2 research outputs found
Supplement 1: Tracking nanoscale electric and magnetic singularities through three-dimensional space
Originally published in Optica on 20 June 2015 (optica-2-6-540
Polarization Multiplexing of Fluorescent Emission Using Multiresonant Plasmonic Antennas
Combining the ability
to localize electromagnetic fields at the
nanoscale with a directional response, plasmonic antennas offer an
effective strategy to shape the far-field pattern of coupled emitters.
Here, we introduce a family of directional multiresonant antennas
that allows for polarization-resolved spectral identification of fluorescent
emission. The geometry consists of a central aperture surrounded by
concentric polygonal corrugations. By varying the periodicity of each
axis of the polygon individually, this structure can support multiple
resonances that provide independent control over emission directionality
for multiple wavelengths. Moreover, since each resonant wavelength
is directly mapped to a specific polarization orientation, spectral
information can be encoded in the polarization state of the out-scattered
beam. To demonstrate the potential of such structures in enabling
simplified detection schemes and additional functionalities in sensing
and imaging applications, we use the central subwavelength aperture
as a built-in nanocuvette and manipulate the fluorescent response
of colloidal-quantum-dot emitters coupled to the multiresonant antenna