Multi-wavelengths Terahertz emitter using graphene aperiodic super-cells

Terahertz wavelengths are one of the most important parts of electromagnetic spectra with many applications. Most applicable frequencies of Terahertz spectrums are 0.5, 0.8 and 1 THz (10(12) Hz). This work first generates every of 0.5, 0.8 and 1 THz separately and then 0.5 and 0.8 THz, 0.8 and 1 THz simultaneously. The amplitudes of generated frequencies are reasonable and more than 80%. Material used in this paper is a monolayer graphene sheet with a structure of sufficient super-cells. The used monolayer graphene is corrugated with aperiodic structure. For designing aperiodic structure of monolayer graphene, Fibonacci sequence (FS) has been used. The aperiodic structure consists of metal and graphene ribbons modeled with potential barriers and potential wells, respectively. The potential barrier is a metal ribbon with applied voltage. These generated frequencies are applicable in multi-wavelength Terahertz emitters such as solidstate graphene-based Terahertz emitters.