Directive emission of red conjugated polymer embedded within zero index metamaterials
Cao, Tun; Zou, Yang; Adawi, Ali; Cryan, Martin J.
Dr Ali Adawi A.Adawi@hull.ac.uk
Reader in Physics
Martin J. Cryan
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.
Cao, T., Zou, Y., Adawi, A., & Cryan, M. J. (2014). Directive emission of red conjugated polymer embedded within zero index metamaterials. Optics express, 22(19), 22699-22706. https://doi.org/10.1364/OE.22.022699
|Journal Article Type||Article|
|Acceptance Date||Sep 8, 2014|
|Online Publication Date||Sep 11, 2014|
|Publication Date||Sep 22, 2014|
|Deposit Date||Oct 28, 2015|
|Publicly Available Date||Nov 23, 2017|
|Peer Reviewed||Peer Reviewed|
|Keywords||Red conjugated polymer, Zero index metamaterials|
|Additional Information||Authors' accepted manuscript of article published in: Optics express, 2014, v.22, issue 19|
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