Predicted photonic band gaps in diamond-lattice crystals built from silicon truncated tetrahedrons

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Woldering, Léon A. and Abelmann, Leon and Elwenspoek, Miko C. (2011) Predicted photonic band gaps in diamond-lattice crystals built from silicon truncated tetrahedrons. Journal of Applied Physics, 110 (4). 043107-043114. ISSN 0021-8979

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Abstract:Recently, a silicon micromachining method to produce tetrahedral silicon particles was discovered. In this report we determine, using band structure calculations, the optical properties of diamond-lattice photonic crystals when assembled from such particles. We show that crystal structures built from silicon tetrahedra are expected to display small stop gaps. Wide photonic band gaps appear when truncated tetrahedral particles are used to build the photonic crystals. With truncated tetrahedral particles, a bandgap with a width of 23.6% can be achieved, which is more than twice as wide compared to band gaps in self-assembled diamond-lattices of hard-spheres. The width of the bandgap is insensitive to small deviations from the optimal amount of truncation. This work paves the way to a novel class of silicon diamond-lattice bandgap crystals that can be obtained through self-assembly. Such a self-assembly approach would allow for easy integration of these highly photonic crystals in existing silicon microfluidic and -electronic systems.
Item Type:Article
Copyright:© 2011 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/78051
Official URL:http://dx.doi.org/10.1063/1.3624604
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