Symmetry-Encoded Multiplexed Lasing Enabled by Twisted Moiré Photonic Coupling

Area of Science:

• Photonics
• Materials Science
• Quantum Optics

Background:

• Multifunctional lasers are key for advanced systems, but multiplexing light across degrees of freedom is challenging.
• Unconventional physical mechanisms are needed to achieve complex lasing behaviors.

Purpose of the Study:

• To demonstrate how twisted moiré photonic superlattices can enable symmetry-encoded, multiplexed lasing.
• To explore the use of perovskite nanocrystals in creating these novel moiré lasers.

Main Methods:

• Constructed moiré lasers using perovskite nanocrystals within twisted photonic superlattices.
• Investigated symmetry-protected bound states in the continuum (BICs) and symmetry-broken radiative modes.
• Utilized twist angles as a tuning parameter for laser emission.

Main Results:

• Achieved simultaneous generation of polarization-vortex beams (from BICs) and linearly polarized beams (from radiative modes).
• Demonstrated that asymmetric interference transforms BICs into radiative modes, enabling distinct polarization characteristics.
• Showcased independent modulation of laser emission directionality via twist angles, with invariant multichannel polarizations.

Conclusions:

• Twisted moiré photonic superlattices offer a novel platform for symmetry-encoded, multiplexed lasing.
• This approach enables independent control over laser emission directionality and polarization.
• Potential applications include multichannel visible-light communication, holographic displays, and augmented reality.