title: X-ray resonance in crystal cavities: realization of Fabry-Perot resonator for hard x rays.
abstract: X-ray back diffraction from monolithic two silicon crystal plates of 25-150 microm thickness and a 40-150 microm gap using synchrotron radiation of energy resolution DeltaE = 0.36 meV at 14.4388 keV clearly show resonance fringes inside the energy gap and the total-reflection range for the (12 4 0) reflection. This cavity resonance results from the coherent interaction between the x-ray wave fields generated by the two plates with a gap smaller than the x-ray coherence length. This finding opens up new opportunities for high-resolution and phase-contrast x-ray studies, and may lead to new developments in x-ray optics.
authors.affiliation: Department of Physics, National Tsing Hua University (NTHU), Hsinchu, Taiwan 300, Republic of China. slchang@phys.nthu.edu.tw
authors.forename: S-L
authors.initials: SL
authors.lastname: Chang
authors.forename: Yu P
authors.initials: YP
authors.lastname: Stetsko
authors.forename: M-T
authors.initials: MT
authors.lastname: Tang
authors.forename: Y-R
authors.initials: YR
authors.lastname: Lee
authors.forename: W-H
authors.initials: WH
authors.lastname: Sun
authors.forename: M
authors.initials: M
authors.lastname: Yabashi
authors.forename: T
authors.initials: T
authors.lastname: Ishikawa