Enhanced complete photonic bandgap in a moderate refractive index contrast chalcogenide-air system with connected-annular-rods photonic crystals
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Advanced Semiconductor Laboratory
KAUST Grant NumberBAS/1/1664-01-01
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AbstractConnected-annular-rods photonic crystals (CARPCs) in both triangular and square lattices are proposed to enhance the two-dimensional complete photonic bandgap (CPBG) for chalcogenide material systems with moderate refractive index contrast. For the typical chalcogenide-glass–air system with an index contrast of 2.8:1, the optimized square lattice CARPC exhibits a significantly larger normalized CPBG of about 13.50%, though the use of triangular lattice CARPC is unable to enhance the CPBG. It is almost twice as large as our previously reported result [IEEE J. Sel. Top. Quantum Electron. 22, 4900108 (2016) [CrossRef] ]. Moreover, the CPBG of the square-lattice CARPC could remain until an index contrast as low as 2.24:1. The result not only favors wideband CPBG applications for index contrast systems near 2.8:1, but also makes various optical applications that are dependent on CPBG possible for more widely refractive index contrast systems.
CitationHou J, Yang C, Li X, Cao Z, Chen S (2018) Enhanced complete photonic bandgap in a moderate refractive index contrast chalcogenide-air system with connected-annular-rods photonic crystals. Photonics Research 6: 282. Available: http://dx.doi.org/10.1364/prj.6.000282.
SponsorsNational Natural Science Foundation of China (NSFC) (11504435, 11147014); Natural Science Foundation of Hubei Province, China (2013CFA052); King Abdullah University of Science and Technology (KAUST) (Baseline BAS/1/1664-01-01); Fundamental Research Funds for the Central Universities, South-Central University for Nationalities, China (CZY18001).
PublisherThe Optical Society