Quadruple Moiré Pockets in Lateral Heterobilayers: Programmable Phononic Reconfiguration and Anomalous Second Harmonic Generation

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Analysis reveals enhanced second‐harmonic generation in transition‐metal dichalcogenides, suggesting new potential for opto-straintronics.

Up to 480% enhancement in second‐harmonic generation observed in WS 2 /WSe 2 at θ–3° is significant for quantum optoelectronics.
Findings indicate that excitons and phonons are influenced by lattice‐relaxation and volumetric dilation effects in transition‐metal dichalcogenides.
Moiré‐engineering facilitates programmable phononic reconfiguration across various θ angles, which affects interlayer coupling and resonance frequencies.
Results highlight the implications for future opto‐straintronics applications utilizing layered transition‐metal dichalcogenides.

Chakraborty et al. (2025) studied this question.

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Analysis reveals enhanced second‐harmonic generation in transition‐metal dichalcogenides, suggesting new potential for opto-straintronics.