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Kiyoshi Asakawa
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Journal Articles

Monolithically grown multi-color InAs quantum dots as a spectral-shape-controllable near-infrared broadband light source

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Nobuhiko Ozaki, Koichi Takeuchi, Shunsuke Ohkouchi, Naoki Ikeda, Yoshimasa Sugimoto, Hisaya Oda, Kiyoshi Asakawa, Richard A. Hogg
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 051121 (2013)
https://doi.org/10.1063/1.4817386
Published: August 2013
View article titled, Monolithically grown multi-color InAs quantum dots as a spectral-shape-controllable near-infrared broadband light source
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Journal Articles

Acceleration and suppression of photoemission of GaAs quantum dots embedded in photonic crystal microcavities

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Takashi Kuroda, Naoki Ikeda, Takaaki Mano, Yoshimasa Sugimoto, Tetsuyuki Ochiai, Keiji Kuroda, Shunsuke Ohkouchi, Nobuyuki Koguchi, Kazuaki Sakoda, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 93, 111103 (2008)
https://doi.org/10.1063/1.2978401
Published: September 2008
View article titled, Acceleration and suppression of photoemission of GaAs quantum dots embedded in photonic crystal microcavities
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Journal Articles

Light amplification by stimulated Raman scattering in AlGaAs-based photonic-crystal line-defect waveguides

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Hisaya Oda, Kuon Inoue, Akio Yamanaka, Naoki Ikeda, Yoshimasa Sugimoto, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 93, 051114 (2008)
https://doi.org/10.1063/1.2965110
Published: August 2008
View article titled, Light amplification by stimulated Raman scattering in AlGaAs-based photonic-crystal line-defect waveguides
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Journal Articles

In situ mask designed for selective growth of InAs quantum dots in narrow regions developed for molecular beam epitaxy system

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Shunsuke Ohkouchi, Yusui Nakamura, Naoki Ikeda, Yoshimasa Sugimoto, Kiyoshi Asakawa
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 78, 073908 (2007)
https://doi.org/10.1063/1.2756624
Published: July 2007
View article titled, In situ mask designed for selective growth of InAs quantum dots in narrow regions developed for molecular beam epitaxy system
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Journal Articles

Topology optimization of waveguide bends with wide, flat bandwidth in air-bridge-type photonic crystal slabs

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Yoshinori Watanabe, Naoki Ikeda, Yoshimasa Sugimoto, Yoshiaki Takata, Yoshinori Kitagawa, Akio Mizutani, Nobuhiko Ozaki, Kiyoshi Asakawa
Journal: Journal of Applied Physics
J. Appl. Phys. 101, 113108 (2007)
https://doi.org/10.1063/1.2739317
Published: June 2007
View article titled, Topology optimization of waveguide bends with wide, flat bandwidth in air-bridge-type photonic crystal slabs
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Journal Articles

Self-phase modulation in photonic-crystal-slab line-defect waveguides

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Hisaya Oda, Kuon Inoue, Yu Tanaka, Naoki Ikeda, Yoshimasa Sugimoto, Hiroshi Ishikawa, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 90, 231102 (2007)
https://doi.org/10.1063/1.2746068
Published: June 2007
View article titled, Self-phase modulation in photonic-crystal-slab line-defect waveguides
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Journal Articles

Design, fabrication, and characterization of a two-dimensional photonic-crystal symmetric Mach-Zehnder interferometer for optical integrated circuits

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Yu Tanaka, Yoshimasa Sugimoto, Naoki Ikeda, Hitoshi Nakamura, Kyozo Kanamoto, Kiyoshi Asakawa, Kuon Inoue
Journal: Applied Physics Letters
Appl. Phys. Lett. 86, 141104 (2005)
https://doi.org/10.1063/1.1898431
Published: March 2005
View article titled, Design, fabrication, and characterization of a two-dimensional photonic-crystal symmetric Mach-Zehnder interferometer for optical integrated circuits
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Journal Articles

Photonic bandpass filter for 1550 nm fabricated by femtosecond direct laser ablation

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Ming Li, Kiyotaka Mori, Makoto Ishizuka, Xinbing Liu, Yoshimasa Sugimoto, Naoki Ikeda, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 83, 216–218 (2003)
https://doi.org/10.1063/1.1592619
Published: July 2003
View article titled, Photonic bandpass filter for 1550 nm fabricated by femtosecond direct laser ablation
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Journal Articles

Effects of lateral quantum dot pitch on the formation of vertically aligned InAs site-controlled quantum dots

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Tao Yang, Shigeru Kohmoto, Hitoshi Nakamura, Kiyoshi Asakawa
Journal: Journal of Applied Physics
J. Appl. Phys. 93, 1190–1194 (2003)
https://doi.org/10.1063/1.1530728
Published: January 2003
View article titled, Effects of lateral quantum dot pitch on the formation of vertically aligned InAs site-controlled quantum dots
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Journal Articles

Fabrication and characterization of different types of two-dimensional AlGaAs photonic crystal slabs

