Abstract
A near-field coupling method for studying propagation properties of surface plasmon polariton (SPP) in subwavelength dielectric-loaded SPP waveguides (DLSPPWs) is presented. In this method, a tapered fiber probe is employed to generate a nanometer optical spot. When this spot is near the entrance of the DLSPPW with its polarization parallel to the waveguide, a strong guiding wave is observed by a leakage radiation microscope. For DLSPPWs with a dielectric height of about 600 nm, we observed SPP waves with zigzag propagation patterns at 650 nm wavelength. Such zigzag propagation results in a great reduction of propagation loss. In addition, the zigzag wave has a strong optical confinement. The bending loss for an L-bend DLSPPW is only about 0.4 dB.
Similar content being viewed by others
References
Bozhevolnyi SI (2008) Plasmonic nanoguides and circuits. Pan Stanford Publishing, Singapore
Ebbesen TW, Genet C, Bozhevolnyi SI (2008) Surface-plasmon circuitry. Phys Today 61(5):44–50
Barnes WL, Dereux A, Ebbesen TW (2003) Surface plasmon subwavelength optics. Nature 424:824–830
Maier SA, Atwater HA (2005) Plasmonics: localization and guiding of electromagnetic energy in metal/dielectric structures. J Appl Phys 98:011101
Lal S, Link S, Halas NJ (2007) Nano-optics from sensing to waveguiding. Nat Photon 1:641–648
Bozhevolnyi SI, Volkov VS, Devaux E, Laluet J-Y, Ebbesen TW (2006) Channel plasmon subwavelength waveguide components including interferometers and ring resonators. Nature 440:508–511
Steinberger B, Hohenau A, Ditlbacher H, Aussenegg FR, Leitner A, Krenn JR (2007) Dielectric stripes on gold as surface plasmon waveguides: bends and directional couplers. Appl Phys Lett 91:081111
Holmgaard T, Bozhevolnyi SI (2007) Theoretical analysis of dielectric-loaded surface plasmon-polariton waveguides. Phys Rev B 75:245405
Massenot S, Grandidier J, Bouhelier A, des Francs GC, Markey L, Weeber J-C, Dereux A, Renger J, Gonzalez MU, Quidant R (2007) Polymer-metal waveguides characterization by Fourier plane leakage radiation microscopy. Appl Phys Lett 91:243102
Krasavin AV, Zayats AV (2008) Three-dimensional numerical modeling of photonic integration with dielectric-loaded SPP waveguides. Phys Rev B 78:045425
Holmgaard T, Bozhevolnyi SI, Markey L, Dereux A (2008) Dielectric-loaded surface plasmon-polariton waveguides at telecommunication wavelengths: excitation and characterization. Appl Phys Lett 92:011124
Dicken MJ, Sweatlock LA, Pacifici D, Lezec HJ, Bhattacharya K, Atwater HA (2008) Electrooptic modulation in thin film barium titanate plasmonic interferometers. Nano Lett 8(11):4048–4052
Gosciniak J, Bozhevolnyi SI, Andersen TB, Volkov VS, Kjelstrup-Hansen J, Markey L, Dereux A (2010) Thermo-optic control of dielectric-loaded plasmonic waveguide components. Optic Express 18:1207–1216
Krasavin AV, Zayats AV (2010) Electro-optic switching element for dielectric-loaded surface plasmon polariton waveguides. Appl Phys Lett 97:041107
Wei PK, Chen YC, Kuo HL (2003) Systematic variation of polymer jacketed fibres and the effects on tip etching dynamics. J Microsc 210(3):334–337
Karraï K, Grober RD (1995) Piezoelectric tip-sample distance control for near field optical microscopes. Appl Phys Lett 66:1842–1844
Betzig E, Chichester RJ (1993) Single molecules observed by near-field scanning optical microscopy. Science 262:1422–1425
Sönnichsen C, Duch AC, Steininger G, Koch M, von Plessen G, Feldmann J (2000) Launching surface plasmons into nanoholes in metal films. Appl Phys Lett 76:140–142
Buckley R, Berini P (2007) Figures of merit for 2D surface plasmon waveguides and application to metal stripes. Optic Express 15:12174–12182
Acknowledgments
This research is supported by the National Science Council, Taiwan (Grant no. NSC-99-3112-B-001-022) and the Nano Program of Academia Sinica, Taiwan.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Hsu, SY., Jen, TH., Lin, EH. et al. Near-Field Coupling Method for Subwavelength Surface Plasmon Polariton Waveguides. Plasmonics 6, 557–563 (2011). https://doi.org/10.1007/s11468-011-9236-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11468-011-9236-1