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Terahertz flexible multiplexing chip enabled by synthetic topological phase transitions
Hang Ren1, Su Xu1, Zhidong Lyu2
1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
National Science Review
|July 15, 2024
Summary
Researchers demonstrated a flexible multiplexing chip for terahertz communication using topological phase transitions. This enables reconfigurable terahertz wave manipulation for advanced 6G networks.
Area of Science:
- Photonics
- Terahertz Communications
- Topological Photonics
Background:
- Flexible multiplexing chips are crucial for 6G terahertz communications.
- Current terahertz wave manipulation capabilities are insufficient for practical implementation.
Purpose of the Study:
- To experimentally demonstrate a flexible multiplexing chip for terahertz communication.
- To reveal the mechanism of topological phase transition and perseveration in a coupled bilayer system.
Main Methods:
- Utilizing a heterogeneously coupled bilayer valley Hall topological photonic system.
- Demonstrating controllable on-chip modular topological phase transitions and subchannel switching.
- Employing time-frequency interleaved subchannels for high-speed data transmission.
Main Results:
- Achieved flexible multiplexing with reconfigurable multidimensional channel utilization.
- Supported 10- and 12-Gbit/s QAM-16 data streams on 120 and 130 GHz carriers.
- Demonstrated functionality-reconfigurable, compactly integrated, and CMOS-compatible chips.
Conclusions:
- Unlocks interlayer heterogeneous topological phases for terahertz wave regulation.
- Enables ingenious on-chip terahertz wave manipulation.
- Paves the way for advanced 6G terahertz communication systems.
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