Abstract

Terahertz (THz) wave, which refers to the frequencies from 0.1 THz to 10 THz, lie in the frequency gap between the infrared and microwave, have received considerable attention during the past decades. There are increasing demands for experiments in terahertz frequencies, in different areas such as biotechnology, nanotechnology, space science, security, terahertz wave communications, and plasma diagnostics. For potential applications, the functional devices, such as beam polarizers, modulators and filters, are crucial components for a terahertz system. As a dispensable device for ultrafast information processing and interconnection of terahertz wave communication, terahertz wave filter has attracted considerable attention. Transmission properties of two-dimensional microstrip structures in the terahertz regime are presented and tested. The effects of microstrip structure shape were investigated by using terahertz time-domain spectroscopy system. The results show that the designed filter exhibit excellent transmission performance such as high transmission at the central frequency, dual passbands, sharp edges, and good rejection of the sideband frequencies.

© 2012 Optical Society of America