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Plasmon-induced transparency (PIT) effect is an important optical phenomenon in plasmonic structures. In this paper, we design a plasmonic structure to realize the manipulation of PIT simply by varying the angle of the ellipse. It consists of a single hexagonal resonator inserting a rotatable ellipse coupled with the metal–insulator–metal (MIM) waveguide. According to the temporal coupled-mode theory,...
The time-delay (TD) signature of the chaotic signal is an essential factor for eavedroppers and attackers to reconstruct the secure communication system. Based on three-cascaded vertical-cavity surface-emitting lasers (VCSELs) for TD signature suppression, we propose a novel long-distance secure communication system. We analyze the influence of the feedback time (i.e., the TD signature) on the security...
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