Abstract-Tunable terahertz broadband absorber based on a composite structure of graphene multilayer and silicon strip array

Zhaocheng Zhai,  Le Zhang,  Xiangjun Li,  Sanshui Xiao,




https://www.sciencedirect.com/science/article/abs/pii/S0030401818307983

We propose a terahertz broadband absorber composed by silicon strips with continuous graphene on top of a metal mirror. The simulation results show that under the combined effect of the Fabry–Perot resonance and the dipole mode oscillation excited in the silicon strip array interacting with graphene, this structure can achieve an ultra-wide absorption band from 0.73 to 1.95 THz with absorbance of 90%. By changing the size of the silicon strips or the Fermi level of graphene, the working band of the absorber can be tuned.

Abstract- Terahertz Bandpass Filter Based on Frequency Selective Surface

Jiu-Sheng Li,  Yang Li,   Le Zhang,

http://ieeexplore.ieee.org/document/8194866/


We designed a terahertz bandpass filter based on double-layer frequency selective surface. Details of the proposed terahertz wave filter design and of the related parametric analysis are presented and discussed. The proposed terahertz filter was fabricated by laser technology. The transmission spectrum was characterized by terahertz time-domain spectroscopy. The results show that the center frequency of the terahertz filter is about 1 THz with 3-dB bandwidth of 400 GHz.