Terahertz wave omnidirectional dielectric mirror

We design an omnidirectional dielectric mirror that operates over a wide terahertz wavelength range and is based on a periodic bilayer (tellurium and polystyrene) structure. The structure is characterized by using transfer matrix calculation. Results of simulation show that the presented dielectric mirror is highly reflecting for all incidence angles and TE as well as TM polarization in the frequency band from 0.451 to 0.821 THz (i.e. wavelength ranges from 365.5 to 665.5 μm), when the incidence angle is less than 45°. Tolerance analysis reveals a large tolerance to fabrication errors.