Fig. 1. (a) Unit cell with three spheres on the same plane in triangular configuration. (b) Overview schematic of the designed structure.

Fig. 2. Reflection and absorption spectra.

Fig. 3. (a) Electric field for wavelength of 623.29 nm. (b) Magnetic field for wavelength of 623.29 nm. (c) Electric field for wavelength of 550.38 nm. (d) Magnetic field for wavelength of 550.38 nm. The external electric applied is V=160  V, and the dielectric refractive index is no=2.38.

Fig. 4. Reflection and absorption spectra for different nanosphere radius: (a) 5 nm; (b) 12 nm; (c) 15 nm; and (d) 20 nm.

Fig. 5. Absorption and reflection versus wavelength for different dielectric thickness: (a) 60 nm; (b) 70 nm; (c) 75 nm; (d) 80 nm.

Fig. 6. (a) Absorption and (b) reflection to incident angle.

Fig. 7. (a) Optical spectra produced by the variation of applied voltage. (b) Optical spectra produced by applied voltage.

Fig. 8. Optical spectra for wider voltage range.

Fig. 9. Wavelength versus voltage.