6533b7d7fe1ef96bd1268fcc
RESEARCH PRODUCT
Improving the vertical radiation pattern issued from multiple nano-groove scattering centers acting as an antenna for future integrated optics Fourier transform spectrometers in the near IR
Alain MorandI. HerasEtienne Le CoarerPierre BenechGuillermo MartinGwenn UlliacNadège Courjalsubject
Materials sciencebusiness.industryScatteringDetectorPhysics::Optics02 engineering and technologyFresnel equations021001 nanoscience & nanotechnology01 natural sciencesDirectivityAtomic and Molecular Physics and OpticsFourier transform spectroscopyRadiation pattern010309 opticsOptics0103 physical sciencesRadiative transfer[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicReflection coefficient0210 nano-technologybusinessComputingMilieux_MISCELLANEOUSdescription
The stationary wave integrated Fourier transform spectrometer (SWIFTS) is based on the sampling of a stationary wave using nano-scattering centers on the surface of a channel waveguide. Single nano-scale scattering centers above the waveguide surface will radiate the sampled signal with wide angular distribution, which is not compatible with the buried detection area of infrared (IR) detectors, resulting in crosstalk between pixels. An implementation of multiple diffraction nano-grooves (antenna) for each sampling center is proposed as an alternative solution to improve directivity towards the detector pixel by narrowing the scattering angle of the extracted light. Its efficiency is demonstrated from both simulated and measured far-field radiative patterns exhibiting a promising method to be used for the future integrated IR-SWIFTS.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 |