Frequency-division routing via spin-refractive-index locking.

Yuan-Peng Peng, Shi-Yao Zhu, J Q You, Yi-Pu Wang

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Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

4 authors.

Yuan-Peng PengZhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, State Key Laboratory for Extreme Photonics and Instrumentation, School of Physics, Zhejiang University, Hangzhou, China.

Shi-Yao ZhuZhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, State Key Laboratory for Extreme Photonics and Instrumentation, School of Physics, Zhejiang University, Hangzhou, China.

J Q YouZhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, State Key Laboratory for Extreme Photonics and Instrumentation, School of Physics, Zhejiang University, Hangzhou, China. jqyou@zju.edu.cn.ORCID http://orcid.org/0000-0002-5823-549X

Yi-Pu WangZhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, State Key Laboratory for Extreme Photonics and Instrumentation, School of Physics, Zhejiang University, Hangzhou, China. yipuwang@zju.edu.cn.ORCID http://orcid.org/0000-0002-5883-6295

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Here we demonstrate spin-refractive-index locking (SRIL) in a composite right-left-handed transmission-line metamaterial, where the transverse spin of surface modes is locked to the sign of the effective refractive index. Unlike conventional spin-momentum locking (SML), the SRIL reverses the spin for the same energy propagation direction in right- and left-handed bands. Using this index-dependent spin control, we realize frequency-selective chiral photon-magnon interaction by placing a yttrium iron garnet (YIG) sphere above the metamaterial and achieving strong nonreciprocity, where magnons only couple to microwaves of matching spin and the required direction is determined by the operating band. Tuning the frequency across the two bands dynamically switches the coupling direction, enabling a compact, reconfigurable on-chip routing device for spin-selective microwave control and nonreciprocal signal processing.

Identifiers

PMID41794886

DOI10.1038/s41467-026-70460-w

PMCPMC13096281

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LicenceCC BY-NC-ND

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.