Work

Single-photon radiation enhancement and far-field regulation based on twist angle defects lattice cavities

Year: 2025

Type: article

Abstract: Efficient and versatile single-photon sources are crucial components for practical quantum communication. The weak coupling of micro-nano photonic structures with quantum dots significantly enhances single-photon performance by accelerating the photon radiation rate, regulating the far-field distribution, and enhancing photon collection efficiency. We propose a novel defect design, twist angle defects (TADs), which greatly improve far-field radiation patterns based on the band-folding principle. Through systematic optimization of the structural parameters, the TADs lattice cavity has achieved a collection efficiency approaching 90% and a Purcell factor exceeding 40. Furthermore, this cavity exhibits excellent robustness, with tolerances for positional shifts and hole radius variations being ±100 nm and ±5 nm, respectively. The TADs lattice cavity is fully compatible with existing micro-nano processing techniques, offering a promising new device for future quantum information experiments.

Source: Optics Express

DOI: 10.1364/oe.554328

Authors: Haiping Zhang, Yuxing Wang, Rongbin Su

Language: English

Topic: Photonic Crystals and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Guangzhou Municipal Science and Technology Project, National Key Research and Development Program of China

Awards: G2107764600, G2191910855, G2542298136, G6415061555