Fabry-Pérot resonators for surface plasmon polaritons probedby cathodoluminescence

Surface plasmon polariton Fabry-Pérot resonators were made in single-crystalline gold by focused ion beam milling of two parallel 100 nm deep grooves. The plasmonic cavity modes were spatially and spectrally resolved using cathodoluminescence spectroscopy. Mode numbers up to n = 10 were observed. Th...

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Bibliographic Details
Published in:Applied physics letters 2009-05, Vol.94 (18), p.183104-183104-3
Main Authors: Kuttge, M., Vesseur, E. J. R., Polman, A.
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Summary:Surface plasmon polariton Fabry-Pérot resonators were made in single-crystalline gold by focused ion beam milling of two parallel 100 nm deep grooves. The plasmonic cavity modes were spatially and spectrally resolved using cathodoluminescence spectroscopy. Mode numbers up to n = 10 were observed. The cavity quality factor Q depends strongly on groove depth; the highest Q = 21 was found for groove depth of 100 nm at λ = 690   nm . The data are consistent with finite-difference time domain calculations that show that the wavelength of maximum reflectivity is strongly correlated with groove depth.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3126484