Fig. 3

a–c The symmetry-breaking process of the plasmonic metasurface shown in Fig. 2c. d The reflection spectra of the plasmonic metasurface with various ∆d at the wavelength range of 1100–1800 nm. e The reflection spectrum of the plasmonic metasurface with ∆d = 0 at the wavelength range of 1550–1800 nm. f The reflection spectra of the plasmonic metasurface with various ∆d at the wavelength range of 1550–1800 nm. g The reflection spectra of the plasmonic metasurface with various ∆d = 92 nm and the all metal structure at the wavelength range of 1100–1800 nm, respectively