Numerical investigations were conducted of the plasmonically induced transparency (PIT) effect observed in a metal–insulator–metal waveguide coupled to asymmetric three-rectangle resonators, wherein, of the two PIT peaks that were generated, one PIT peak fell while the other PIT peak rose. PIT has been widely studied due to its sensing, slow light, and nonlinear effects, and it has a high potential for use in optical communication systems. To gain a better understanding of the PIT effect in multi-rectangle resonators, its corresponding properties, effects, and performance were numerically investigated based on PIT peak fluctuations. By modifying geometric parameters and filling dielectrics, we not only realized the off-to-on PIT optical response within single or double peaks but also obtained the peak fluctuation. Furthermore, our findings were found to be consistent with those of finite element simulations. These proposed structures have wide potential for use in sensing applications.
Plasmonically induced transparency (PIT) effect in a metal–insulator–metal waveguide coupled to asymmetric three rectangle resonators and an appearance that one PIT peak fall while the other PIT peak rise are investigated numerically. PIT is widely studied duo to the performance on sensing, slow slight and nonlinear effects, which has great potential to be applied on optical communication system. To get a better insight of PIT effect in multi-rectangle resonators, herein, PIT peaks fluctuation is employed to numerically investigate its corresponding properties, effects and performance. By modify geometric parameters and filling dielectric, not only the off-to-on PIT optical response within single or double peaks can be realized, but also the fluctuation of peaks can be achieved as well. Additionally, our findings are well consistent with finite element simulation outcomes. These proposed structures also possess great potential in both communication and sensing applications.
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