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Transmittance versus wave number in a 2D photonic crystal of intrinsic InSb cylinders forming a square lattice in air. The lattice constant is and the filling fraction is . E-polarized light is assumed to propagate in the direction. The thin line is the transmittance through five rows of the perfect PC. The heavy line is obtained by replacing the middle row by cylinders whose radii are 0.4 of the nominal host value. As the temperature increases from , through , the transmission peak is seen to shift to greater wave numbers. At the same time, absorption gradually lowers its height and makes it wider.
As in Fig. 1 (thick line) for a fixed wave number ; the transmittance is tuned by changing the temperature. The transmittance peaks at and relatively small shifts from this value cause a large decrease in the transmittance.
As in Fig. 1 for extrinsic Si cylinders; the lattice constant now is . The tuning is done by changing the density of injected charge N. Panel (a) shows the spectrum obtained for a defect row of cylinders with radii equal to 0.2 of the host value and . Parts (b) and (c) summarize, respectively, the tuning of the peak position with its width and height as function of N.
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