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Researchers have successfully demonstrated a fully integrated on-chip circuit that generates, routes, and electrically reads valley-dependent chiral photons using meta-waveguides and dichalcogenides. This breakthrough overcomes previous hurdles in controlling valley degrees of freedom at room temperature, achieving near-unity efficiency and high polarization selectivity essential for practical valleytronics. The work represents a significant advancement toward scalable, light-based optical circuits capable of processing valley-multiplexed information.

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Li and Xing Demonstrate On-Chip Valley Information Processing

Quantum ZeitgeistMay 31, 20264 min read

Researchers built an on-chip circuit integrating meta-waveguides & dichalcogenides for in situ generation and electrical readout of valley-dependent.

Researchers led by Chi Li and Kaijian Xing have demonstrated a fully integrated circuit capable of generating, routing, and electrically reading valley-dependent chiral photons, a critical step toward practical light-based valleytronics. Transition metal dichalcogenides couple valley-polarized excitons to valley-dependent chiral photons, but achieving on-chip control of these properties has remained a significant hurdle until now. The team’s device utilizes a meta-waveguide to generate near-unity valley-dependent chiral photons from a tungsten disulfide…

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