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A novel algorithm for fast computation of tomographic image projections is presented. The method comprises a decomposition of an image into subimages followed by an aggregation of projections computed for the subimages. The multilevel domain decomposition algorithm is formulated as a recursive procedure. The computational cost of the proposed algorithm is… (More)

- Shaojing Li, Ruinan Chang, Amir Boag, Vitaliy Lomakin
- 2012

A survey of electromagnetic integral-equation solvers, implemented on graphics processing units (GPUs), is presented. Several key points for effi cient GPU implementations of integral-equation solvers are outlined. Three spatial-interpolation-based algorithms, including the Nonuniform-Grid Interpolation Method (NGIM), the box Adaptive-Integral Method… (More)

A novel algorithm to rapidly compute transient wave fields radiated by three-dimensional temporally band-limited source constellations is proposed. Just like its two-level predecessor, the Multilevel Cartesian Non-uniform Grid Time Domain (ML_CNGTD) algorithm leverages the observation that transient wave fields generated by temporally band-limited and… (More)

We derive an exact spectral representation for the Green's function of Maxwell equations in a two-dimensional homogeneous and rotating environment. The formulation is developed in the medium (noninertial) rest frame, and it represents the response to a point source, where both the source and observation points rotate together with the medium. The closed… (More)

- Ben Zion Steinberg, Amir Boag, Ronen Lisitsin
- Journal of the Optical Society of America. A…
- 2003

Photonic crystal microcavities, formed by local defects within an otherwise perfectly periodic structure, can be used as narrowband optical resonators and filters. The coupled-cavity waveguide (CCW) is a linear array of equally spaced identical microcavities. Tunneling of light between microcavities forms a guiding effect, with a central frequency and… (More)

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