Andryieuski, Andrei

Bozhevolnyi, Sergey I.

Gramotnev, Dmitri K.

Lavrinenko, Andrei

Malureanu, Radu

Radko, Ilya P.

Volkov, Valentyn S.

Zenin, Vladimir A.

Surface plasmon-polaritons are a possible solution for on-chip transportation and manipulation of information. Although there are several possibilities for designing the plasmonic waveguides, the two major caveats for all of them are the coupling to/from external sources and the losses they exhibit. In this work we will present an overview of our simulation, fabrication and characterisation activity in the plasmonic field where we tackle these issues. We start with presenting an optimised nanoantenna for coupling of free-propagating waves into a subwavelength slot waveguide modes. Optimised antennae show an increase in coupling efficiency up to 185 times compared to a bare waveguide. Once optimized, the nanoantennae were fabricated and the propagation in the slot waveguides was characterised. The characterisation shows an increase in the effective area (proportional to the coupling efficiency) of up to 175 times, similar to the calculated optimised parameters. We then move our attention to effective tapering of the plasmonic modes such that to achieve either strong field enhancement or propagation into thin plasmonic nanowires. Using on-chip nanofocusing with impedance-matched nanoantenna we can obtain a field enhancement of up to ∼ 12000 evenly distributed in a volume of ∼ 30x 30 x 10 nm3. The same taper can be used also for modifying the waveguide profile from a wide strip waveguide to a nanorod waveguide showing both the flexibility of our taper design as well as allowing to measure and compare the propagation characteristics in waveguides with various widths. We show that the propagation length matches very well the theoretical one and also obtain a limit for confinement of the mode in this type of plasmonic waveguides of ∼ λ/15

Online Research Database In Technology

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Design, fabrication and SNOM investigation of plasmonic devices

Radu Malureanu

Vladimir A. Zenin

Andrei Andryieuski

Ilya P. Radko

Valentyn S. Volkov

Dmitri K. Gramotnev

Andrei V. Lavrinenko

Sergey I. Bozhevolnyi

Crossref

Zenin, Volodymyr

Radko, Ilya

Lavrinenko, Andrei V.

Syddansk Universitets Forskerportal

http://orbit.dtu.dk/ws/files/127664407/07734237.pdf

Design, fabrication and SNOM investigation of plasmonic devices

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Syddansk Universitets Forskerportal

Syddansk Universitets Forskerportal