Abstract
Characteristics of two different multichannel wavelength division multiplexing (WDM) systems composed of two-dimensional (2D) hetero photonic crystals (HPCs) are introduced. One utilizes five photonic crystal (PC) units, each fabricated with triangular and rectangular lattice. The other consists of five PC units in rectangular lattice. Both systems have a lattice constant difference of 4nm between adjacent PC units, and both systems apply silicon rods with a radius of 120nm. Finite-difference time-domain (FDTD) method and plan wave expansion (PWE) method reveal the ability of wavelength spacing ∼8nm with high quality factor (Q) in a system based on triangular and rectangular lattice; and ∼8nm with almost constant transmission efficiency based on rectangular lattice.
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