We study both experimentally and numerically far-field radiation patterns of single metallic nanowires coupled
to weak confined optical waveguides. The radiation pattern resulting from the interaction of the nanowire and
the optical mode depends strongly on the mode properties (polarization and wavenumber) and on the antenna
properties (material and size). To investigate these phenomena we compare the electric far-field distributions
computed with different numerical methods (Green's tensor technique, rigourous coupled wave method, Fourier
modal method). We also compare simulated results to experimental measurements obtained over a large spectral
domain ranging from 400 nm to 1000 nm. This study should be useful for optimizing nanostructured photonic
The size and the weight of current spectrometers is a serious issue regarding various applications, however the
technologies used in existing spectrometers prevent them from substantial improvement. SWIFTS (Stationary
Wave Integrated Fourier Transform Spectrometer) is a new familyof spectrometers based on a verypromising
technology. It is based on an original wayto fully sample the Fourier interferogram obtained in a waveguide
byeither a reflection (SWIFTS Lippmann) or counter-propagative (SWIFTS Gabor) interference phenomenon.
The sampling can be simultaneouslydone without anymo ving part thanks to "nano-detectors" located in the
evanescent field of the waveguide. It allows a dramatic reduction of the size and the weight of spectrometers
while improving their performances (high stabilityand high resolution δσ < 1cm-1).
Here, we present the development status of the SWIFTS Gabor and the results obtained (resolution of 4cm-1)
with existing technical solutions for the "nano-detectors" in visible and near infrared.
SWIFTS (Stationary Wave Integrated Fourier Transform Spectrometer) is based on a very promising
technology. It permits a drastic reduction of the size of spectrometers while conserving, even improving,
their performances. We present the first attempt to realise a SWIFTS based on wave guides in glass
operating in visible and near infra-red.
Here, we present an original optical near-field detection in which nanowires of gold are used to directly
sample the evanescent standing wave in the waveguide. With this first prototype we have been able to
rebuild a spectrum with a resolution R=95.