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Yoshimasa Sugimoto, Naoki Ikeda, Niclas Carlsson, Kiyoshi Asakawa, Noriko Kawai, Kuon Inoue
Journal: Journal of Applied Physics
J. Appl. Phys. 91, 922–929 (2002)
https://doi.org/10.1063/1.1429795
Published: February 2002
View article titled, Fabrication and characterization of different types of two-dimensional AlGaAs photonic crystal slabs
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Journal Articles

Site-controlled InAs single quantum-dot structures on GaAs surfaces patterned by in situ electron-beam lithography

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Tomonori Ishikawa, Tetsuya Nishimura, Shigeru Kohmoto, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 76, 167–169 (2000)
https://doi.org/10.1063/1.125691
Published: January 2000
View article titled, Site-controlled InAs single quantum-dot structures on GaAs surfaces patterned by in situ electron-beam lithography
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Journal Articles

Site-controlled self-organization of individual InAs quantum dots by scanning tunneling probe-assisted nanolithography

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Shigeru Kohmoto, Hitoshi Nakamura, Tomonori Ishikawa, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 75, 3488–3490 (1999)
https://doi.org/10.1063/1.125364
Published: November 1999
View article titled, Site-controlled self-organization of individual InAs quantum dots by scanning tunneling probe-assisted nanolithography
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Journal Articles

Site control of self-organized InAs dots on GaAs substrates by in situ electron-beam lithography and molecular-beam epitaxy

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Tomonori Ishikawa, Shigeru Kohmoto, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 73, 1712–1714 (1998)
https://doi.org/10.1063/1.122254
Published: September 1998
View article titled, Site control of self-organized InAs dots on GaAs substrates by in situ electron-beam lithography and molecular-beam epitaxy
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Journal Articles

Theoretical analysis of optimal conditions in quantum structure semiconductor lasers for low threshold current

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Yoshihiro Nambu, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 67, 1509–1511 (1995)
https://doi.org/10.1063/1.114475
Published: September 1995
View article titled, Theoretical analysis of optimal conditions in quantum structure semiconductor lasers for low threshold current
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Journal Articles

Time‐resolved investigations of sidewall recombination and in‐plane diffusivity in dry‐etched InGaAs/GaAs air‐post structures

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Yoshihiro Nambu, Hiroyuki Yokoyama, Takashi Yoshikawa, Yoshimasa Sugimoto, Kiyoshi Asakawa
Journal: Applied Physics Letters
Appl. Phys. Lett. 65, 481–483 (1994)
https://doi.org/10.1063/1.112344
Published: July 1994
View article titled, Time‐resolved investigations of sidewall recombination and in‐plane diffusivity in dry‐etched InGaAs/GaAs air‐post structures
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Journal Articles

Direct observation of GaAs surface cleaning process under hydrogen radical beam irradiation

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Hiroshi Iwata, Kiyoshi Asakawa
Journal: AIP Conference Proceedings
AIP Conf. Proc. 227, 122–125 (1991)
https://doi.org/10.1063/1.40658
Published: May 1991
View article titled, Direct observation of GaAs surface cleaning process under hydrogen radical beam irradiation
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Journal Articles

Fabrication of dry‐etched cavity GaAs/AlGaAs multiquantum‐well lasers with high spatial uniformity

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Tomoyuki Yamada, Tonao Yuasa, Kiyoshi Asakawa, Mitsuru Shimazu, Makoto Ishii, Mamoru Uchida
Journal: Journal of Applied Physics
J. Appl. Phys. 64, 2286–2290 (1988)
https://doi.org/10.1063/1.341682
Published: September 1988
View article titled, Fabrication of dry‐etched cavity GaAs/AlGaAs multiquantum‐well lasers with high spatial uniformity
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Journal Articles

Performance of dry‐etched short cavity GaAs/AlGaAs multiquantum‐well lasers

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Tonao Yuasa, Tomoyuki Yamada, Kiyoshi Asakawa, Makoto Ishii, Mamoru Uchida
Journal: Journal of Applied Physics
J. Appl. Phys. 63, 1321–1327 (1988)
https://doi.org/10.1063/1.339958
Published: March 1988
View article titled, Performance of dry‐etched short cavity GaAs/AlGaAs multiquantum‐well lasers
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Journal Articles

GaAs and AlGaAs crystallographic etching with low‐pressure chlorine radicals in an ultrahigh‐vacuum system

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Sumio Sugata, Kiyoshi Asakawa
Journal: Journal of Vacuum Science & Technology B
J. Vac. Sci. Technol. B 5, 894–901 (1987)
https://doi.org/10.1116/1.583686
Published: July 1987
View article titled, GaAs and AlGaAs crystallographic etching with low‐pressure chlorine radicals in an ultrahigh‐vacuum system
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Journal Articles

Very high relaxation oscillation frequency in dry‐etched short cavity GaAs/AlGaAs multiquantum well lasers

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Tonao Yuasa, Tomoyuki Yamada, Kiyoshi Asakawa, Makoto Ishii, Mamoru Uchida
Journal: Applied Physics Letters
Appl. Phys. Lett. 50, 1122–1124 (1987)
https://doi.org/10.1063/1.97936
Published: April 1987
View article titled, Very high relaxation oscillation frequency in dry‐etched short cavity GaAs/AlGaAs multiquantum well lasers
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