R. Kheradmand

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Nitride semiconductors and their alloys recently have versatile applications as high-power and high-efficiency electro optical devices duo to their high thermal stability, direct transition and wide bang-gap. Nanostructure light emitting diodes of these materials have an emission spectrum from infrared to ultraviolet. In this paper, besides simulating a(More)
Pseudo-thermal ghost imaging experiments correlate the intensity distribution of the reference arm measured by a high spatial-resolution (scanning pinhole or CCD camera) detector with total photon counts of the object arm measured by a bucket (single-pixel) detector. We review the effects of the object size and also the speckle frame numbers on the(More)
We describe two different methods that exploit the intrinsic mobility properties of cavity solitons to realize periodic motion, suitable in principle to provide soliton-based, all-optical clocking or synchronization. The first method relies on the drift of solitons in phase gradients: when the holding beam corresponds to a doughnut mode (instead of a(More)
Recently, we have introduced a numerical method for calculating local dispersion of arbitrary shaped optical waveguides, which is based on the Finite-Difference Time-domain and filter diagonalization technique. In this paper we present a study of Received 1 May 2010, Accepted 20 September 2010, Scheduled 26 September 2010 Corresponding author: J. Zarbakhsh(More)
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