Mr. Mohmmad Reza Safaeian successfully defended his Master’s thesis titled “Design, Optimization, and Analysis of a Beam Steering Based Bio-Sensor” with excellent grade.
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Mr. Omid Abed successfully defended his master’s thesis, Congrats to Omid!
Mr. Omid Abed successfully defended his Master’s thesis titled “Realization of Optical Beam Steering for integrated Lidars” with excellent grade.
Dr. Yousefi was elevated to Associate Professor.
Dr. Yousefi was elevated to the grade of IEEE Senior Member.
Our paper on “ Solar Antennas : SOLANTs” was accepted for publication in IEEE Journal on Emerging and Selected Topics in Circuits and Systems.
Abstract:
A fast analytical method for calculating the radiation pattern of solar antennas (SOLANTs) consisting of metasurface-based solar cells is proposed. The proposed method is able to analyse both uniform and non-uniform metasurfaces. In the developed method, the reciprocity theorem along with the transmission line model is used to model the layered structure used in the design of SOLANTs. To model the printed antenna, the cavity model is modified to include the loading effect of solar cells on the antenna. The proposed method is used to analyse three different SOLANTs operating at different frequency regimes, and the results are verified through comparison with full wave numerical results. The proposed model can be used for optimization purposes with the goal of achieving the best possible configurations for SOLANT structures.
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Our team won the challenge of “Brain Stimulation”.
Our team won the challenge of “Brain Stimulation”.
Congrats to Pooria Salami, Hamid Akbari, and Ali Eghrari!
Mr. Amin Monemian successfully defended his PhD Thesis Proposal. Congrats to Amin.
Our paper on “Far-field imaging beyond the diffraction limit using waves interference” was accepted for publication in IEEE Journal of Light Wave Technology.
Abstract:
Due to the wave nature of light, resolution of optical imaging systems is limited to approximately half of the wavelength. The reason behind this limitation, known as diffraction limit, is the loss of information contained in evanescent waves at the far-field region. Here, we propose a new method to retrieve the information contained in evanescent waves in far field region resulting in a novel sub-wavelength imaging technique which can go beyond the diffraction limit. We theoretically prove that using interference of waves, between the target field and reference and reconstruction waves, one can apply a shift to the angular spectrum of the target field and convert a range of evanescent waves into propagating modes. Moreover, we demonstrate how these converted waves can be distinguished in far-field from other existing modes. Unlike previously developed sub-wavelength imaging techniques, the proposed method does not require neither fluorescent materials nor complex nano-structures to realize evanescent-to-propagating wave conversion. The performance of the method is numerically investigated illustrating a resolution of one-seventh of the working wavelength, which is much beyond the diffraction limit. The proposed technique can significantly simplify sub-wavelength imaging paving the road to develop practical low cost superresolution imaging systems.
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