Hybrid photonic-plasmonic molecule based on metal/Si disks
2013 (English)In: Optics Express, ISSN 1094-4087, Vol. 21, no 9, 11037-11047 p.Article in journal (Refereed) Published
Optical properties of two identical coupled disks forming a "hybrid photonic-plasmonic molecule" are investigated. Each disk is a metal-dielectric structure supporting hybrid plasmonic-photonic whispering-gallery (WG) modes. The WG modes of a molecule split into two groups of nearly-degenerate modes, i.e., bonding and anti-bonding modes. The oscillation of quality factor (Q) with the inter-disk gap d and significant enhancement at certain inter-disk gaps can be observed. An enhanced Q factor of 1821 for a hybrid photonic-plasmonic molecule composed of two 1.2 mu m-diameter disks, compared with that for a single disk, is achieved. The corresponding Purcell factor is 191, making the hybrid photonic-plasmonic molecule an optimal choice for subwavelength-scale device miniaturization and light-matter interactions. Moreover, the far-field emission pattern of the hybrid photonic-plasmonic molecule exhibits an enhanced directional light output by tuning the azimuthal mode number for both bonding and anti-bonding modes.
Place, publisher, year, edition, pages
2013. Vol. 21, no 9, 11037-11047 p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-124296DOI: 10.1364/OE.21.011037ISI: 000318906500092ScopusID: 2-s2.0-84878533930OAI: oai:DiVA.org:kth-124296DiVA: diva2:634445
FunderSwedish Research Council
QC 201307012013-07-012013-06-282013-07-01Bibliographically approved