Bakar, Ronald
(2024)
Silicon Based Hybrid Photonic Crystal Waveguide With Defects For Directional Coupler And Ring Resonators.
Masters thesis, Perpustakaan Hamzah Sendut.
Abstract
Photonic crystals (phc) have been studied for photonic integrated circuits
whereby optical fibres are considered for modern wavelength division multiplexing
(wdm) applications. This study focuses on a phc as candidate for miniaturization of
wdm. Two-dimensional (2-d) silicon (si) rods on silicon dioxide (sio2) consisting
of directional coupler (dc) and phc ring resonator (pcrr)s are designed and
simulated using optifdtd by plane wave expansion (pwe) and finite difference time
domain (fdtd). A gap map was obtained using pwe by setting the photonic band
gap for si-on-sio2 as 0.64174 < 1/λ < 0.768518 and si-on-air as 0.657996 < 1/λ <
0.942283. The chosen wavelengths are within optical communications wavelengths of
1.31 μm < λ < 1.55 μm. Rod radius, r and lattice constant, a, are determined
respectively at 94.0 nm and 0.4 μm; r/a is 0.235. A dc is built by adding line defects,
decoupling 1.31 μm and 1.55 μm inputs. Three pcrrs are separately built with cavity
point defects as resonator. When the rod radii is 65.8 nm, 75.2 nm, and 84.6 nm
respectively, the dc demonstrated demultiplexing of 1.31 μm and 1.55 μm within
range of coupling lengths 8.4 μm <
Actions (login required)
 |
View Item |
