Far-field phonon coupling in valley metamaterial circuits
On-chip whispering-gallery-mode cavities enable versatile bosonic wave manipulation but typically rely on near-field evanescent coupling. Here we experimentally demonstrate broadband far-field phonon coupling in a valley metamaterial cavity integrated with a Dirac-cone waveguide-termed a "Dirac strip". The far-field coupling is confirmed by transmission spectroscopy and spatiotemporal field mapping over distances up to approximately five wavelengths, enabling multiplexed, distance-robust coupling pathways that overcome near-field limitations. By combining near-field and far-field cavities on the same substrate, we achieve amplification and control of non-Hermitian dynamics through loss and distance modulation of sympathetic resonances, directly resolved via piezo-laser interferometry. This work establishes a scalable phononic platform for far-field coupling and paves the way for parallel topological wave processors.
Authors
- Zhiwei Guo (ORCID: https://orcid.org/0000-0002-8973-307X)
- Jia Zhou (ORCID: https://orcid.org/0000-0002-9098-5661)
- Zheng Zhong (ORCID: https://orcid.org/0000-0002-3716-3343)
- Yuxuan Zhang (ORCID: https://orcid.org/0000-0001-6141-6825)
- Qi Wang (ORCID: https://orcid.org/0000-0002-2833-9175)
- Oliver B. Wright (ORCID: https://orcid.org/0000-0003-3035-0901)
- Yongdong Pan (ORCID: https://orcid.org/0000-0003-4975-7082)
- Weitao Yuan (ORCID: https://orcid.org/0000-0001-5063-5328)
- Jinfeng Zhao (ORCID: https://orcid.org/0000-0003-1751-6858)
- Yao Huang (ORCID: https://orcid.org/0000-0002-8591-2070)
- Y.C. Zhou (ORCID: https://orcid.org/0000-0003-1783-3669)
Institutions
- Tongji University (CN)
- Harbin Institute of Technology (CN)
- Hokkaido University (JP)
- Fudan University (CN)
- Nanjing University of Science and Technology (CN)
- State Key Laboratory of ASIC and System
- Southwest Jiaotong University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-12-11
- DOI
- https://doi.org/10.1038/s41467-025-67108-6
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China