Purification of single-photon emission from hBN using post-processing treatments

Nanophotonics

article

Chi Li¹  Zai-Quan Xu¹  Noah Mendelson¹  Mehran Kianinia¹  Milos Toth¹  Igor Aharonovich¹ 

[1] School of Mathematical and Physical Sciences, University of Technology Sydney

关键词: hexagonal boron nitride;    single-photon emitters;    two-dimensional materials;    thermal annealing;    UV ozone;   

DOI  :  10.1515/nanoph-2019-0099

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Single-photon emitters (SPEs) in hexagonal boron nitride (hBN) are promising components for on-chip quantum information processing. Recently, large-area hBN films prepared by chemical vapor deposition (CVD) were found to host uniform, high densities of SPEs. However, the purity of these emitters has, to date, been low, hindering their applications in practical devices. In this work, we present two methods for post-growth processing of hBN, which significantly improve SPEs in hBN films that had been transferred from substrates used for CVD. The emitters exhibit high photon purities in excess of 90% and narrow linewidths of ~3 nm at room temperature. Our work lays a foundation for producing high-quality emitters in an ultra-compact two-dimensional material system and paves the way for deployment of hBN SPEs in scalable on-chip photonic and quantum devices.

【 授权许可】

CC BY