Effects of Punctual Defects on the Optical Properties

of the One-Dimensional Photonic Crystals

 

A. Mouldi*, M. Kanzari

Laboratoire de Photovoltaïque et Matériaux  Semi-conducteurs. (LPMS)

Ecole Nationale d’Ingénieurs de Tunis BP 37 Belvédère  1002 Tunis, Tunisie.

* Corresponding author. E-mail: abir20052002@yahoo.fr

Received: 17 March 2008; revised version accepted: 27 October 2008

 

Abstract

     The introducing of defects in photonic crystal opens up new perspectives in optical domain. This work aims to study effects caused by punctual defects on one-dimensional periodic system H(LH)15 where H and L are respectively dielectric layers of  High and Low refractive indices. The study is conducted on TiO2(H)/SiO2(L) system. Defects considered are intrinsic (substitution defect, vacancy defect) or extrinsic (replacement of one or several system layers by one or several foreign layers). It is showed that this type of defects is interesting to appreciate their effects on unidirectional dielectric mirror performances. The perfect system without defects is taken as reference. This work of simulation presents a great advantage since we are capable of predicting in advance the impact of any type of defect on optical devices performances.

 

Keywords: Photonic crystals; Point defect; Band Gap sensitivity; Transmission peak.


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