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Title: Coherent amplification of X-ray scattering from meso-structures

Small-angle X-ray scattering (SAXS) often includes an unwanted background, which increases the required measurement time to resolve the sample structure. This is undesirable in all experiments, and may make measurement of dynamic or radiation-sensitive samples impossible. Here, we demonstrate a new technique, applicable when the scattering signal is background-dominated, which reduces the requisite exposure time. Our method consists of exploiting coherent interference between a sample with a designed strongly scattering `amplifier'. A modified angular correlation function is used to extract the symmetry of the interference term; that is, the scattering arising from the interference between the amplifier and the sample. This enables reconstruction of the sample's symmetry, despite the sample scattering itself being well below the intensity of background scattering. Thus, coherent amplification is used to generate a strong scattering term (well above background), from which sample scattering is inferred. We validate this method using lithographically defined test samples.
ORCiD logo [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials; Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering. Dept. of Applied Physics and Applied Mathematics
Publication Date:
Report Number(s):
Journal ID: ISSN 2052-2525; KC0403020
Grant/Contract Number:
Published Article
Journal Name:
Additional Journal Information:
Journal Volume: 4; Journal Issue: 5; Journal ID: ISSN 2052-2525
International Union of Crystallography
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
77 NANOSCIENCE AND NANOTECHNOLOGY; coherent amplification; small-angle X-ray scattering; meso-structures
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1407470