Reveal Light's Orbital Angular Momentum of Synchrotron Radiation with precision measurements

2015 Fiscal Year Final Research Report

• Project/Area Number: 26390112
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Hiroshima University
• Principal Investigator: SASAKI Shigemi 広島大学, 放射光科学研究センター, 教授 (00542284)
• Co-Investigator(Kenkyū-buntansha): KOIKE Masato 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究員 (50354973) ; IMAZONO Takashi 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究副主幹 (50370359) ; MIYAMOTO Atsushi 広島大学, 放射光科学研究センター, 助教 (90403617)
• Research Collaborator: KATOH Masahiro ; HOSAKA Masahito ; YAMAMOTO Naoto ; KONOMI Taro ; MIYAMOTO Koji ; KURODA Kenta ; BAHRDT Johannes ; McNULTY Ian
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 光渦 / 光の軌道角運動量 / 円偏光アンジュレーター / 高次光 / 干渉 / 回折

Outline of Final Research Achievements

Spiral interference patterns between two different harmonic radiations from two tandem-aligned helical undulators were observed by a scanning fiber multi-channel spectrometer and a UV-CCD camera placed at the end of beamline downstream of S1 straight section in UVSOR-III. Using these measurements, various interference patterns such as single, double, and triple spirals were observed which concur with the theoretical predictions for every mode in the right or left circular polarization. The rotation of an interference pattern by rotating a polarizer was also observed. These exotic properties of helical undulator harmonics may be utilized to develop a new research probe for materials science.

Free Research Field

ビーム物理