Two-spin-multiplexed optoacoustic light storage in chiral photonic crystal fiber

TL;DR

This paper demonstrates a novel two-spin-channel multiplexed photonic memory using chiral photonic crystal fiber, enabling coherent, reconfigurable storage of optical information with preserved polarization states for advanced quantum and classical information processing.

Contribution

It introduces a new chiral Brillouin scattering-based memory that utilizes circular polarization channels for scalable, multidimensional optical data storage and retrieval.

Findings

Successfully stored and retrieved multiple optical pulses using polarization channels.

Achieved tunable storage time while maintaining coherence and channel orthogonality.

Established chiral Brillouin scattering as a viable mechanism for spin-channel multiplexed light storage.

Abstract

The ability to coherently store and manipulate optical information across multiple degrees of freedom is a central requirement for scalable quantum information processing and multidimensional quantum computing. While polarization- and space-division-multiplexing have substantially increased the capacity of classical optical systems, their extension to coherent and reconfigurable photonic memories remains a key challenge. Here we demonstrate a two-spin-channel-multiplexed photonic memory based on chiral stimulated Brillouin scattering in a chiral photonic crystal fiber. Exploiting the intrinsic preservation of circular polarization in the chiral photonic crystal fiber, left- and right-circularly polarized modes serve as two orthogonal and independent storage channels. Multiple optical data pulses can be selectively or simultaneously stored and retrieved by simply controlling the polarization states of the write-read pulses. The storage time is continuously tunable, and the underlying Brillouin process preserves coherence and channel orthogonality. The result establishes chiral Brillouin scattering as an effective mechanism for spin-channel-multiplexed optoacoustic light storage, providing a robust and scalable platform for multidimensional photonic memories. It also open new opportunities for classic and quantum information processing, reconfigurable quantum networks, and hybrid light-matter interfaces based on coherent acoustic excitations.