Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Tetsuomi Sogawa"'
Publikováno v:
Crystals, Vol 3, Iss 1, Pp 120-140 (2013)
In Raman spectroscopy of graphite and graphene, the D band at ∼ 1355 cm−1 is used as the indication of the dirtiness of a sample. However, our analysis suggests that the physics behind the D band is closely related to a very clear idea for descri
Externí odkaz:
https://doaj.org/article/476ab4f8130b42968490ca27cfc0b3de
Publikováno v:
AIP Advances, Vol 5, Iss 9, Pp 097152-097152-6 (2015)
We determine phonon decay rate by measuring the temperature dependence of coherent phonons in p-type Si under Fano resonance, where there is interference between the continuum and discrete states. As the temperature decreases, the decay rate of coher
Externí odkaz:
https://doaj.org/article/5deaf6d681564dfb8a77488e99798f4c
Publikováno v:
AIP Advances, Vol 4, Iss 10, Pp 107124-107124-11 (2014)
Optical nonlinear effects are examined using a two-color micro-photoluminescence (micro-PL) method in a coherently coupled exciton-biexciton system in a single quantum dot (QD). PL and photoluminescence excitation spectroscopy (PLE) are employed to m
Externí odkaz:
https://doaj.org/article/11410783194c41d4ac1ef1753bc68ff2
Publikováno v:
Journal of Nanotechnology, Vol 2012 (2012)
The VLS (vapor-liquid-solid) method is one of the promising techniques for growing vertical III-V compound semiconductor nanowires on Si for application to optoelectronic circuits. Heterostructures grown in the axial direction by the VLS method and i
Externí odkaz:
https://doaj.org/article/5cc6745018734017baf2f9d801bc0658
Publikováno v:
AIP Advances, Vol 3, Iss 5, Pp 052107-052107 (2013)
We investigated the growth, structure, and electrical properties of InAs nanowires grown in the Au-free vapor-liquid-solid mode. We demonstrated the self-assisted vapor-liquid-solid growth of InAs nanowire with self-assembled In particles on InP subs
Externí odkaz:
https://doaj.org/article/4289c01b8a2f480288a4969b02d81344
Autor:
Tomoya Akatsuka, Hiromitsu Imai, Masao Takamoto, Ichiro Ushijima, Takashi Goh, Toshikazu Hashimoto, Hidetoshi Katori, Katsuya Oguri, Tetsuomi Sogawa
Publikováno v:
Optical Fiber Communication Conference (OFC) 2023.
We demonstrate a 190-km-long optical fiber link that achieves high-stability frequency transfer in noisy environments. A four-stage cascaded link with ultralow-noise laser repeater stations connects distant optical lattice clocks without deterioratin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::063b481e58c217a1d42b9626c88dd8a4
https://doi.org/10.1364/ofc.2023.m3j.2
https://doi.org/10.1364/ofc.2023.m3j.2
Autor:
Tetsuomi Sogawa
Publikováno v:
NTT Technical Review. 19:1-6
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f5a52da6733f4a0ba2f0bf4905dcf01
https://doi.org/10.53829/ntr202107tp1
https://doi.org/10.53829/ntr202107tp1
Autor:
Koji Onomitsu, Yukio Tanaka, Hideki Gotoh, A. M. Stramma, Haruki Sanada, Makoto Kohda, Junsaku Nitta, Yoji Kunihashi, F. Tagarelli, Tetsuomi Sogawa
Publikováno v:
Communications Physics, Vol 3, Iss 1, Pp 1-7 (2020)
Conventional ways of confining charges in semiconductors employ advanced lithographic and crystal-growth techniques. The construction of micro/nano-scale structures is also essential for manipulating spins. However, existing techniques are not always
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cbdcfc006bc5a2563a91ab72f71fa39
http://link.springer.com/article/10.1038/s42005-020-0280-z
http://link.springer.com/article/10.1038/s42005-020-0280-z
Autor:
Katsuya Oguri, Hidetoshi Katori, Atsushi Ishizawa, Hiromitsu Imai, Hideki Gotoh, Takashi Goh, Toshikazu Hashimoto, T. Akatsuka, Noriaki Ohmae, Tetsuomi Sogawa, Ichiro Ushijima, Masao Takamoto
Publikováno v:
Optics express. 28(7)
We report a cascaded optical fiber link which connects laboratories in RIKEN, the University of Tokyo, and NTT within a 100-km region using a transfer light at 1397 nm, a subharmonic of the Sr clock frequency. The multiple cascaded link employing sev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b5b1bc8b1489c30820e480bda1291b7
https://pubmed.ncbi.nlm.nih.gov/32225530
https://pubmed.ncbi.nlm.nih.gov/32225530