In this article, the authors proposed a new type of polarimeter that is compact and well-suited for in-plane optical circuitry, while allowing for immediate determination of the SOP through simultaneous retrieval of the associated Stokes parameters.
Abstract:
The state of polarization (SOP) is an inherent property of the vectorial nature of light and a crucial parameter in a wide range of remote sensing applications. Nevertheless, the SOP is rather cumbersome to probe experimentally, as conventional detectors only respond to the intensity of the light, hence loosing the phase information between orthogonal vector components. In this work, we propose a new type of polarimeter that is compact and well-suited for in-plane optical circuitry, while allowing for immediate determination of the SOP through simultaneous retrieval of the associated Stokes parameters. The polarimeter is based on plasmonic phase-gradient birefringent metasurfaces that facilitate normal incident light to launch in-plane photonic waveguide modes propagating in six predefined directions with the coupling efficiencies providing a direct measure of the incident SOP. The functionality and accuracy of the polarimeter, which essentially is an all-polarization sensitive waveguide metacoupler, is confirmed through full-wave simulations at the operation wavelength of 1.55$\mu$m.
TL;DR: Silva et al. as mentioned in this paper proposed reflective metasurfaces consisting of arrayed gold nanobricks atop a subwavelength-thin dielectric spacer and optically-thick gold film, a configuration that supports gap-surface plasmon resonances.
TL;DR: In this article, an in-line (signal-saving) metasurface polarimeter is proposed based on subwavelength-spaced phased arrays of gold nanorod antennas that provide an intensity modulation of scattered light depending on the polarization of the incident light.
TL;DR: In this paper, a template stripping-based method for patterning an optical fiber facet using template stripping to transfer a gold pattern to a UV-curable hybrid polymer is presented, demonstrating the capacity of the miniaturization of the metasurface polarimeter.
TL;DR: In this article, an integrated polarimetric detector using a polarization-dependent light sorting metamaterial grating is proposed and its theoretical principles of operation are discussed, which is capable of determining the Stokes parameters of incident light from the separated currents.
TL;DR: In this article, random nanoparticle arrays on metal surfaces, enabling strong multiple scattering of surface plasmon polaritons (SPPs), produce upon illumination complicated SPP scattered patterns, whose angular spectra are uniquely determined by the polarization and wavelength of light, representing thereby spectropolarimetric fingerprints.
TL;DR: In this article, the Stokes parameters for visible light using periodic metal structures are simultaneously determined using multiple measurements, thus potentially leading to inaccuracies, and a method to simultaneously determine the parameters of visible light with multiple measurements is proposed.
TL;DR: In this paper, a grating fabricated through nanoscale volumetric cross-linking of a liquid crystalline polymer enables remote polarization control over the diffracted channels, which is a consequence of the responsivity of liquid crystal networks upon light stimuli.
Q1. What are the contributions mentioned in the paper "Waveguide metacouplers for in-plane polarimetry" ?
• You may download this work for personal use only. If you believe that this document breaches copyright please contact us providing details and the authors will investigate your claim. You may not further distribute the material or use it for any profit-making activity or commercial gain •
Q2. What are the future works mentioned in the paper "Waveguide metacouplers for in-plane polarimetry" ?
In summary, the authors design a compact in-plane polarimeter that couples incident light into waveguide modes propagating along six different directions, with the coupling efficiencies being dictated by the SOP. Finally, the authors stress that the suggested in-plane polarimeter can be realized by only one step of electron-beam lithography, while simple proof-of-concept experiments can be performed by placing outcoupling gratings along the six in-plane propagation directions, with the associated scattered light being a measure of the coupling efficiencies. Moreover, the authors foresee the possibility of a compact circuitry with built-in plasmonic detectors that are integrated into spatially confined waveguides [ 33,34 ]. The authors note that the choice of the design wavelength at 1. 55 μm is merely to illustrate its potential usage in compact integrated optical circuitry, but the design strategy can be transferred to any frequency range of interest, be it either at optical wavelengths [ 30 ] or the microwave regime [ 31 ].