Directive emission of red conjugated polymer embedded within zero index metamaterials

Tun Cao*, Yang Zou, Ali M. Adawi, Martin J. Cryan

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

8 Citations (Scopus)

Abstract

We numerically demonstrate an impedance-matched multilayer stacked fishnet metamaterial that has zero index with flat high transmittance from 600nm to 620nm. The effective refractive index(neff) is calculated to be -0.045 + 0.466i and the normalize effective impedance(Zeff/ Z0) is 0.956-0.368i at 610nm. The light emitted by a red conjugated polymer layer embedded in such a zero index metamaterial (ZIM) is concentrated in a narrow cone in the surrounding media, where the half-power beam width (HPBW) of the center lobe of the radiation pattern is around 25° in the wavelength range between 600nm and 620nm, giving directive emission in the visible region. This proposed light focusing system can be applied to sensing, beam collimating and filtering functionalities.

Original languageEnglish
Pages (from-to)22699-22706
Number of pages8
JournalOptics Express
Volume22
Issue number19
DOIs
Publication statusPublished - 22 Sep 2014

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