Low-loss intersection of subwavelength plasmonic slot waveguides

Sanshui Xiao, Niels Asger Mortensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The properties of crossing for two perpendicular subwavelength plasmonic slot waveguides are theoretically investigated. Results show when encountering a nano intersection the crosstalk for the direct crossing is around 25%, almost the same as throughput. In terms of symmetry considerations and resonant-tunnelling effect, we design two types of compact cavity-based structures. Our results show that the crosstalk is eliminated and the throughput reaches the unity on resonance. Simulation results are in agreement with those from coupled-mode theory. Taking material loss into account, the symmetry properties of the modes are preserved and the crosstalk remains suppressed. Our results may open a way to construct nanoscale crossings for high-density nanoplasmonic integration circuits.
Original languageEnglish
Title of host publicationOptoelectronic Materials and Devices III
Place of PublicationHangzhou, China
PublisherSPIE - International Society for Optical Engineering
Publication date2008
Publication statusPublished - 2008
EventOptoelectronic Materials and Devices III - Hangzhou, China
Duration: 1 Jan 2008 → …


ConferenceOptoelectronic Materials and Devices III
CityHangzhou, China
Period01/01/2008 → …


Dive into the research topics of 'Low-loss intersection of subwavelength plasmonic slot waveguides'. Together they form a unique fingerprint.

Cite this