Jihene ZAGHDOUDI, Mounir KANZARI^*, and Bahri REZIG

Laboratoire de Photovoltaïque et Matériaux Semiconducteurs (LPMS), Ecole Nationale d'Ingénieurs de Tunis, Département Génie Industriel, BP 37, Belvédère, 1002 Tunis, Tunisie

(Received July 3, 2006; Accepted October 27, 2006)

We describe in this paper a design procedure for omnidirectional high reflectors with wide bandwidths for optical telecommunication bands. From the numerical results achieved by the transfer matrix method, it is found that a partial omnidirectional high-reflector covering the optical telecommunication wavelengths 1.3 and 1.55 μm is obtained for a partially deformed quarter-wave stack air/H(LH)¹⁵/glass by using the tellurium as a material of high refractive index (n_H=4.6). The partially deformed stack is a periodic system deformed by a power law y=x^1+k. Here y is the coordinates of the deformed object, x is the coordinates of the periodic stack and k is the coefficient defining the deformation degree. The study of this system leads to an omnidirectional high reflector band covering the optical telecommunication wavelengths 1.3 and 1.55 μm for k=0.2.

Key words: multilayer, superlattices, telecommunication, omnidirectional, band-gap

^*Corresponding author. E-mail address: mounir.kanzari@ipeit.rnu.tn