterojunctions

Sato, Y., Kita, T., Gozu, S. & Yamada, S., 2001 Jun 1, In : Journal of Applied Physics. 89, 12, p. 8017-8021 5 p.

Research output: Contribution to journalArticle

electron gas
heterojunctions
electron mobility
wafers
orbits