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2015 ; 5
(ä): 9606
Nephropedia Template TP
gab.com Text
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Deep-subwavelength imaging of both electric and magnetic localized optical fields
by plasmonic campanile nanoantenna
#MMPMID26045401
Caselli N
; La China F
; Bao W
; Riboli F
; Gerardino A
; Li L
; Linfield EH
; Pagliano F
; Fiore A
; Schuck PJ
; Cabrini S
; Weber-Bargioni A
; Gurioli M
; Intonti F
Sci Rep
2015[Jun]; 5
(ä): 9606
PMID26045401
show ga
Tailoring the electromagnetic field at the nanoscale has led to artificial
materials exhibiting fascinating optical properties unavailable in naturally
occurring substances. Besides having fundamental implications for classical and
quantum optics, nanoscale metamaterials provide a platform for developing
disruptive novel technologies, in which a combination of both the electric and
magnetic radiation field components at optical frequencies is relevant to
engineer the light-matter interaction. Thus, an experimental investigation of the
spatial distribution of the photonic states at the nanoscale for both field
components is of crucial importance. Here we experimentally demonstrate a
concomitant deep-subwavelength near-field imaging of the electric and magnetic
intensities of the optical modes localized in a photonic crystal nanocavity. We
take advantage of the "campanile tip", a plasmonic near-field probe that
efficiently combines broadband field enhancement with strong far-field to
near-field coupling. By exploiting the electric and magnetic polarizability
components of the campanile tip along with the perturbation imaging method, we
are able to map in a single measurement both the electric and magnetic localized
near-field distributions.