| 초록 |
Dielectric structures are candidate of metamaterials, as they have lower optical losses of energy than metal structures. Honeycomb structure is a non-Bravais lattice, and it has Dirac points at K and K' points. In this research, honeycomb structure which composed of silica nanoparticles is fabricated by convective assembly on the patterned sumbstrate in the large area. In the optical measurement, we can see same tendency about photonic band structure of simulation data and reflectance spectrum of experimental data. In addition, from simulation data, we can control the position of Dirac points by controlling the height of polystyrene pattern. This research demonstrates the applicability of photonic topological insulator about dielectric honeycomb structure. Photonic topological insulator has conduction state on the surface, and insulator state in the bulk, so it can transport photons without energy loss. They have applications like optical computers and optical communication. |
