When V O 2 is metallic, the absorption peaks do not split while changing V O 2 width. The M ′ 2 , M ′ 3 and M ′ 4 absorption peaks show little change in Q factors, frequencies, and absorptivities, unlike the M ′ 1 absorption peak. The electric field enhancements of all four modes are located in the two lateral Fabry-Pérot cavities on the left side of each period, as seen in Fig. 4 (b). When V O 2 is metallic, the LFPR modes in the right overlapping regions are not excited, unlike when V O 2 is i...