Year: 2022
Type: preprint
Abstract: The advance of topological photonics has heralded a revolution for manipulating light as well as for the development of novel photonic devices such as topological insulator lasers. Here, we demonstrate topological lasing of circular polarization in a polymer-cholesteric liquid crystal (P-CLC) superlattice, tunable in the visible wavelength regime. By use of the femtosecond-laser direct-writing and self-assembling techniques, we establish the P-CLC superlattice with a controlled mini-band structure and a topological interface defect, thereby achieving a low threshold for robust topological lasing at about 0.4 μJ. Thanks to the chiral liquid crystal, not only the emission wavelength is thermally tuned, but the circularly polarized lasing is readily achieved. Our results bring about the possibility to realize compact and integrated topological photonic devices at low cost, as well as to engineer an ideal platform for exploring topological physics that involves light-matter interaction in soft-matter environments.
Source: Research Square
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1019671501, G1474490597, G1652261124, G176339990, G2477625050, G2935481155, G3074749915, 聚合物手性液晶复合结构中的可见波段可调谐拓扑激射研究, G3313271907, G3399522341, G3665539477, G3989659130, G400352038, G4060966423, G4423685222, G4516330647, G4784147289, G4808349555, Light and Matter, G622883409, G626131099, G731701638, G7518337617, G7725635414, G8691612046, G8759337311, G8824560306
OpenAlex ID: W4280569999