3 topological phase transition method of three dimensional topological insulator using ultrafast terahertz field modulation

摘要

The present invention provides a three-dimensional phase insulator material Dimensional phase insulator to modulate the spectrum of the terahertz wave passing through the material by varying the degree of coupling between the level of the metallic characteristic of the phase insulator surface and the bulk of the phonon resonance, Wherein the energy level of the surface (yellow) is a metallic property (TSS (topological surface state)), and the bulk of the internal surface is an indium (III) phase insulator material having an insulator or a phase insulator. (FR) may be asymmetrically generated by interactions or interference between a first response of terahertz generated in the bulk and a second response of terahertz generated in the metallic characteristic portion by adding In .;