石墨烯为代表的Dirac量子体系，具有极高的电子迁移率。然而，石墨烯带隙为0，场效应管的开关比较小，从而限制了其应用。对此，本项目将利用时域有限差分方法研究Dirac量子体系中的类光输运行为，类比集成光路，设计可集成的新颖类光输运器件，探讨利用类光输运而不是传统场效应管来构建集成回路。具体的研究内容包括：类比集成光路中的光波导和光子晶体，研究类光波导、类光子晶体中电子、自旋、赝自旋的能带结构和输运行为；外加电场、光场、应力场（赝磁场）、磁场等对类光波导、类光子晶体中输运行为的调控作用，特别是对载流子输运时间的调控作用，并探讨基于输运时间而不是透射率的可集成回路；研究类光波导、类光子晶体中超慢电子、自旋、赝自旋，探讨利用超慢载流子实现缓存和存储器件。

Dirac quantum system such as the graphene, has a very high electron mobility. However, the band gap of graphene is zero. The on-off ratio of graphene field-effect transistor is small, which limits its application. In this project, the light-like carriers transport in Dirac quantum system is studied by using the finite difference time domain method. By analogy with the integrated optics, we can design the integratable light-like devices. We will build the integrated circuits by using light-like transport rather than traditional field-effect transistor. In this project, by using the same routine as the optical waveguide and photonic crystal in integrated optics, we will explore the electron, spin, and pseudospin band structure and transport in the light-like waveguide and photonic crystal. We will study the influence of the external electric field, light field, stress field (pseudo-magnetic field), and magnetic field on the light-like transport in the light-like waveguide and photonic crystal. Especially, we will investigate how the external field affect the carriers transport time, and build the integrated circuits based on the transport time rather than the transmittance of traditional field-effect transistor. We will also investigate slow electron, spin, and pseudospin in the light-like waveguide and photonic crystal, and design the buffer and storage devices based on the slow carriers.