A bi-prism interferometer for hard X-ray photons.
Micro-fabricated bi-prisms have been used to create an interference pattern from an incident hard X-ray beam, and the intensity of the pattern probed with fluorescence from a 30 nm-thick metal film. Maximum fringe visibility exceeded 0.9 owing to the nano-sized probe and the choice of single-crystal prism material. A full near-field analysis is necessary to describe the fringe field intensities, and the transverse coherence lengths were extracted at APS beamline 8-ID-I. It is also shown that the maximum number of fringes is dependent only on the complex refractive index of the prism material.
Isakovic
A F
AF
Brookhaven National Laboratory, Upton, NY 11973, USA.
Stein
A
A
Warren
J B
JB
Sandy
A R
AR
Narayanan
S
S
Sprung
M
M
Ablett
J M
JM
Siddons
D P
DP
Metzler
M
M
Evans-Lutterodt
K
K