TY - JOUR
T1 - Far- and near-field electron beam detection of hybrid cavity-plasmonic modes in gold microholes
AU - Carmeli, I.
AU - Itskovsky, M. A.
AU - Kauffmann, Y.
AU - Shaked, Y.
AU - Richter, S.
AU - Maniv, T.
AU - Cohen, H.
PY - 2012/1/24
Y1 - 2012/1/24
N2 - Electromagnetic far- and near-field excitations of rectangular microholes in gold films are investigated by means of a focused e beam. Radiative cavity modes, well below the surface plasmon (SP) frequency, are detected at exceptionally large distances and are shown to be strongly enhanced at near-field regions of selected slit walls due to hybridization with metal-supported SP polaritons. The proposed enhancement mechanism of such hybridized modes, found here to preserve the cutoff frequencies and symmetry characteristics of the pure waveguide modes, sheds light on the intriguing phenomenon of extraordinary optical transmission through subwavelength apertures in metallic films.
AB - Electromagnetic far- and near-field excitations of rectangular microholes in gold films are investigated by means of a focused e beam. Radiative cavity modes, well below the surface plasmon (SP) frequency, are detected at exceptionally large distances and are shown to be strongly enhanced at near-field regions of selected slit walls due to hybridization with metal-supported SP polaritons. The proposed enhancement mechanism of such hybridized modes, found here to preserve the cutoff frequencies and symmetry characteristics of the pure waveguide modes, sheds light on the intriguing phenomenon of extraordinary optical transmission through subwavelength apertures in metallic films.
UR - http://www.scopus.com/inward/record.url?scp=84856482248&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.85.041405
DO - 10.1103/PhysRevB.85.041405
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:84856482248
SN - 1098-0121
VL - 85
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 4
M1 - 041405
ER -