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Effect of Lattice Constant and Air Hole Diameter on the Mode Profile in Triangular and Square Lattice Photonic Crystal Fiber at THz Regime

A photonic crystal fiber (PCF) presents a new way to guide light. The air holes in the fiber work as a cladding, but provide much more flexibility in the design. In this paper the mode profile in square and triangular lattice Phonic Crystal Fiber (PCF) is investigated for different lattice constant and air hole diameter of PCF using a 3D Mode Solver. The effect of variation in lattice constant and air hole diameter on the mode profile is analyzed and good optical confinement with increasing air filling faction at THz regime is obtained.