Figure 10
From: Tunable multichannel Fibonacci one-dimensional terahertz photonic crystal filter

Variation of central frequency of all three optical channels with respect to Fermi energy for TM polarization state under normal incidence in the third-order F-1D PhC structure corresponding to period number \(N=4\). The central frequencies of all three optical channels are shown in green, blue and magenta and changes from \({(f}_{1}, {f}_{2}, {f}_{3})=(5.606, 5.664, 5.738)\)Â THz at \({E}_{F}=60\)Â meV to \({(f}_{1}, {f}_{2}, {f}_{3})=(7.279, 7.307, 7.341)\)Â THz at \({E}_{F}=80\)Â meV.