Realization of tunable optical filter by photonic crystal ring resonators

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• 作者：Mohammad Reza Rakhshani ; Mohammad Ali Mansouri-Birj ; i
• 关键词：Filter ; Photonic crystal ; Ring resonator ; Wavelength
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：124
• 期：22
• 页码：5377-5380
• 全文大小：1500 K

文摘

We have designed a tunable two dimensional (2D) channel drop filter (CDF) based on photonic crystal ring resonators (PCRR). Dropping efficiency and Q factor of single improved ring are 100 % and 842, respectively. In this filter the quality factor is significantly improved with respect to other published reports. We investigate parameters which have an effect on resonant wavelength in this CDF, such as dielectric constant of inner, coupling, adjacent and whole rods of the structure and radius of inner rods. The transmission spectrum for our proposed configuration has been investigated using the 2D finite difference time domain (FDTD) method. The area of the proposed structure is about 117 ¦Ìm².