title: High-Resolution Imaging by Fourier Transform X-ray Holography.
abstract: Fourier transform x-ray holography has been used to image gold test objects with submicrometer structure, resolving features as small as 60 nanometers. The hologram-recording instrument uses coherent 3.4-nanometer radiation from the soft x-ray undulator beamline X1A at the National Synchrotron Light Source. The specimen to be imaged is placed near the first-order focal spot produced by a Fresnel zone plate; the other orders, chiefly the zeroth, illuminate the specimen. The wave scattered by the specimen interferes with the spherical reference wave from the focal spot, forming a hologram with fringes of low spatial frequency. The hologram is recorded in digital form by a charge-coupled device camera, and the specimen image is obtained by numerical reconstruction.
authors.forename: I
authors.initials: I
authors.lastname: McNulty
authors.forename: J
authors.initials: J
authors.lastname: Kirz
authors.forename: C
authors.initials: C
authors.lastname: Jacobsen
authors.forename: E H
authors.initials: EH
authors.lastname: Anderson
authors.forename: M R
authors.initials: MR
authors.lastname: Howells
authors.forename: D P
authors.initials: DP
authors.lastname: Kern