Color-tunable plasmonic device with a partially modulated refractive index

A method for creating colors in the visible spectrum using a tunable plasmonic device with a partially modulated refractive index, the method comprising:

• providing a plasmonic device with an electrically conductive bottom electrode, a first dielectric layer overlying the bottom electrode, having a refractive index non-responsive to an electric field, a second dielectric layer overlying the first dielectric layer having a refractive index responsive to an electric field, an electrically conductive top electrode overlying the second dielectric layer, and a first plasmonic layer including a plurality of discrete plasmonic particles, interposed between the top and bottom electrodes;
• accepting a full-spectrum visible light incident to the top electrode;
• accepting a first voltage potential between the top and bottom electrodes, generating a first electric field;
• and,
• supplying a first primary color in response to the first electric field, where a primary color exhibits a single wavelength peak with a spectral full width at half magnitudes (FWHMs) in the visible spectrum of light.