Papers by Tsuneaki Miyahara
Meeting Abstracts of the Physical Society of Japan, 2018
Solid State Communications, 1992
ABSTRACT
Solid State Communications, 1984
Evidence of reduction of the Fermi edge singularity is shown for Na 2p absorption edge in K-Na al... more Evidence of reduction of the Fermi edge singularity is shown for Na 2p absorption edge in K-Na alloys. The result is contrary to the interpretation presented by Gibbs et al. [3]. A tentative explanation is given which does not contradict Mahan-Nazieres-DeDominics theory.
Review of Scientific Instruments, 1992
A branch beamline, BL28A, has been constructed for the application of circularly polarized vacuum... more A branch beamline, BL28A, has been constructed for the application of circularly polarized vacuum ultraviolet radiation. The radiation can be obtained in the helical undulator operation mode of an insertion device, EMPW♯28, which is also cut for elliptically polarized hard x‐ray radiation. T first harmonic of the helical undulator radiation can be tuned from 40 to 350 eV with its corresponding K value from 3 to 0.2. A monochromator working basically with constant deviation optics was installed, and has started its operation. A circularly polarized flux of ∼1010 photons/s has been achieved with energy resolution of around 500–1000 at the first harmonic peak. The circular polarization after the monochromator was estimated to be higher than 70% by comparing theory and experiment on the magnetic circular dichroism of nickel films in the 3p‐3d excitation region. The design philosophy of the beamline and recent results on the performance tests are presented.
Extended Abstracts of the 1988 International Conference on Solid State Devices and Materials, 1988
To fabricate devices such as Josephson Junction devices using recently developed high Tc supercon... more To fabricate devices such as Josephson Junction devices using recently developed high Tc superconducting materials, interface characteristics between contact metals or junction materials and superconductors trere analyzed with synchrotron radiation photoemission spectroscopy. A netl surface processing technique consisting of 0* ion sputtering and in situ Au deposition processes on YBazCusOv l.tas developed to realize very low contact resistance based on these SRPES experiments.
Optics express, Jan 25, 2016
We present experimental results on the observation of a bulk second-order nonlinear susceptibilit... more We present experimental results on the observation of a bulk second-order nonlinear susceptibility, derived from both free-space and integrated measurements, in silicon nitride. Phase-matching is achieved through dispersion engineering of the waveguide cross-section, independently revealing multiple components of the nonlinear susceptibility, namely χ<sup>(2)</sup> <sub>yyy</sub> = 0.14 ± 0.08 pm/V and χ<sup>(2)</sup> <sub>xxy</sub> = 0.30 ± 0.18 pm/V. Additionally, we show how the second-harmonic signal may be tuned through the application of bias voltages across silicon nitride. The material properties measured here are anticipated to allow for the realization of new nanophotonic devices in CMOS-compatible silicon nitride waveguides, adding to their viability for telecommunication, data communication, and optical signal processing applications.
Review of Scientific Instruments, 1989
ABSTRACT
Journal of the Physical Society of Japan, 1979
Hiroyoshi ISHII*, Yuji NAKAYAMA, Shinichiro FUJIKI, Yasuharu HIRADO, Hidetsugu SHIOZAWA, Tsuneaki... more Hiroyoshi ISHII*, Yuji NAKAYAMA, Shinichiro FUJIKI, Yasuharu HIRADO, Hidetsugu SHIOZAWA, Tsuneaki MIYAHARA, Yutaka MANIWA, Takeshi KODAMA, Yohji ACHIBA, Hiromichi KATAURA, Masashi NAKATAKE and Tomohiko SAITOH Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan HiSOR, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
Meeting Abstracts of the Physical Society of Japan (Nihon Butsuri Gakkai koen gaiyoshu), 2005
Introduction The non-linear (NL) effect in the x-ray region is a promising study to explore a new... more Introduction The non-linear (NL) effect in the x-ray region is a promising study to explore a new science utilizing the intense x-ray such as the FEL. Some attempts in observing the NL effect with the SR has been performed in the hard x-ray region [1]. However, the NL effects in the soft x-ray region have not been observed, and it is important to establish the technique to observe the NL effect for future earnest experiments. For this purpose, we have developed a new apparatus in observing the secondharmonic generation in the soft x-ray region.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Figure 1: Photoemission spectra of the C 60 peapod and SWNT samples, and C 60 fullerenes in SWNTs.
Physical Review B, 1989
ABSTRACT
Physical Review B, 1990
... 72, 419 (1989) [INSPEC][CAS]. LI Johansson, PM Stefan, ML Shek and AN Christensen, Phys. Rev.... more ... 72, 419 (1989) [INSPEC][CAS]. LI Johansson, PM Stefan, ML Shek and AN Christensen, Phys. Rev. B 22, 1032 (1980), and references therein [CAS]. ... Rev. B 22, 4921 (1980) [CAS]. LI Johansson, A. Callenås, PM Stefan, AN Christensen and K. Schwarz, Phys. Rev. ...
Review of Scientific Instruments, 1995
... combined with a low emittance source, we have introduced a grating monochro-mator and constru... more ... combined with a low emittance source, we have introduced a grating monochro-mator and constructed a microscope at the beamline NElB of the TRISTAN AR in KEK ... t J. Kirz, in X-Ray Microscopy III, edited by A. Michette, G. Morrison, and C. Buckley (Springer, Berlin, 1992), pp. ...
Journal of the Physical Society of Japan, 1987
Journal of the Physical Society of Japan Vol. 56, No. 10, October, 1987, pp. 3689-3694 Near-Norma... more Journal of the Physical Society of Japan Vol. 56, No. 10, October, 1987, pp. 3689-3694 Near-Normal Reflectance Spectra of Ce02 and Ce^Lai_xAl2 System Tsuneaki Miyahara, Atsushi Fujimori,1 Tsuneharu Koide, Shigeru Sato, Shik Shin,1&amp;#x27;1&amp;#x27; Mareo Ishigame,1&amp;quot;1&amp;quot; ...
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Papers by Tsuneaki Miyahara