ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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                   ELTE Institute of Physics
                SEMINARS IN STATISTICAL PHYSICS


                         9th March 2016
                       Wednesday, 11 a.m.

                        Anupam Mukherjee

    Centro de Investigación en Ingeniería y Ciencias Aplicadas,
  Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico

   "Controlling the optical properties of composite multilayered
           photonic structures: effect of superposition"


Tunability of the optical response of multilayered photonic structures has 
been
compared with sequential (SQ) and superposition (SP) addition of refractive
index profile functions. The optical response of the composite multilayered
structure, formed after the SP addition of the two Bragg type refractive index
profile functions has been studied as a function of percentage overlap and
relative shift between the profiles. Apart from the substantial advantage in
terms of the reduced physical thickness of the SP composite structures (over 
the
SQ addition), at certain optimum values of relative shift, photonic structures
with better quality factor resonant modes or a broader PBG could be designed.
The experimental verification of the optical response was carried out through
multilayered dielectric porous silicon structures fabricated by 
electrochemical
anodization.


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