In this paper,a method to excite chiral quasi-bound states in the continuum(Q-BICs)using an asymmetric interface is proposed for the first time,to our knowledge.The chirality of a metasurface can be controlled by vary...In this paper,a method to excite chiral quasi-bound states in the continuum(Q-BICs)using an asymmetric interface is proposed for the first time,to our knowledge.The chirality of a metasurface can be controlled by varying the medium of the active layer,achieving a maximum circular dichroism(CD)value of 0.9.Two types of reconfigurable chiral Q-BIC metasurfaces,a single-biased chiral Q-BIC metasurface(SBCBM)and a dual-biased chiral Q-BIC metasurface(DBCBM),are proposed,facilitated by the use of the electronically controlled material polyaniline(PANI).This enables electrically reconfigurable chiral Q-BIC with a maximum CD variability range from-0.9 to+0.9.These results highlight significant potential applications in fields such as reconfigurable devices,optical chiral switching,and environmental monitoring.展开更多
基金National Natural Science Foundation of China(61205095)。
文摘In this paper,a method to excite chiral quasi-bound states in the continuum(Q-BICs)using an asymmetric interface is proposed for the first time,to our knowledge.The chirality of a metasurface can be controlled by varying the medium of the active layer,achieving a maximum circular dichroism(CD)value of 0.9.Two types of reconfigurable chiral Q-BIC metasurfaces,a single-biased chiral Q-BIC metasurface(SBCBM)and a dual-biased chiral Q-BIC metasurface(DBCBM),are proposed,facilitated by the use of the electronically controlled material polyaniline(PANI).This enables electrically reconfigurable chiral Q-BIC with a maximum CD variability range from-0.9 to+0.9.These results highlight significant potential applications in fields such as reconfigurable devices,optical chiral switching,and environmental monitoring.
