Zobrazeno 1 - 10
of 240
pro vyhledávání: '"Hironaru Murakami"'
Publikováno v:
Sensors, Vol 24, Iss 15, p 4781 (2024)
There is an urgent need to develop non-destructive testing (NDT) methods for infrastructure facilities and residences, etc., where human lives are at stake, to prevent collapse due to aging or natural disasters such as earthquakes before they occur.
Externí odkaz:
https://doaj.org/article/a0458418d4334f0e88bdac6a21ab71ca
Publikováno v:
IEEE Access, Vol 11, Pp 84027-84034 (2023)
This study utilized a multiple-input multiple-output synthetic aperture radar (MIMO-SAR) technology employing a frequency-modulated continuous wave (FMCW) millimeter-wave MIMO radar to execute two-dimensional (2D) and three-dimensional (3D) imaging o
Externí odkaz:
https://doaj.org/article/f4982de3c4644cd1a01bed9cefc39577
Autor:
Fumikazu Murakami, Kazunori Serita, Iwao Kawayama, Hironaru Murakami, Kingshuk Bandopadhyay, Andrzej Materna, Augustine M. Urbas, Dorota A. Pawlak, Masayoshi Tonouchi
Publikováno v:
APL Materials, Vol 11, Iss 3, Pp 031102-031102-9 (2023)
Bismuth telluride (Bi2Te3)-based heterostructures have attracted considerable attention owing to their interesting anisotropic properties and expected higher thermoelectric performance. Therefore, exploring the nature of the carrier dynamics in these
Externí odkaz:
https://doaj.org/article/dc0b63c4733245a1b223b11d8aea743d
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Abstract Powerful, broadband terahertz (THz) pulses and its application attract an exponential growth of interests. Dual-color laser filamentation in gases is one of the promising THz sources because of the scalability of the THz energy and wavelengt
Externí odkaz:
https://doaj.org/article/b105f715eb064a95b238184da0498d02
Autor:
Abdul Mannan, Ryotaro Inoue, Fumikazu Murakami, Kazunori Serita, Hironaru Murakami, Masayoshi Tonouchi
Publikováno v:
AIP Advances, Vol 11, Iss 12, Pp 125021-125021-6 (2021)
We studied the phased-array effects in terahertz emission from semiconductor surfaces upon femtosecond laser illumination. A finite-difference time-domain simulation and experimental observation of the radiation patterns were utilized to examine the
Externí odkaz:
https://doaj.org/article/8ee60c695e34470daffb3c5f4cd031f6
Publikováno v:
Photonics, Vol 9, Iss 4, p 233 (2022)
Beta gallium oxide, β-Ga2O3, is one of the promising ultrawide bandgap semiconductors with a monoclinic (C2/m) β-phase structure showing strong anisotropic properties. To improve the performance of these devices, more optical characterization is re
Externí odkaz:
https://doaj.org/article/f8272534f5dc4bf9a5fd6e91a9bace2a
Autor:
Filchito Renee Bagsican, Andrew Winchester, Sujoy Ghosh, Xiang Zhang, Lulu Ma, Minjie Wang, Hironaru Murakami, Saikat Talapatra, Robert Vajtai, Pulickel M. Ajayan, Junichiro Kono, Masayoshi Tonouchi, Iwao Kawayama
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
Abstract Adsorption of gas molecules on the surface of atomically layered two-dimensional (2D) materials, including graphene and transition metal dichalcogenides, can significantly affect their electrical and optical properties. Therefore, a microsco
Externí odkaz:
https://doaj.org/article/f6007d7acdbf405f80f67aec17fff659
Autor:
Kosuke Okada, Quentin Cassar, Hironaru Murakami, Gaëtan MacGrogan, Jean-Paul Guillet, Patrick Mounaix, Masayoshi Tonouchi, Kazunori Serita
Publikováno v:
Photonics, Vol 8, Iss 5, p 151 (2021)
Terahertz-light imaging is attracting great attention as a new approach in non-invasive/non-staining biopsy of cancerous tissues. Positively, terahertz light has been shown to be sensitive to the cell density, the hydration content, and the chemical
Externí odkaz:
https://doaj.org/article/d42c60855b1f4b188eb7fbb44c545f69
Autor:
Hao Jiang, Chen Gong, Tatsuhiko Nishimura, Hironaru Murakami, Iwao Kawayama, Hidetoshi Nakanishi, Masayoshi Tonouchi
Publikováno v:
Photonics, Vol 7, Iss 3, p 73 (2020)
Although gallium oxide Ga2O3 is attracting much attention as a next-generation ultrawide bandgap semiconductor for various applications, it needs further optical characterization to support its use in higher-performance devices. In the present study,
Externí odkaz:
https://doaj.org/article/f5ddfd4636924b8ab9ac36c22539abd7
Autor:
Kazunori Serita, Eiki Matsuda, Kosuke Okada, Hironaru Murakami, Iwao Kawayama, Masayoshi Tonouchi
Publikováno v:
APL Photonics, Vol 3, Iss 5, Pp 051603-051603-10 (2018)
We present a nonlinear optical crystal (NLOC)-based terahertz (THz) microfluidic chip with a few arrays of split ring resonators (SRRs) for ultra-trace and quantitative measurements of liquid solutions. The proposed chip operates on the basis of near
Externí odkaz:
https://doaj.org/article/0fdb381f81584ccfad16bd616a7bacb7