研究者詳細 - 齋藤　晃

論文 - 齋藤　晃

分割表示 84 件中 41 - 60 件目／全件表示 >>

The Boersch effect in a picosecond pulsed electron beam emitted from a semiconductor photocathode 査読有り

M. Kuwahara, Y. Nambo, K. Aoki, K. Sameshima, X. Jin, T. Ujihara, H. Asano, K. Saitoh, Y. Takeda, and N. Tanaka

Applied Physics Letters 109 巻頁： 013108 2016年

Strain evolution of epitaxial tetragonal-like BiFeO3 thin films on LaAlO3(001) substrates prepared by sputtering and their bulk photovoltaic effect 査読有り

S. Nakashima, T. Uchida, K. Doi, K. Saitoh, H. Fujisawa, O. Sakata, Y. Katsuya, N. Tanaka, and M. Shimizu

Japanese Journal of Applied Physics 55 巻頁： 101501 2016年

Electron Diffractive imaging using Fork-Shaped Grating Masks 査読有り

H. Nambu, K. Saitoh, M. Uchida

AMTC Letters 5 巻頁： 248-249 2016年

In situ Observation of Interfaces between Metal Electrode and Solid Oxide Electrolyte Prepared by FIB 査読有り

T. Ishida, T. Tanji, M. Tomita, K, Higuchi, K. Saitoh

AMTC Letters 5 巻頁： 62-63 2016年

Measuring the Orbital Angular Momentum of Electron Vortex Beams Using a Forked Grating 査読有り

K. Saitoh, Y. Hasegawa, K. Hirakawa, N. Tanaka, and M. Uchida

Physical Review Letters 111 巻頁： 074801 2013年8月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The present study experimentally examines how an electron vortex beam with orbital angular momentum (OAM) undergoes diffraction through a forked grating. The nth-order diffracted electron vortex beam after passing through a forked grating with a Burgers vector of 1 shows an OAM transfer of n@. Hence, the diffraction patterns become mirror asymmetric owing to the size difference between the electron beams. Such a forked grating, when used in combination with a pinhole located at the diffraction plane, could act as an analyzer to measure the OAM of input electrons.

DOI： 10.1103/PhysRevLett.111.074801

Propagation Dynamics of Electron Vortex Pairs 査読有り

Y. Hasegawa, K. Saitoh, N. Tanaka, and M. Uchida

Journal of the Physical Society of Japan 82 巻頁： 073402 2013年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Electron vortex beams carrying orbital angular momentum have been experimentally realized very recently. Here, we present the generation and propagation dynamics of electron vortex pairs embedded in a single beam, using a nanofabricated holographic grating. The rotation of two electron vortices with the same topological charges and the annihilation of two electron vortices with opposite charges were observed. The experimental results are well explained by the Gouy phase shift and confirmed by numerical simulations of the propagation. The results of this study may help develop an intuitive understanding of electron vortex motion and give a new viewpoint for analyzing electron microscope images and phase change in a crystal.

DOI： 10.7566/JPSJ.82.073402

らせん状の波面をもつ電子波の生成、伝播、干渉招待有り査読有り

齋藤晃、長谷川裕也、内田正哉

顕微鏡 48 巻 ( 1 ) 頁： 39-46 2013年4月

Young's Interference Experiment with Electron Beams Carrying Orbital Angular Momentum 査読有り

Y. Hasegawa, K. Saitoh, N. Tanaka, S. Tanimura and M. Uchida

Journal of the Physical Society of Japan 82 巻頁： 033002 2013年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

A Young's-type double-slit experiment using electron beams carrying orbital angular momentum (OAM) is demonstrated in a transmission electron microscope. Each of the slits is replaced by a grating mask with a fork dislocation, which generates electron beams with OAM as diðracted beams. Interference fringes produced by two diðracted electron beams with OAM appear at the observation screen. The interference fringe patterns exhibit dislocation features depending on the topological charges of the two electron beams. The experimental results clearly show the wave nature of the electron beams with OAM and gives potential applications in electron physics and quantum mechanics.

DOI： 10.7566/JPSJ.82.033002

HOLZ線図形をもちいたSiGe/Si界面近傍の格子湾曲および伸張歪みの解析招待有り査読有り

齋藤晃

まてりあ 51 巻 ( 8 ) 頁： 371-378 2012年

30-kV spin-polarized transmission electron microscope with GaAs-GaAsP strained superlattice photocathode 査読有り

M. Kuwahara, S. Kusunoki, X. G. Jin, T. Nakanishi, Y. Takeda, K. Saitoh, T. Ujihara, H. Asano, and N. Tanaka

101 巻 ( 3 ) 頁： 033102 2012年

Electron interference from an amorphous thin film on a crystal transmission electron microscopy specimen 査読有り

Rodney A. Herring, Koh Saitoh, Takayoshi Tanji, and Nobuo Tanaka

Journal of Electron Microscopy 61 巻頁： 17-23 2012年

Production of electron vortex beams carrying large orbital angular momentum using spiral zone plates 査読有り

Koh Saitoh, Yuya Hasegawa, Nobuo Tanaka, and Masaya Uchida

Journal of Electron Microscopy 61 巻 ( 3 ) 頁： 171-177 2012年

Analysis of thickness modulation in GaAs/GaAsP strained superlattice by TEM observation 招待有り査読有り

Xiuguang Jin, Hirotaka Nakahara, Koh Saitoh, Takashi Saka, Toru Ujihara, Nobuo Tanaka, Yoshikazu Takeda

Journal of Crystal Growth 353 巻頁： 84-87 2012年

内殻励起をともなう非弾性散乱をもちいた電子構造異方性解析招待有り査読有り

齋藤晃

顕微鏡 47 巻 ( 4 ) 頁： 228-237 2012年

Observation of the hole state symmetry of MgB2 by inelastic scattering of fast electrons accompanied by boron K-shell excitation 査読有り

K. Saitoh, K. Momonoi, N. Tanaka, and S. Onari

Journal of Applied Physics 112 巻頁： 113920 2012年

Three-dimensional reconstruction of the atomic arrangement of icosahedral quasicrystals by binary discrete tomography 査読有り

Y. Ishibashi, H. Sugiura, K. Saitoh, and N. Tanaka

Philosophical Magazine Letters 91 巻 ( 9 ) 頁： 632-639 2011年

Automated characterization of bending and expansion of a lattice of a Si substrate near a SiGe/Si interface by using split HOLZ line patterns 査読有り

K. Saitoh, Y. Yasuda, M. Hamabe and N. Tanaka

J. Electron Microsc. 59 巻頁： 367-378 2010年10月

Coherent electron interference from amorphous TEM specimens 査読有り

R. A. Herring, K. Saitoh, N. Tanaka and T. Tanji

J. Electron Microsc. 59 巻頁： 321-330 2010年10月

Atom-column distinction by Kikuchi pattern observed by an aberration-corrected convergent electron probe 査読有り

K. Saitoh, Y. Tatara and N. Tanaka

J. Electron Microsc. 59 巻頁： 387-394 2010年10月

Factors Affecting Extreme Ultraviolet Reflectivity of Mo/Si Multilayer FilmsSynthesized by Superconducting Magnetron Sputtering 査読有り

Uichiro Mizutani, Takashi Yamaguchi, Tetsuya Tomofuji, Yousuke Yanagi,Yoshitaka Itoh, Koh Saitoh, Nobuo Tanaka, Noriaki Matsunami, and Hiroshi Ikuta

Japanese Journal of Applied Physics 48 巻頁： 025507-1-6 2009年2月

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