Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Ryota Kumai"'
Autor:
Hidenori Nomura, Takuro Tomita, Ken Morita, Shigeki Matsuo, Ryota Kumai, Toshiro Isu, Shuichi Hashimoto
Publikováno v:
Applied Physics A. 105:89-94
Spontaneous nanostructure formations on roughened and smooth silicon surface by the femtosecond laser irradiation with the repetition rate of 100 kHz were systematically studied. In addition to the widely accepted so-called coarse ripple, which has t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bf5850a332d8140d8dcac63634ae1fc
https://doi.org/10.1007/s00339-011-6490-1
https://doi.org/10.1007/s00339-011-6490-1
Microscopic analysis of carbon phases induced by femtosecond laser irradiation on single-crystal SiC
Autor:
Hiroyuki Kawahara, Shuichi Hashimoto, Emi Shindou, Ryota Kumai, Akira Yoshida, Masako Kawamoto, Shigeki Matsuo, Makoto Yamaguchi, Tatsuya Okada, Takuro Tomita, Shigeru Ueno
Publikováno v:
Applied Physics A. 100:113-117
Elemental analysis of femtosecond laser-induced modified region was carried out by transmission electron microscopy and Raman spectroscopy. The relative Raman intensities of a-SiC were higher in the peripheral region of laser irradiated spot where th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b66a724cb26b3655ee4ee20ea48122cc
https://doi.org/10.1007/s00339-010-5786-x
https://doi.org/10.1007/s00339-010-5786-x
Autor:
Shuichi Hashimoto, Shigeru Ueno, Makoto Yamaguchi, Shigeki Matsuo, Toshiaki Murai, Takuro Tomita, Keita Kinoshita, Ryota Kumai
Publikováno v:
Applied Physics A. 99:23-27
Raman spectroscopy was performed to investigate microscopic structural changes associated with a ripple structure formation initiated by femtosecond laser irradiation on the surface of single-crystal silicon carbide. The amorphous phases of silicon c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc8aefae97ca27e4a750ec0e6496e7d2
https://doi.org/10.1007/s00339-010-5569-4
https://doi.org/10.1007/s00339-010-5569-4
Publikováno v:
Applied Physics A. 97:271-276
The cross-sectional profiles of ripple structures on silicon (Si), silicon carbide (SiC), and highly oriented pyrolytic graphite (HOPG) were studied by direct observation. The ripple structures were cut by an ion beam, and their cross sections were o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96c6ddcdd4b25582fa6ac5f6410853b2
https://doi.org/10.1007/s00339-009-5364-2
https://doi.org/10.1007/s00339-009-5364-2
Autor:
Tohru Suemoto, Shigeki Matsuo, Ryota Kumai, Keita Kinoshita, Makoto Nakajima, Shuichi Hashimoto, Takuro Tomita, Hirokazu Nagase
Publikováno v:
Materials Science Forum. :879-882
Femtosecond laser-induced periodic structures, so-called "ripples", were systematically studied under various incident laser wavelengths and polarization properties. The effect of the excitation wavelength on the period of ripples was investigated fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5114b62a2389e98ceb01e5f0fe5f21d
https://doi.org/10.4028/www.scientific.net/msf.600-603.879
https://doi.org/10.4028/www.scientific.net/msf.600-603.879
Autor:
Tatsuya Okada, Hiroyuki Kawahara, Shuichi Hashimoto, Ryota Kumai, Makoto Yamaguchi, Takuro Tomita, Shigeki Matsuo
Publikováno v:
Materials Science Forum. :883-886
We carried out cross-sectional transmission electron microscopy (TEM) investigation of femtosecond laser-induced ripples formed on 4H-SiC single crystal surface. Here, we paid attention to the crystal structures underlying the coarse and fine ripples
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de6040903aa15636dc2ea5db9b4fd91c
https://doi.org/10.4028/www.scientific.net/msf.600-603.883
https://doi.org/10.4028/www.scientific.net/msf.600-603.883
Cross-sectional TEM analysis of laser-induced ripple structures on the 4H–SiC single-crystal surface
Autor:
Makoto Yamaguchi, Ryota Kumai, Masako Kawamoto, Tatsuya Okada, Takuro Tomita, Y. Ishida, Shuichi Hashimoto, Shigeki Matsuo, Hiroyuki Kawahara, Yoji Makita
Publikováno v:
Applied Physics A. 92:665-668
The microstructures of femtosecond laser-induced ripples formed on a 4H–SiC single-crystal surface were studied by cross-sectional transmission electron microscopy (TEM), with particular attention on the crystal structure underlying fine and coarse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f3c2e3739f86be71da87c01a5bc220f
https://doi.org/10.1007/s00339-008-4611-2
https://doi.org/10.1007/s00339-008-4611-2