Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Shohei Kamada"'
Publikováno v:
The Proceedings of the Materials and Mechanics Conference. 2018:OS0608
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7faa316deaa11866e966be6a231f5038
https://doi.org/10.1299/jsmemm.2018.os0608
https://doi.org/10.1299/jsmemm.2018.os0608
Publikováno v:
Optics express. 22(19)
We study the elimination of the chirp of narrowband terahertz pulses generated by chirped laser pulse beating using a laser pulse stretcher with two grating pairs that cancel out the third-order spectral phase. First, we show that positively chirped
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17d1bb67707bb5a95e423b283a7fb4a9
https://pubmed.ncbi.nlm.nih.gov/25321834
https://pubmed.ncbi.nlm.nih.gov/25321834
Publikováno v:
Proceedings of the 12th Asia Pacific Physics Conference (APPC12).
Suppression of the chirp of terahertz (THz) pulses by using a single-mode optical fiber as a pulse stretcher is investigated.We theoretically show that the chirp obtained with fiber-based pulse stretcher can be suppressed below the fundamental limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95e75065a89786fcc4bcc69e4ed5fec9
https://doi.org/10.7566/jpscp.1.014027
https://doi.org/10.7566/jpscp.1.014027
Publikováno v:
Proceedings of the 12th Asia Pacific Physics Conference (APPC12).
Chirped laser pulses are widely used in coherent control of various quantum systems. In order to apply such techniques to terahertz (THz) frequencies, it is desirable to develop a method to generate THz pulses with controlled linear chirp. Difference
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07d885aa904eeb0e025290414070c621
https://doi.org/10.7566/jpscp.1.014022
https://doi.org/10.7566/jpscp.1.014022
Autor:
Shotaro Takeuchi, D.T. Khan, Akira Sakai, Hideto Miyake, Kazumasa Hiramatsu, Shigeru Kimura, Shohei Kamada, Yasuhiko Imai
Publikováno v:
Applied Physics Express. 9:111001
Three-dimensional (3D) lattice plane microstructures were investigated at local regions in an epitaxial AlN thick film grown on a trench-patterned AlN/sapphire template. A 3D reciprocal lattice space mapping technique combined with cross-sectional X-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bac4d955336ce8ec97c46fc0de3f5999
https://doi.org/10.7567/apex.9.111001
https://doi.org/10.7567/apex.9.111001
Autor:
Takuji Arauchi, Yasuhiro Hashimoto, Shigeru Kimura, Narihito Okada, Shotaro Takeuchi, Akira Sakai, Toshiro Uchiyama, Yasuhiko Imai, Keisuke Yamane, Shohei Kamada, Kazuyuki Tadatomo
Publikováno v:
Japanese Journal of Applied Physics. 55:05FA07
We have investigated the position dependence of crystalline quality and defect distribution in a semipolar hydride vapor phase epitaxy (HVPE)-GaN film grown on a patterned sapphire substrate (PSS). Position-dependent X-ray microdiffraction (XRMD) mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f11d8eaad73191dbb61db135df3eb2d
https://doi.org/10.7567/jjap.55.05fa07
https://doi.org/10.7567/jjap.55.05fa07
Publikováno v:
The Proceedings of the Materials and Mechanics Conference. 2016:GS-46
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88e1396a1888b598ff5f7b1d65212ffa
https://doi.org/10.1299/jsmemm.2016.gs-46
https://doi.org/10.1299/jsmemm.2016.gs-46
Publikováno v:
Applied Physics Letters. 104:101102
We demonstrate a method for controlling the chirp of the frequency-tunable narrowband terahertz pulses that are generated by photomixing with nonlinearly chirped laser pulse pairs. We find that in a grating-based laser-pulse stretcher, the frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b24ad0c74f3865c6b5724a13f9f3ae5
https://doi.org/10.1063/1.4867983
https://doi.org/10.1063/1.4867983
Publikováno v:
Applied Physics Express. 7:029202
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d440e8f13ac2c36b677abbde4c3d41d
https://doi.org/10.7567/apex.7.029202
https://doi.org/10.7567/apex.7.029202
Publikováno v:
Applied Physics Letters. 103:151118
We theoretically show that it is possible to generate chirp-free terahertz (THz) pulses with a chirped-pulse beating method by using an optical fiber as a pulse stretcher. Proper choices of the core radius and the dopant fraction of the core material
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13f1e9cc6c12e4e931c72c95729ad0d6
https://doi.org/10.1063/1.4824882
https://doi.org/10.1063/1.4824882