Study of Two-Dimensional Photonic Crystal Microcavities as a Function of Refractive Index
R. Moukhtari, A. Hocini and D. Khedrouche
Laboratoire d'Analyse des Signaux et Systèmes, Department of Electronics, Mohamed Boudiaf University of M'sila, B.P. 166, Route Ichebilia, M'sila, 28000 Algeria
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Quality factor of two-dimensional photonic crystals microcavity fabricated by SiO2/ZrO2 or SiO2/TiO2 in which the refractive index varied in the range of 1.51 to 1.58 has been investigated in the present paper. The structure studied consists of circular rods of radius r embedded in air slab, while a is the constant of triangular lattice. Finite difference time domain method with perfectly matched layers was used to calculate the transmission spectrum by FullWAVE software. The results of simulation clearly demonstrate the existences of resonance wavelength of which the position and the highest Q (Q ≈ 4×105) value are strongly affected by refractive index. We demonstrate that the calculated Q factor for the designed cavity increases by a factor of three relative for a cavity without increasing the refractive index.

DOI: 10.12693/APhysPolA.129.556
PACS numbers: 42.70.Qs, 04.30.Nk, 41.20.Jb, 42.82.-m