Jia-Hao Zou

Oct 24, 2023 | opg.optica.org | Jia-Hao Zou |Hai-Feng Zhang |Jun-Yang Sui |Qi Chen

An arithmetic logic unit (ALU) based on the metastructure (MS) with coherent absorption (CA) is proposed in this Letter. The ALU can perform AND and exclusive OR logical operations at the same frequency point. So it can be regarded as an optical half-adder. By controlling the chemical potential of graphene and the phase difference of coherent electromagnetic waves (EWs), two different binary numbers are input into the ALU.

May 8, 2023 | opg.optica.org | Hai-Feng Zhang |Shuo Wang |Rui-yang Dong |Jia-Hao Zou

AbstractTo date there have been many studies on multi-channel absorbers for conventional photonic crystals (PCs). However, the number of absorption channels is small and uncontrollable, which cannot satisfy applications such as multispectral or quantitative narrowband selective filters. To address these issues, a tunable and controllable multi-channel time-comb absorber (TCA) based on continuous photonic time crystals (PTCs), is theoretically proposed.