Numerical study of grating-assisted optical diffraction tomography
- Institut Fresnel (UMR 6133), Universite d'Aix-Marseille I and III, Avenue Escadrille Normandie-Niemen, F-13397 Marseille Cedex 20 (France)
We study the resolution of an optical diffraction tomography system in which the objects are either in an homogeneous background or deposited onto a glass prism, a prism surmounted by a thin metallic film or a prism surmounted by a metallic film covered by a periodically nanostructured dielectric layer. For all these configurations, we present an inversion procedure that yields the map of the relative permittivity of the objects from their diffracted far field. When multiple scattering can be neglected, we show that the homogeneous, prism, and metallic film configurations yield a resolution about {lambda}/4 while the grating substrate yields a resolution better than {lambda}/10. When Born approximation fails, we point out that it is possible to neglect the coupling between the object and the substrate and account solely for the multiple scattering within the objects to obtain a satisfactory reconstruction. Last, we present the robustness of our inversion procedure to noise.
- OSTI ID:
- 21011310
- Journal Information:
- Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.013814; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORN APPROXIMATION
CONFIGURATION
COUPLING
DIELECTRIC MATERIALS
DIFFRACTION
DIFFRACTION GRATINGS
GRATINGS
IMAGE PROCESSING
MULTIPLE SCATTERING
NANOSTRUCTURES
NOISE
NUMERICAL ANALYSIS
PERIODICITY
PERMITTIVITY
PRISMS
RESOLUTION
SUBSTRATES
THIN FILMS
TOMOGRAPHY