Authors: Sai Venkatesh Balasubramanian
A two-dimensional photonic crystal based on a lattice of silicon rods in air with a photonic bandgap in the visible and near-ultraviolet spectra is proposed, by removing some of the silicon rods or resizing their radius, to create a monotonically varying tapered line defect, thereby pertaining to a case of structure-based nonlinearity and making it possible to operate with low input powers. By properly manipulating the length of the line defect, pulse compression and consequent adiabatic amplification is seen, along with bunching/anti-bunching of pulses. For certain modes of operation, field confinement is observed, and this leads to the formation of discrete pulses, or light bullets. Following this, by appropriate use of cavity defects, the localization of discrete pulses is obtained, with the ‘gate’-output transfer curve resembling optical bistability. Such a structure can be used as a multi-functional device, with some of the functionalities being optical non-pumped amplification, frequency upconversion, memory writing, matched termination and slow wave guiding, that form the major conclusions of the work.
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[v1] 2015-10-28 09:29:42
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