Spin photonics on chip based on a twinning crystal metamaterial
Abstract
Two-dimensional photonic circuits with high capacity are essential for a wide range of applications in next-generation photonic information technology and optoelectronics. Here we demonstrate a multi-channel spin-dependent photonic device based on a twinning crystal metamaterial. The structural symmetry and material symmetry of the twinning crystal metamaterial enable a total of 4 channels carrying different transverse spins because of the spin-momentum locking. The orientation of the anisotropy controls the propagation direction of each signal, and the rotation of the E-field with respect to energy flow determines the spin characteristics during input/output coupling. Leveraging this mechanism, the spin of an incident beam can be maintained during propagation on-chip and then delivered back into the free space, offering a new scheme for metamaterial-based spin-controlled nano-photonic applications.
Keywords
Cite
@article{arxiv.2306.05429,
title = {Spin photonics on chip based on a twinning crystal metamaterial},
author = {Yan Li and Jingbo Sun and Yongzheng Wen and Xiaoyu Xiong and Ji Zhou},
journal= {arXiv preprint arXiv:2306.05429},
year = {2023}
}