Abstract
Effects of lateral coupling between the cavity and waveguides in two-dimensional photonic-crystal (2D PC) structures are investigated using a finite-difference time-domain (FDTD) technique. The coupling effect depends strongly on the parameters of geometry of the PC lattice, especially on the hole sizes. Two-dimensional FDTD calculations allow us to design a waveguide that presents a transmitted band between 1240 and 1610 nm with a power coefficient of 90%. In order to obtain a selective-wavelength filter compatible with the optical telecom wavelength, the waveguide is combined with a PC microcavity. The results show the extraction of the 1550 nm wavelength with a 70% power of the maximum injected power.
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