Enabling Single-mode Behavior Over Large Areas with Photonic Dirac Points


Applications for this technology include new classes of large-area ultralow-threshold lasers, single-photon sources, quantum information processing devices, and energy harvesting systems.

Problem Addressed

Currently, all proposed realizations of a photonic analog of graphene lack fully omnidirectional out-of-plane confinement, which has prevented creating truly realistic implementations of this class of systems.


This invention proposes a novel route to achieve all-dielectric three-dimensional photonic materials featuring Dirac-like dispersion in a quasi-two-dimensional system.   The technology consists of a face-centered cubic (fcc) structure formed by alternating layers of dielectric rods and dielectric slabs patterned with holes on respective triangular lattices.  This fcc structure also includes a defect layer, which may comprise either dielectric rods or a dielectric slab with patterned holes. This defect layer introduces Dirac cone dispersion into the fcc structure's photonic band structure. 


  • A feasible approach to achieve simultaneously quasi-two-dimensional light propagation and Dirac cone dispersion in an all-dielectric 3D photonic material
  • Unique light confining properties of a proper choice of 3D layered PhCs enables the creation of extended planar defect modes whose dispersion relation exhibits isolated Dirac points inside a complete 3D photonic band-gap
  • The implementation of structures much larger than the wavelength is feasible for the first time by using the particular photonic materials