摘要
在对激子不作任何近似的条件下,对强耦合激子-声子系统中光的线性极化率进行了理论计算,证明了当信号光场频率与激子频率的失谐量等于光学声子的频率时,会出现电磁感应透明现象和超慢光效应.并且与对激子作Dyson-Maleev变换近似和玻色近似的结果进行比较,发现对激子无论是否作近似对产生电磁感应透明现象和超慢光效应都没有实质的影响.
Phonon mediated electromagnetically induced ,transparency（EIT） and ultraslow light in strongly coupled exciton-phonon systems are investigated theoretically without making any approximation for excitons. It is shown that electromagnetically induced transparency mediated by phonons and the uhraslow light can occur in such systems as the signal field detuning from the exciton frequency is exactly equal to the phonon frequency. It is further shown that the phonon mediated EIT and ultraslow light calculated by using the exact exciton model is essentially the same as the numerical results obtained using the Bose approximation or the Dyson-Maleev approximation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期1769-1773,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10274051)
上海市自然科学基金(批准号:03ZR14060)资助的课题.
关键词
量子光学
电磁感应透明
激子
声子
quantum optics, electromagnetically induced transparency, exciton, phonon
