Design of an all-optical multi-logic operation-integrated metamaterial-based terahertz logic gate
Ziqun Wang, Zijing Zhang, Fu Qiu, Meng Wang, Weiguo Yang, Zhenhua Li, Xiaofei Hu, Yuanping Li, Xin Yan, Haiyun Yao, Lanju Liang
Abstract
Terahertz logic gates play a vital role in optical signal processing and terahertz digitization. Herein, a strategy to design an all-optical terahertz logic gate device composed of metamaterials with a semiconductor-metal hybrid is proposed; accordingly, a concrete logic gate composed of Ge embedded-in Au stripe supported by a Si board is presented theoretically. Simulation results reveal the dependence of the terahertz transmission spectra on the different illuminations in the device. Based on the illumination-transmission response, the designed device can realize the NOR or OR Boolean operation. The effects of the width of the Ge-Au stripe as well as the Si board on the transmission spectra and logic performance were also investigated.