Precisely positioned generation of CsPbBr3 nano-light sources in a Cs4PbBr6 film by electron beam irradiation

TL;DR

This paper demonstrates a method to precisely generate and position CsPbBr3 nano-light sources within a Cs4PbBr6 film using focused electron beam irradiation, enabling the creation of nano-light source arrays for nanophotonics.

Contribution

It provides direct evidence that electron beam irradiation can locally generate CsPbBr3 nanoparticles in a Cs4PbBr6 host, advancing on-chip quantum light source fabrication techniques.

Findings

CsPbBr3 nanoparticles can be locally generated by electron beam irradiation.

Nano-light source arrays with submicron spacing were successfully fabricated.

The method enables precise spatial control of nano-light emitters.

Abstract

Integration of high-quality photon emitters at specific locations within nanophotonic structures or optoelectronic devices is a key to innovating on-chip optical control and quantum technologies. Halide perovskite nanoparticles have great potential as single photon emitters with high quantum efficiency. To achieve their full potential, they must be embedded in a host material that ensures chemical stability and passivates surface defects. A previous experiment on a CsPbBr3-Cs4PbBr6 nanocomposite film suggested possibility that electron beam irradiation can be used to control positions of CsPbBr3 nano-light sources in the Cs4PbBr6 host although the effects of electron beam irradiation are not fully understood. Here, we fabricate a Cs4PbBr6-CsBr film, not containing the CsPbBr3 phase, and provide direct evidence that CsPbBr3 nanoparticles can be locally generated in the Cs4PbBr6 host by irradiation with a focused electron beam. We further demonstrate perovskite nano-light source arrays with submicron spacing using this method.