Title :
Narrowing of transmittance band gaps in a multilayered microsphere with quasiperiodic left-handed stack
Author :
Burlak, Gennadiy ; Díaz-de-Anda, A.
Author_Institution :
Centro de Investig. en Ing. y Cienc. Aplic., Univ. Autonoma del Estado de Morelos, Cuernavaca, Mexico
Abstract :
We studied the photon spectrum in coated microspheres with alternating quasiperiodic layers having left-handed (LH) materials included. It is found that the band gap (spectral zone of nearly zero transmittance) in such a system is strongly enhanced. At an increase of the quasiperiodicity parameter (QP), the boundaries of the spectral band gaps acquire intended shape. When QP exceeds the inverse golden mean value, a structure with extremely narrow separated resonant peaks with nearly complete transmittance arises. At increase QP such resonances migrate to the centre of the band gap. This effect allows creating optical filters with extremely narrow passbands.
Keywords :
dielectric materials; energy gap; metamaterials; optical filters; optical multilayers; left-handed materials; multilayered microsphere; narrow passbands; optical filters; photon spectrum; quasiperiodic left-handed stack; separated resonant peaks; transmittance band gaps; Frequency; Optical filters; Optical polymers; Optical refraction; Optical resonators; Optical sensors; Optical variables control; Photonic band gap; Quadratic programming; Resonance; coated microspheres; left-handed materials; photon spectrum; quasiperiodic layers;
Conference_Titel :
Transparent Optical Networks (ICTON), 2010 12th International Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-7799-9
Electronic_ISBN :
978-1-4244-7797-5
DOI :
10.1109/ICTON.2010.5549313
