Increase of photoluminescence blinking frequency of 3C–SiC nanocrystals with excitation power  

作　　者：Zhixing Gan Weiping Zhou Ming Meng 甘志星;周卫平;孟明

机构地区：[1]Center for Quantum Transport and Thermal Energy Science, Key Laboratory of Optoelectronic Technology of Jiangsu Province,School of Physics and Technology, Nanjing Normal University [2]School of Science, Nanjing University of Science and Technology [3]School of Physics and Telecommunication Engineering, Zhoukou Normal University

出　　处：《Chinese Physics B》2018年第12期136-140,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11604155,11604147,and 51702379);China Postdoctoral Science Foundation(Grant Nos.2016M600428 and 2017T100386);the Planned Projects for Postdoctoral Research Funds of China(Grant No.1601023A)

摘　　要：Super-resolution optical fluctuation imaging is dependent on the blinking frequency of fluorophores.Consequently,improvement of the photoluminescence(PL)blink frequency is important.This is achieved for 3C–SiC nanocrystals(NCs)by simply increasing the excitation power.Using an excitation of 488 nm with powers of 5μW to 50μW,individual 3C–SiC NC always exhibits PL blinking with a short on-state sojourn time(<0.1 s).A fast Fourier transform method is exploited to determine the PL switching frequency.It is found that the frequency of the bright state increases from 2 Hz to 20 Hz as the excitation power increases from 5μW to 50μW,which is explained by the Auger photonionization model.Super-resolution optical fluctuation imaging is dependent on the blinking frequency of fluorophores.Consequently,improvement of the photoluminescence(PL)blink frequency is important.This is achieved for 3C–SiC nanocrystals(NCs)by simply increasing the excitation power.Using an excitation of 488 nm with powers of 5μW to 50μW,individual 3C–SiC NC always exhibits PL blinking with a short on-state sojourn time(<0.1 s).A fast Fourier transform method is exploited to determine the PL switching frequency.It is found that the frequency of the bright state increases from 2 Hz to 20 Hz as the excitation power increases from 5μW to 50μW,which is explained by the Auger photonionization model.

关 键 词：PHOTOLUMINESCENCE NANOCRYSTALS BLINKING Auger photonionization 

分 类 号：O4[理学—物理]