Based on the solid-state plasma (SSP), a metamaterial analog of electromagnetically induced transparency (EIT-like) with superior properties is theoretically proposed, including tunability, a large group index, and delay-bandwidth product (DBP), polarization independence, and low-loss. By exciting different specific parts of the SSP, the EIT-like peak frequency switches from 8.518 GHz with 90.92% transmissivity in state I to 11.26 GHz with 93.76% transmissivity in state II, i.e. a 2.742 GHz shift. Meanwhile, the metamaterial has 0.679 ns or 1.314 ns group delay, 453 or 876.1 group index, and 0.422 or 1 DBP in state I or III. Additionally, the transmission curves are the same under the circular polarization waves or linear polarization waves at any angle. The low-loss feature is likewise demonstrated. Therefore, the EIT-like metamaterial has superior properties for related applications, especially in slow light, sensing, switching, and communication.

中文翻译：

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基于固态等离子体的具有优异性能的可调电磁感应透明性的理论建议

在固态等离子体（SSP）的基础上，理论上提出了电磁感应透明性（EIT状）的超材料类似物，具有优异的性能，包括可调性，大的组指数和延迟带宽乘积（DBP），极化独立性，和低损耗。通过激励SSP的不同特定部分，类EIT的峰值频率从状态I的90.92％透射率的8.518 GHz切换到状态II的93.76％透射率的11.26 GHz，即2.742 GHz偏移。同时，超材料在状态I或III中具有0.679 ns或1.314 ns的组延迟，453或876.1的组索引以及0.422或1 DBP。另外，在任何角度的圆偏振波或线性偏振波下，透射曲线都是相同的。同样显示了低损耗功能。因此，