Objętościowy, rozległy, dwuwymiarowy kryształ fotoniczny

Existence and size of photonic bandgap depends on the contrast of refractive indices of glasses used in manufacturing of the photonic crystal. For this structure contrast about 0.1 is possible to obtain. In such structures partial photonic bandgap exist, which means that photonic bandgap exists only for selected wave vectors. It can be used to shape and steer electromagnetic waves in function of wavelength change. Such commercial materials could find applications as beam splitters and couplers, wave filters, demultiplexers, low loss waveguides, and highly selective mirrors. A possibility of fabrication double glass photonic crystals is determined by a choice of pair of glasses with similar viscosity, melting temperature, thermal coefficients, and small diffusion (close to zero). Moreover glass has to be dedicated to multiple thermo-mechanical process without crystallization effects. Only glass that fulfils conditions mentioned above can be considered for such fabrications using a mosaic drawing method. In this article we described our works in manufacturing of large area (diameter in the order of 1mm) and large height photonic crystal structures - a novel material for optic applications.