Liu Hanqing, Tan Jianfeng, Liu Peiguo, Bian Li-An, Zha Song
College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China.
School of Physical and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China.
Materials (Basel). 2018 Oct 19;11(10):2042. doi: 10.3390/ma11102042.
We achieve the effective modulation of coupled-resonator-induced transparency (CRIT) in a photonic crystal system which consists of photonic crystal waveguide (PCW), defect cavities, and a multilayer graphene-insulator stack (MGIS). Simulation results show that the wavelength of transparency window can be effectively tuned through varying the chemical potential of graphene in MGIS. The peak value of the CRIT effect is closely related to the structural parameters of our proposed system. Tunable Multipeak CRIT is also realized in the four-resonator-coupled photonic crystal system by modulating the chemical potentials of MGISs in different cavity units. This system paves a novel way toward multichannel-selective filters, optical sensors, and nonlinear devices.
我们在由光子晶体波导（PCW）、缺陷腔和多层石墨烯 - 绝缘体堆叠（MGIS）组成的光子晶体系统中实现了对耦合谐振器诱导透明（CRIT）的有效调制。仿真结果表明，通过改变MGIS中石墨烯的化学势，可以有效地调节透明窗口的波长。CRIT效应的峰值与我们所提出系统的结构参数密切相关。通过调制不同腔单元中MGIS的化学势，在四谐振器耦合光子晶体系统中也实现了可调谐多峰CRIT。该系统为多通道选择性滤波器、光学传感器和非线性器件开辟了一条新途径。
