Narrow transmittance peaks in a multilayered microsphere with a quasiperiodic left-handed stack |
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Authors: | Gennadiy Burlak,A. Dí az-de-Anda,Joaquí n Pé rez Ortega |
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Affiliation: | a Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mor., Mxico b Departamento de Ciencias Computacionales, Centro Nacional de Investigación y Desarrollo Tecnológico CENIDET, Cuernavaca, Mor., Mxico |
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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 transmittancy) in such a system is strongly enhanced. At an increase of the quasiperiodicity parameter γ, the boundaries of the spectral band gaps acquire the intended shape. When γ exceeds the inverse golden mean value, a structure with extremely narrow separated resonant peaks with nearly complete transmittance arises. At increased γ, such resonances migrate to the center of the band gap. This effect allows creating optical filters with extremely narrow passbands. |
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Keywords: | Photon spectrum Quasiperiodic layers Coated microspheres Left-handed materials |
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