An All-Dielectric Metasurface Polarimeter

Area of Science:

• Optics and Photonics
• Metamaterials
• Quantum Information Science

Background:

• Light polarization is crucial for imaging mechanical stress and in quantum sensing.
• Conventional polarimetry is complex, often requiring multiple measurements and moving parts.
• Existing metasurfaces are limited to detecting specific polarization states (linear or circular/elliptical).

Purpose of the Study:

• To present an all-dielectric meta-polarimeter capable of directly measuring arbitrary polarization states.
• To demonstrate a single-unit-cell design for simplified and efficient polarimetry.
• To enable advanced applications in polarization imaging and quantum state tomography.

Main Methods:

• Engineered a completely asymmetric all-dielectric metasurface design.
• Utilized the metasurface to excite unique eigenmodes of nanoresonators.
• Analyzed the resulting unique diffraction patterns for different polarization states.

Main Results:

• The meta-polarimeter directly measures any arbitrary linear and elliptical polarization state, including handedness.
• Unique diffraction patterns generated by the metasurface are quantified into Stokes parameters.
• Achieved a polarization resolution of 5° and polarization state fidelity up to 99 ± 1%.

Conclusions:

• The developed meta-polarimeter simplifies the measurement of all light polarization states.
• This technology offers significant potential for polarization imaging and quantum state tomography.
• The single-unit-cell design represents a breakthrough in compact and efficient polarimetry.