Design of omnidirectional asymmetrical high reflectors for optical telecommunication wavelengths
Laboratoire de Photovoltaïque et Matériaux Semi-conducteurs (LPMS), École Nationale d'ingénieurs de Tunis BP 37 Belvédère 1002 Tunis, Tunisia
Corresponding author: a email@example.com
Published online: 14 December 2004
A design for omnidirectional asymmetrical high reflectors for optical telecommunication wavelengths is described. Asymmetry was introduced by applying a power law, so that the coordinates y of the transformed object were determined through the coordinates x of the quarter-wave stack air/H(LH)15/air in accordance with the following rule . Here k is the coefficient defining the asymmetry degree. It is shown that a high-reflection band at any incident angle for both polarizations, i.e., an omnidirectional high reflection band of 0.74 m for optical telecommunication wavelengths 0.85 and 1.3 m is found for the transformed system: air/Te(SiO2/Te)15/air corresponding to the optimized k value 0.24.
PACS: 42.70.Qs – Photonic bandgap materials / 78.20.Bh – Theory, models, and numerical simulation / 77.55.+f – Dielectric thin films
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004