Polarization-based control of spin-orbit vector modes of light in biphoton interference

Abstract

We report the experimental generation of a class of spin-orbit vector modes of light via an asymmetric Mach-Zehnder interferometer, obtained from an input beam prepared in a product state of its spin and orbital degrees of freedom. These modes contain a spatially varying polarization structure which may be controllably propagated about the beam axis by varying the retardance between the vertical and horizontal polarization components of the light. Additionally, their transverse spatial intensity distributions may be continuously manipulated by tuning the input polarization parameters. In the case of an analogous biphoton input, we predict that this device will exhibit biphoton (Hong-Ou-Mandel) interference in conjunction with the aforementioned tunable mode transformations.

Research on the signal of 4He pump magnetometer sensor using ECDL laser

“…Laser light vertically into the λ/2 mirror through the direction adjust by the reflector mirror. λ/2 mirror can transform the laser light into the synthesis of vertical and horizontal polarization light [13]. λ/2 mirror can be rotating to control the energy of the two kinds of polarized light.…”