Chiral orbital lasing in a twisted bilayer metasurface
Institute of Semiconductors · University of Chinese Academy of Sciences · +5 more institutions
Abstract
Chirality is a fundamental concept in physics, core to many phenomena in nonlinear optics, quantum physics and topological photonics. Photons are intrinsically chiral when carrying spin angular momentum, whereas orbital angular momentum can induce chirality when photons interact with structures with broken mirror symmetry. Here, we observe orbital chiral lasing from a twisted bilayer photonic structure, by leveraging its inherent structural chirality. We design and fabricate a Moiré-type optical structure consisting of two semiconductor membrane metasurfaces. By optically pumping the twisted bilayer, we achieve single-mode lasing over a broad spectral range of 250 nm. The lasing emission exhibits chiral…
Citation impact
- FWCI
- 16.57
- Percentile
- 99%
- References
- 60
Authors
14Topics & keywords
- Lasing threshold
- Photon
- Photonics
- Angular momentum
- Chirality (physics)
- Bilayer
- Azimuthal quantum number