Simulation and fabrication of THz waveguides with silicon wafer by using eye-shaped pillars as building blocks |
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Authors: | Email author" target="_blank">Yong?WanEmail author Zhongyu?Cai Qin?Li X?S?Zhao |
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Institution: | (1) Department of Physics and Astronomy, University of Western Ontario, London, Ontario, N6A 3K7, Canada |
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Abstract: | Silicon-based photonic crystal is a promising material for terahertz (THz) waveguide due to its high refractive index contrast.
In this work, we introduce eye-shaped pillars as the feature building blocks for two-dimensional (2D) photonic crystals. The
simulation study shows that larger TE mode band gaps (PBGs) can be created by the arrangement of dielectric eye-shaped pillars
in air. The reflective spectra demonstrate that there are complex PBGs, where the peak position and intensity can be changed
by varying the parameter e. Moreover, the peak of reflective spectra exhibits an obvious blue shift with the increase of incidence angle of light. When
the vacant space in the structure is filled by polystyrene (PS) microspheres of 2 μm in diameter, the peak intensity of reflective
spectra reduces significantly compared with that without PS microspheres, which suggests that this design can act as a sensor
in the fields of biology, agriculture or medicine. |
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Keywords: | |
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