Narrow transmittance peaks in a multilayered microsphere with a quasiperiodic left-handed stack
| Autor: | Gennadiy N Burlak, René Santaolaya Salgado, A. Díaz-de-Anda, Joaquín Pérez Ortega |
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| Rok vydání: | 2010 |
| Předmět: |
Photon
Materials science business.industry Band gap Spectral bands Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Quasiperiodicity Optics Stack (abstract data type) Quasiperiodic function Transmittance Electrical and Electronic Engineering Physical and Theoretical Chemistry business Optical filter |
| Zdroj: | Optics Communications. 283:3569-3577 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2010.05.041 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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