Abstract
In this paper, we present an efficient low-pass terahertz (THz) filter design based on MEMS technology. With a cascaded arrangement of two functional meta-layers, we demonstrate a nearly loss-free response at the lower frequency passband and sharp rejection characteristics at the higher frequency stopband, with a steep roll-off of 296 dB/THz. The bandwidth of the low-pass filter is easily tuned by scaling the structural parameters of the metamaterial unit cell. The low-pass filter works efficiently even at oblique angles of incidence, making it attractive for practical applications in THz signal processing.
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