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(Color online) (a) Transmission |S 21| and (b) group delay spectra for the metamolecule mounted in an X-band waveguide for a set of temperatures. The inset in (a) shows a photograph of the sample with the cut wire and the SRR pair. The labels A, B, and C are used to identify the three EIT resonances.
(Color online) Current densities in one arm of the SRR. (a) Results obtained using a frequency-domain electromagnetics solver. (b) Experimental LSM photo-response image. The LSM image was acquired at a frequency of 9.747 GHz, input power of +18 dBm, and a temperature of 7 K. (c) Schematic of the leftmost SRR of the sample. The dashed box indicates the area of the SRR in which the current densities are shown in (a) and (b).
(Color online) Input power dependence of (a) the transmission |S 21| and (b) the group delay in the transmission window labeled C in Fig. 1.
(Color online) Images of the LSM photoresponse in the vicinity of the interior square corner of the Nb SRR [white square in Fig. 2(b)] as a function of incident microwave power from +15 dBm to +22 dBm. The images cover an area of 100 μm × 100 μm. (Note that the EIT sample is in a different configuration while measured with the LSM technique compared to the waveguide measurements shown in Figs. 1 and 3. The incident field configurations will therefore be somewhat different, resulting in slightly different critical input powers at which the transparency window is destroyed in the two experiments.)
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