Document Type : Research
Authors
1 Photonics and Quantum Technologies Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran,Iran
2 2. Assistant Prof., Photonics and Quantum Technologies Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran
Abstract
In this research, the photonic structure of an inverse linear tapered waveguide made of silicon nitride is investigated. This structure serves as a connector between a few micron-sized waveguides and sub-micrometer waveguides in photonic integrated circuits. Since the propagation of electromagnetic modes in the structure of waveguides, especially in tapered waveguides, depends on the shape, dimensions, and material of the waveguide, the investigations of various aspects of the mentioned geometric structure are analyzed. The distribution of electromagnetic field for guided modes in this structure is also studied. Considering the importance of the transmission spectrum of a waveguide for the design of integrated photonic circuits, this will be simulated using the 3D finite-difference time-domain (FDTD) method. Among the selected single-mode structures, an optimized structure with improved efficiency is obtained. This structure has a length of 100 μm, an output width of 1 μm, and an input width of 0.3 μm.
Keywords
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