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This paper presents a dual-band band-pass filter with a ring resonator and arrow-shaped defected ground structures (DGS). The two frequency bands are generated by the ring resonator and the two arrow-shaped defected ground structures are used to realize microstrip lines with high impedance to control the two frequency bands conveniently. In order to validate the simulation, a microstrip dual-band...
We present a self-consistent approach for simulations of metallic metamaterials coupled to the gain materials. An artificial source is introduced to simulate the spontaneous emission process in the quantum dots. Using a four-level gain system, we show numerically the losses of metamaterial can be compensated by the gain, and the hybridizing quantum dots with plasmonic metamaterial can lead to a multi-fold...
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