Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published March 2009 | Published
Journal Article Open

Local density of states, spectrum, and far-field interference of surface plasmon polaritons probed by cathodoluminescence


The surface plasmon polariton (SPP) field intensity in the vicinity of gratings patterned in an otherwise planar gold surface is spatially resolved using cathodoluminescence (CL). A detailed theoretical analysis is presented that successfully explains the measured CL signal based upon interference of transition radiation directly generated by electron impact and SPPs launched by the electron and outcoupled by the grating. The measured spectral dependence of the SPP yield per incoming electron is in excellent agreement with rigorous electromagnetic calculations. The CL emission is shown to be similar to that of a dipole oriented perpendicular to the surface and situated at the point of electron impact, which allows us to establish a solid connection between the CL signal and the photonic local density of states associated to the SPPs.

Additional Information

© 2009 The American Physical Society. Received 15 October 2008; published 17 March 2009. This work is part of the research program of FOM, which is financially supported by NWO. This work is also funded by NANONED. Work at Caltech is financially supported by the AFOSR under MURI with Grant No. FA9550-04-1-0434. F.J.G.A. acknowledges support from the Spanish MEC (Contract No. MAT2007-66050).

Attached Files

Published - Kuttge2009p1650Phys_Rev_B.pdf


Files (320.5 kB)
Name Size Download all
320.5 kB Preview Download

Additional details

August 21, 2023
October 18, 2023