Frequency conversion of vortex states by chiral flexural acoustic phonons
Zeng X, Russell PS, Stiller B (2025)
Publication Type: Journal article
Publication year: 2025
Journal
Book Volume: 13
Pages Range: 1997-2012
Journal Issue: 7
DOI: 10.1364/PRJ.557205
Abstract
An object or system is said to be chiral if it cannot be superimposed on its mirror reflection. Chirality is ubiquitous in nature, for example, in protein molecules and chiral phonons—acoustic waves carrying angular momentum—which are usually either intrinsically present or magnetically excited in suitable materials. Here, we report the use of intervortex forward Brillouin scattering to optically excite chiral flexural phonons in a twisted photonic crystal fiber, which is itself a chiral material capable of robustly preserving circularly polarized optical vortex states. The phonons induce a spatiotemporal rotating linear birefringence that acts back on the optical vortex modes, coupling them together. We demonstrate intervortex frequency conversion under the mediation of chiral flexural phonons and show that, for the same phonons, backward and forward intervortex conversion occurs at different wavelengths. The results open up, to our knowledge, new perspectives for Brillouin scattering and the chiral flexural phonons offer new opportunities for vortex-related information processing and multi-dimensional vectorial optical sensing.
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Germany (DE)How to cite
APA:
Zeng, X., Russell, P.S., & Stiller, B. (2025). Frequency conversion of vortex states by chiral flexural acoustic phonons. Photonics Research, 13(7), 1997-2012. https://doi.org/10.1364/PRJ.557205
MLA:
Zeng, Xinglin, Philip S.T.J. Russell, and Birgit Stiller. "Frequency conversion of vortex states by chiral flexural acoustic phonons." Photonics Research 13.7 (2025): 1997-2012.
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