Chongfan Technology
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28
2026
-
07
Symmetric Coding Multiplexing Laser Based on Twisted Moiré Photonic Superlattices
Author:
The Jun Guan team at the Chinese University of Hong Kong’s Shenzhen Campus has demonstrated how twisted moiré photonic superlattices can realize symmetry‑encoded multiplexing of laser functionalities. By constructing a moiré laser based on perovskite nanocrystals, the authors simultaneously generate, in distinct spatial channels, polarization‑vortex beams originating from symmetry‑protected bound states in the continuum (BICs) and linearly polarized beams arising from symmetry‑broken radiation modes. They found that although the superlattice’s symmetry gives rise to multiple BICs through photon‑band folding, asymmetric interference between the superlattice and sublattice modes converts the BICs at the moiré Γ point into radiative modes, thereby yielding symmetry‑broken polarization characteristics. By using the twist angle as a tuning parameter, the authors achieved independent modulation of laser emission directionality while preserving the polarization states across multiple channels. The moiré‑coupling‑induced multiplexed light‑manipulation technique they uncovered opens up new possibilities for multi‑channel visible‑light communication, holographic displays, and augmented reality.
The research findings were published in ACS Nano on July 16, 2026, under the title “Symmetry-Encoded Multiplexed Lasing Enabled by Twisted Moiré Photonic Coupling.”
Figure 1: Symmetric coding multiplexing laser based on a twisted moiré photonic superlattice.
Figure 2: Symmetry-protected BICs and symmetry-breaking radiative modes as multi-channel cavity modes.
Figure 3: Angular-resolved and polarization characteristics of Moiré laser emission
Figure 4: Tunable multi-beam emission direction (polarization state remains unchanged)
Source: Optics World
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