Open AccessEfficiency of single photon emission in three-level system of semiconductor quantum dots with pulsed excitation
Author(s) -
Yaoyi Li,
Mu-Tian Cheng,
Huijun Zhou,
ShaoDing Liu,
QuQuan Wang,
Quan Xue
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.1781
Subject(s) - physics , excitation , quantum dot , pulse (music) , photon , excited state , atomic physics , correlation function (quantum field theory) , optics , quantum mechanics , detector , dielectric
The statistic characteristics of single photon emission in single semiconductor quantum dot with pulse excitation have been investigated.With rotating-wave approximation,we deduce the dynamics equations including second-order correlation function from the master equations of the populations and discuss the correlation function of photon emission from the exciton combination under different input pulse areas.There will appear an apparant split peak around zero time delay under strong excitation.For short pulse width,the probability of single photon emission p and the efficiency of single photon emission η oscillate as the excitation intensity increases.It is revealed that high efficient single photon emissions can be realized in this system when excited with input pulse area about π and short pulse width.