Tradeoff between mode confinement, loss, and cross-talk, for dielectric and metal slot waveguides
2009 (English)In: Photonics Letters of Poland, ISSN 2080-2242, Vol. 1, 172-174 p.Article in journal (Refereed) Published
Slot waveguides formed in high-index dielectrics or metals provide strong field enhancement in the slot region. When filled with nonlinear or lasing materials, they have the potential for highly efficient components for intensity dependent signal processing in integrated photonic circuits. In view of the increasing demand for high integration, metal slot waveguides have the great advantage of sub-diffraction mode confinement but they suffer from serious transmission loss. The total lateral field extent in their low-loss dielectric counterparts is, in turn, diffraction limited. Considering those tradeoffs, we show that at 24dB/ÎŒm cross-talk and the attenuation length of at least 5ÎŒm, gold slot waveguides can be spaced only ca 3.5 times denser than slot waveguides in silicon.
Place, publisher, year, edition, pages
2009. Vol. 1, 172-174 p.
Attenuation lengths; Diffraction limited; High-index; Integrated photonic circuit; Intensity-dependent; Lasing materials; Low loss; Slot waveguide; Strong field enhancement; Sub-diffraction; Transmission loss, Crosstalk; Dielectric materials; Diffraction; Signal processing, Waveguides
IdentifiersURN: urn:nbn:se:kth:diva-33995DOI: 10.4302/plp.2009.4.10ScopusID: 2-s2.0-78651569548OAI: oai:DiVA.org:kth-33995DiVA: diva2:418438
QC 201105232011-05-232011-05-232011-05-23Bibliographically approved