Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Tsukuru Katsuyama"'
Publikováno v:
Infrared Physics & Technology. 88:194-199
Promising results of InGaAs/GaAsSb material systems suggest that it is an alternate for extended InGaAs and HgCdTe in the SWIR region. Understanding the dark current that is caused by the deep level will further improve device performance. In this wo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fef9a6048510eda51d32afeb2a7d0883
https://doi.org/10.1016/j.infrared.2017.11.025
https://doi.org/10.1016/j.infrared.2017.11.025
Autor:
Masaki Migita, Takashi Kato, Tsukuru Katsuyama, Makoto Murata, Jun-ichi Hashimoto, Hiroki Mori, Mitsuru Ekawa, Yukihiro Tsuji, Hiroyuki Yoshinaga, Yasuhiro Iguchi
Publikováno v:
Quantum Sensing and Nano Electronics and Photonics XVI.
Mid-infrared sensing with a Quantum Cascade Laser (QCL) as a light source is expected to offer a high sensitivity, a short measurement time, and a good portability compared to conventional methods. However, commercially available QCLs have high power
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d46315082845ba077d741e4153833d4
https://doi.org/10.1117/12.2509039
https://doi.org/10.1117/12.2509039
Autor:
Tsukuru Katsuyama, Jun-ichi Hashimoto, Yasuhiro Iguchi, Takashi Kato, Michio Murata, Hiroyuki Yoshinaga, Hiroki Mori, Mitsuru Ekawa, Yukihiro Tsuji
Publikováno v:
Electronics Letters. 53:549-551
A low power-consumption distributed feedback quantum cascade laser (DFB-QCL) is developed for gas-sensing in 7 μm wavelength region. The threshold power-consumption was as low as 0.93 W with the sufficient output power of 20 mW at 20°C under contin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d614d80a1946de2656d588e19d10003
https://doi.org/10.1049/el.2016.4269
https://doi.org/10.1049/el.2016.4269
Autor:
Makoto Murata, Tsukuru Katsuyama, Hiroki Mori, Masaki Migita, Hiroyuki Yoshinaga, Yasuhiro Iguchi, Jun-ichi Hashimoto, Mitsuru Ekawa, Yukihiro Tsuji, Takashi Kato
Publikováno v:
2018 IEEE International Semiconductor Laser Conference (ISLC).
We report a successful high-temperature operation up to 200 °C of a DFB-QCL under pulse condition. The DFB-QCL maintained a single-mode operation between −40 °C and 200 °C without a mode-hopping, leading to wide wavelength shift of 123 nm for a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c84e3371fd638211893187728cd071f2
https://doi.org/10.1109/islc.2018.8516152
https://doi.org/10.1109/islc.2018.8516152
Autor:
Jun-ichi Hashimoto, Takashi Kato, Masaki Migita, Mitsuru Ekawa, Tsukuru Katsuyama, Yukihiro Tsuji, Yasuhiro Iguchi, Hiroyuki Yoshinaga, Makoto Murata, Hiroki Mori
Publikováno v:
Quantum Sensing and Nano Electronics and Photonics XV.
Sensing method with Quantum Cascade Laser (QCL) as a light source is expected to offer a high sensitivity, a short measurement time, and a good portability compared to conventional methods. However, commercially available QCLs have high power-consump
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0787fe991e71e3751bfcc1ba9d09672d
https://doi.org/10.1117/12.2287696
https://doi.org/10.1117/12.2287696
Autor:
Tsukuru Katsuyama, Yasuhiro Iguchi, Hiroshi Inada, Tomo Tanaka, Naoki Oda, Yoshihiro Nambu, Tsuyoshi Yamamoto, Masahiko Sano, Sota Kagami
Publikováno v:
Infrared Technology and Applications XLIII.
The authors estimate signal-to-noise ratios (SNRs) and contrasts for both InGaAs SWIR camera (cut-off wavelength λ co ~1.7 μm) and type II superlattice (T2SL) SWIR camera (λ co ~2.3 μm), under such situations as human skin as an object and vegeta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30ddcce6083753226defff4e1e151701
https://doi.org/10.1117/12.2261052
https://doi.org/10.1117/12.2261052
Autor:
Tadahiro Ohmi, Tsukuru Katsuyama, Isao Makabe, Shigetoshi Sugawa, Yasuyuki Shirai, Kenichi Nakamura, Yukihiro Tsuji, Akinobu Teramoto, Ken Nakata, Tadashi Watanabe
Publikováno v:
physica status solidi c. 10:1557-1560
In order to improve reliability and yield of gallium nitride (GaN) devices, we have developed the formation of an ultra-clean GaN surface and an interface of a passivation layer. The residue or termination materials on the GaN surface were analyzed a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dd7978ae24d901eb3074d3875053b98
https://doi.org/10.1002/pssc.201300225
https://doi.org/10.1002/pssc.201300225
Autor:
Jun-ichi Hashimoto, Tsukuru Katsuyama, Hiroyuki Yoshinaga, Yukihiro Tsuji, Makoto Murata, Hiroki Mori, Mitsuru Ekawa
Publikováno v:
SPIE Proceedings.
Quantum cascade lasers (QCLs) are promising as compact light sources in the mid-infrared region. In order to put them into a practical use, their relatively high threshold currents should be reduced. Facet reflectivity increase by distributed Bragg r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa772c0f1baad1faa568f5f99d233c3b
https://doi.org/10.1117/12.2212332
https://doi.org/10.1117/12.2212332
Autor:
Kouhei Miura, Kenichi Machinaga, Masaki Migita, Sundararajan Balasekaran, Takahiko Kawahara, Yasuhiro Iguchi, Hiroshi Inada, Tsukuru Katsuyama
Publikováno v:
SPIE Proceedings.
Stray light in focal plane array (FPA) deteriorates the accuracy of hyper spectral imaging. Multiple reflections between FPA window and peripheral region of a sensor chip are considered to be the major sources of stray light. One idea for suppressing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60ce0166d034e6e57d04dcc9dc6042f9
https://doi.org/10.1117/12.2213971
https://doi.org/10.1117/12.2213971
Publikováno v:
Journal of Crystal Growth. 298:116-120
We have investigated the optical properties of GaInNAs/GaAs single quantum wells grown by metalorganic vapor-phase epitaxy on misoriented GaAs substrates with the use of photoluminescence (PL) spectroscopy sensitive to localization of carriers and ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81dea4f249679724d7d6d31195310cf4
https://doi.org/10.1016/j.jcrysgro.2006.10.011
https://doi.org/10.1016/j.jcrysgro.2006.10.011