摘要
In this article,we investigate the phenomenon of coherent perfect absorption(CPA)with bulk Dirac semimetal(BDS)thin film.CPA of BDS appears at the frequency of 43.89 THz with 0°phase modulation of two coherent input lights.Meanwhile,it shows that CPA can be realized under oblique incidence circumstances for both TM and TE polarizations.Moreover,the frequency of CPA can be adjusted by altering the thickness of BDS thin film,and the dynamic regulation of CPA can be realized by changing the Fermi energy.Finally,the peak coherent absorption frequency can be controlled by changing the degeneracy factor.
作者
伍计鹏
唐杰
曾荣周
戴小玉
项元江
Jipeng Wu;Jie Tang;Rongzhou Zeng;Xiaoyu Dai;Yuanjiang Xiang(School of Physics and Electronics,Hunan University,Changsha 410082,China;College of Traffic Engineering,Hunan University of Technology,Zhuzhou 412007,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
基金
supported by the National Natural Science Foundation of China(Nos.61875133 and 11874269)
the Science and Technology Project of Shenzhen(Nos.JCYJ20190808143801672,JCYJ20190808150803580,JCYJ20180305125036005,JCYJ20180305124842330,and JCYJ20180305125443569)
the Natural Science Foundation of Guangdong(No.2018A030313198)。
