Terahertz topological photonics for on-chip communication
| Autor: | Yuichiro Yamagami, Masayuki Fujita, Prakash Pitchappa, Yihao Yang, Julian Webber, Xiongbin Yu, Ranjan Singh, Tadao Nagatsuma, Baile Zhang |
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| Přispěvatelé: | School of Physical and Mathematical Sciences |
| Rok vydání: | 2020 |
| Předmět: |
Computer science
Terahertz radiation Physics::Optics FOS: Physical sciences Applied Physics (physics.app-ph) 02 engineering and technology Integrated circuit Photonic Devices Topology 01 natural sciences law.invention 010309 optics Photonic Crystals law Robustness (computer science) 0103 physical sciences Wireless Physics::Optics and light [Science] business.industry Physics - Applied Physics 021001 nanoscience & nanotechnology Chip Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Uncompressed video Photonics 0210 nano-technology business Physics - Optics Optics (physics.optics) Data rate units |
| Zdroj: | Nature Photonics. 14:446-451 |
| ISSN: | 1749-4893 1749-4885 |
| DOI: | 10.1038/s41566-020-0618-9 |
| Popis: | The computing speeds in modern multi-core processors and big data servers are no longer limited by the on-chip transistor density that doubles every two years following the Moores law, but are limited by the on-chip data communication between memories and microprocessor cores. Realization of integrated, low-cost, and efficient solutions for high speed, on-chip data communications require terahertz (THz) interconnect waveguides with tremendous significance in future THz technology including THz-wave integrated circuits and THz communication. However, conventional approaches to THz waveguiding suffer from sensitivity to defects and considerable bending losses at sharp bends. Here, building on the recently-discovered topological phase of light, we experimentally demonstrate robust THz topological valley transport on low-loss, all-silicon chips. We show that the valley polarized topological kink states exhibit unity transmission over a bulk band gap even after propagating through ten sharp corners. Such states are excellent information carriers due to their robustness, single-mode propagation, and linear dispersion-key properties for next generation THz communications. By leveraging the unique properties of kink states, we demonstrate error-free communication through a highly-twisted domain wall at an unprecedented data rate (10 Gbit/s) and uncompressed 4K high-definition video transmission. Our work provides the first experimental demonstration of the topological phases of THz wave, which could certainly inspire a plethora of research on different types of topological phases in two and three dimensions. Comment: 12 pages, 4 figures |
| Databáze: | OpenAIRE |
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