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(Color online) (a) Unit cell of the CMM, which consists of two components: (b) MDM-C and (c) MDM-S. The dimensional parameters are (in microns): a = 95, b = 2.5, h = 13, l = 55, w = 15, g = 4, and d = 38. (d) OM image and whole sample of the fabricated broadband THz bandpass filter based on the CMM.
(Color online) Transmission spectrum of the broadband THz bandpass filter based on the CMM derived from the measurement (red triangles) and the simulation (blue solid line). The measured (black circles) and simulated (green dashed line) transmissions of a bare PET film are also included in the same spectrum.
(Color online) Simulated transmission (red solid lines) and reflection (blue dotted lines) spectra of (a) MDM-C, (b) MDM-S, and (c) the CMM. For all of the structures, the PET films were assumed lossless and d = 10 μm.
(Color online) Simulated induced-surface-current distributions of (a) MDM-C, (b) MDM-S, and (c) the CMM at their respective resonant frequencies.
(Color online) Transmissions of the CMM as adjusting the individual dimensional parameters from d to w [(a) to (d)] accordingly. In each step, the adjusted parameter referred to the black solid line would be substituted into the next generation to develop a high-profile dualband THz bandpass filter. The final result is shown in the black curve in Fig. 5(d).
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