Zobrazeno 1 - 10
of 450
pro vyhledávání: '"MASAHIRO ASADA"'
Autor:
Safumi Suzuki, Masahiro Asada
Publikováno v:
Applied Physics Express, Vol 17, Iss 7, p 070101 (2024)
During the last two decades, rapid advancements in RT oscillators that use resonant tunneling diodes (RTDs) have been reported, with operations approaching the limits of electronic device oscillators. Although RTD devices are known for HF operation,
Externí odkaz:
https://doaj.org/article/d25a626c08d749d38ba14a205d3e1d79
Publikováno v:
AIP Advances, Vol 9, Iss 8, Pp 085020-085020-6 (2019)
We proposed and fabricated resonant-tunneling-diode (RTD) terahertz oscillators integrated with a cylindrical cavity. Oscillation frequency of 3 THz is expected from theoretical analysis. As a preliminary experiment, the proposed oscillator was fabri
Externí odkaz:
https://doaj.org/article/2f034ad18cb74d54b63f76b677e2afed
Publikováno v:
Sensors, Vol 21, Iss 13, p 4367 (2021)
We used a resonant-tunneling-diode (RTD) oscillator as the source of a terahertz-wave radar based on the principle of the swept-source optical coherence tomography (SS-OCT). Unlike similar reports in the terahertz range, we apply the stepwise frequen
Externí odkaz:
https://doaj.org/article/eb4a06ee581f4e7e8383b3b26152aad3
Autor:
Masahiro Asada, Safumi Suzuki
Publikováno v:
Sensors, Vol 21, Iss 4, p 1384 (2021)
A compact source is important for various applications utilizing terahertz (THz) waves. In this paper, the recent progress in resonant-tunneling diode (RTD) THz oscillators, which are compact semiconductor THz sources, is reviewed, including principl
Externí odkaz:
https://doaj.org/article/f474226a3fd6483bbf5a99cfb4690f1a
Publikováno v:
Sensors, Vol 20, Iss 23, p 6848 (2020)
We introduce a new principle for distance measurement in the terahertz-wave range using a resonant-tunneling-diode (RTD) oscillator as a source at 511 GHz and relying on the frequency-modulated continuous-wave (FMCW) radar technique. Unlike the usual
Externí odkaz:
https://doaj.org/article/0566fe96005644eaadcdc6382efbd93a
Publikováno v:
AIP Advances, Vol 7, Iss 3, Pp 035020-035020-5 (2017)
We report a terahertz (THz)-wave differential detection based on simultaneous dual-wavelength up-conversion in a nonlinear optical MgO:LiNbO3 crystal with optical and electronic THz-wave sources. The broadband parametric gain and noncollinear phase-m
Externí odkaz:
https://doaj.org/article/b57e12d46c38440e9adef39063fab5ae
Publikováno v:
Photonics, Vol 5, Iss 4, p 52 (2018)
We present the principle of a terahertz-wave radar and its proof-of-concept experimental verification. The radar is based on a 522 GHz resonant-tunneling-diode oscillator, whose terahertz output power can be easily modulated by superimposing the modu
Externí odkaz:
https://doaj.org/article/40bb41ea5b1d480aa49c59ca86f7d685
Autor:
Yasuko Onuma, Kumiko Higuchi, Yasuhiko Aiki, Yujing Shu, Masahiro Asada, Makoto Asashima, Masashi Suzuki, Toru Imamura, Yuzuru Ito
Publikováno v:
PLoS ONE, Vol 10, Iss 4, p e0118931 (2015)
Fibroblast growth factors (FGFs) are essential for maintaining self-renewal in human embryonic stem cells and induced pluripotent stem cells. Recombinant basic FGF (bFGF or FGF2) is conventionally used to culture pluripotent stem cells; however, beca
Externí odkaz:
https://doaj.org/article/53ab159043174091af94ef573311394a
Publikováno v:
BioTechniques, Vol 29, Iss 5, Pp 978-981 (2000)
Externí odkaz:
https://doaj.org/article/75c9c845971b4bd3a08b820ac7c033a2
Publikováno v:
BioTechniques, Vol 27, Iss 3, Pp 576-590 (1999)
We developed a method for introducing an N-glycosylation cassette into proteins at random sites by constructing cDNAs and expressing it in mammalian cells. The protocol entails four steps: (i) generation of cDNAs that contain single, randomly-located
Externí odkaz:
https://doaj.org/article/f005c0e1e1024cc994613da005124c5b