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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

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Spin-orbit optical Hall effect in π-vector fields.

Ziyao Lyu, Changshun Wang

|June 29, 2023

Summary

This summary is machine-generated.

Researchers demonstrate a wavelength-independent method to separate spin and orbital angular momentum in π-vector vortex light using a single liquid-crystalline film, advancing high-capacity optical applications.

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Area of Science:

Optics and Photonics
Quantum Information Science

Background:

Vector vortex light, with coupled spin and orbital angular momenta, is crucial for high-capacity optical applications due to increasing data demands.
The optical Hall effect offers a promising method for separating these angular momenta, but broadband responses for π-vector vortex modes remain a challenge.

Purpose of the Study:

To analyze and experimentally verify a wavelength-independent spin-orbit optical Hall effect for π-vector vortex modes.
To demonstrate a simple and effective method for decoupling angular momentum in vector optical fields.

Main Methods:

Theoretical analysis using Jones matrices to describe the spin-orbit optical Hall effect in π-vector fields.
Experimental verification using a single-layer liquid-crystalline film with designed holographic structures.

Main Results:

Demonstrated wavelength-independent separation of spin and orbital angular momentum in π-vector vortex modes.
Each π-vector vortex mode was decoupled into spin and orbital components of equal magnitude and opposite signs.
Successful experimental validation using a single-layer liquid-crystalline film.

Conclusions:

The proposed method enables efficient and broadband angular momentum separation for π-vector vortex modes.
This work contributes to the field of high-dimensional optics and optical information processing.
The use of a single liquid-crystalline film offers a practical approach for future optical device development.