Scalable Registration of Single Quantum Emitters within Solid Immersion Lenses through Femtosecond Laser Writing.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40494848.
- Also identified by DOI 10.1021/acs.nanolett.5c01325 and PMC identifier 12314893.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The precise registration of solid-state quantum emitters to photonic structures is a major technological challenge for fundamental research (e.g. in cavity quantum electrodynamics) and applications to quantum technology. Standard approaches include the complex multistep fabrication of photonic structures on pre-existing emitters, both registered within a grid of lithographically-defined markers. Here, we demonstrate a marker-free, femtosecond laser writing technique to generate individual quantum emitters within photonic structures. Characterization of 28 defect centers, laser-written at the centers of pre-existing solid immersion lens structures, showed offsets relative to the photonic structure's center of 260 nm in the <i>x</i>-direction and 60 nm in the <i>y</i>-direction, with standard deviations of ± 170 and ± 90 nm, respectively, resulting in an average 4.5 times enhancement of the optical collection efficiency. This method is scalable for developing integrated quantum devices using spin-photon interfaces in silicon carbide and is easily extendable to other materials.