Enhanced single photon emission in silicon carbide with Bull's eye cavities  

作　　者：Xing-Hua Liu Fang-Fang Ren Jiandong Ye Shuxiao Wang Wei-Zong Xu Dong Zhou Mingbin Yu Rong Zhang Youdou Zheng Hai Lu 刘兴华;任芳芳;叶建东;王书晓;徐尉宗;周东;余明斌;张荣;郑有炓;陆海(School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China [2]State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China

出　　处：《Chinese Physics B》2022年第10期159-164,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 91850112, 61774081, 62004099, and 61921005);in part by Shenzhen Fundamental Research Program (Grant Nos. JCYJ20180307163240991 and JCYJ20180307154632609);in part by the State Key Research and Development Project of Jiangsu Province, China (Grant No. BE2018115);in part by the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20201253);in part by the State Key Research and Development Project of Guangdong Province, China (Grant No. 2020B010174002);in part by Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB43020500)。

摘　　要：The authors demonstrate a Bull's eye cavity design that is composed of circular Bragg gratings and micropillar optical cavity in 4H silicon carbide(4H-SiC) for single photon emission. Numerical calculations are used to investigate and optimize the emission rate and directionality of emission. Thanks to the optical mode resonances and Bragg reflections,the radiative decay rates of a dipole embedded in the cavity center is enhanced by 12.8 times as compared to that from a bulk 4H-SiC. In particular, a convergent angular distribution of the emission in far field is simultaneously achieved, which remarkably boost the collection efficiency. The findings of this work provide an alternative architecture to manipulate light-matter interactions for achieving high-efficient SiC single photon sources towards applications in quantum information technologies.

关 键 词：single photon sources 4H-SIC Bull's eye cavities color centers 

分 类 号：O43[机械工程—光学工程]