Topologically protected measurement of orbital angular momentum of light
Optics
2024-10-02 v1
Abstract
We develop a weak measurement scheme for measuring orbital angular momentum (OAM) of light based on the global topology in wave function. We introduce the spin-orbit coupling to transform the measurement of OAM to the pre- and postselected measurement of polarization. The OAM number can be precisely and promptly recognized using single-shot detection without the need for spatial resolution. More significantly, the measurement results exhibit topological robustness under random phase perturbations. This scheme has the potential to be applied as a paradigm in the OAM-based optical computing, metrology and communication.
Keywords
Cite
@article{arxiv.2410.00331,
title = {Topologically protected measurement of orbital angular momentum of light},
author = {Junfan Zhu and An Wang and Yurong Liu and Fuhua Gao and Zhiyou Zhang},
journal= {arXiv preprint arXiv:2410.00331},
year = {2024}
}