منابع مشابه
Dynamic Diffracting Trees
by Giovanni M. Della-Libera S.B. Mathematics, S.B. Computer Science, Massachusetts Institute of Technology (1996) Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements for the degree of Master of Engineering in Electrical Engineering and Computer Science at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY July 1996 @ Massachusetts Institu...
متن کاملReconstructive tomography with diffracting wavefieldst
A unified theoretical framework based on the scalar wave equation is presented for transmission tomography of weakly inhomogeneous objects embedded in a known uniform background medium. The developed formulation differs from the usual treatments of diffraction tomography in that it is not limited to applications employing plane-wave illumination and planar measurement boundaries and can be exte...
متن کاملPolarization quadrature measurement of subwavelength diffracting structures.
The amplitude and the phase of the diffracted far field depends on polarization when the diffracting structure is comparable to or less than the wavelength. When the far-field amplitude and the phase of one polarization with respect to the orthogonal polarization is measured, small changes in the structure can be measured. To make the far-field polarization measurements, we design a detector th...
متن کاملReproducible growth of well diffracting ribosomal crystals.
The crystallization of ribosomal particles is associated with extraordinary challenging demands. This originates mainly from the ribosome's natural tendency to deteriorate and from its multi-conformational heterogeneity, both of which stem from its functional flexibility. To increase the level of homogeneity of ribosomal preparations, systematic searches for conditions yielding populations of f...
متن کاملNegative refraction can make non-diffracting beams.
We report the results of simulations relating to the illumination of a structure consisting of a slab constructed from a 2-D hexagonal array of metal rods with a terahertz frequency source. As a consequence of negative refraction an essentially non-divergent beam pattern is observed. Although the results presented relate to the terahertz regime they should also be applicable at other frequencies.
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ژورنال
عنوان ژورنال: Nature Chemistry
سال: 2008
ISSN: 1755-4330,1755-4349
DOI: 10.1038/nchem.50