TERAHERTZ WAVE HARMONIZATION IN GEOMETRICALLY PATTERNED DIELECTRIC CERAMICS THROUGH SPATIALLY STRUCTURAL JOINING

摘要

Two dimensional patterns composed of dielectric ceramics were fabricated in order to control terahertz (THz) waves effectively by using a micro-stereolithography. In this process, the photosensitive resin paste with titania particles dispersion was spread on a substrate with 10 μm in layer thickness by moving a knife edge, and two-dimensional images of UV ray were exposed by using digital micro-mirror device (DMD) with 2 μm in part accuracy. Through the layer by layer stacking process, the periodic structures composed of micro polygon tablets were successfully formed. The electromagnetic wave properties of these samples were measured by using a terahertz time domain spectroscopic (TDS) device. Forbidden band formations in transmission spectra and localization behaviors in the dielectric micro patterns were observed in the THz wave frequency range. And, the electric field profiles of localized modes were calculated by using transmission line modeling (TLM) of a finite difference time domain (FDTD) method.