Device, system, and method for selectively tuning nanoparticles with graphene

A method of filtering color by way of a graphene device, comprising:

• providing the graphene device, the providing of the graphene device comprising:
• providing a graphene structure responsive to continuous in-situ electrical gate-tuning of a Fermi level thereof;
• and
• providing a plurality of nanoparticles disposed adjacent the graphene structure, the plurality of nanoparticles included in a plurality of groups, each of the plurality of groups associated with a respective bandgap from a plurality of distinct energy bandgaps, the nanoparticles in each group of the plurality of groups having the respective bandgap for the group, and the nanoparticles in each group of the plurality of groups configured to activate and deactivate in response to a position, from the continuous in-situ electrical gate-tuning, of the Fermi level of the graphene structure relative to the respective bandgap for the group;
• continuously in-situ electrical gate-tuning the graphene structure by an externally applied gate bias;
• and
• activating and deactivating the nanoparticles in response to the continuously in-situ electrical gate-tuning of the Fermi level of the graphene structure by the externally applied gate bias, thereby filtering color.

A device for filtering light, comprising:

• a graphene layer having a Fermi level;
• a gate layer for applying a voltage bias between the gate layer and the graphene layer;
• a dielectric layer between the gate layer and the graphene layer, wherein the Fermi level in the graphene layer depends on an internal electric field conveyed through the dielectric layer in response to the voltage bias applied between the gate layer and graphene layer;
• and
• a plurality of nanoparticles disposed adjacent the graphene layer with each of the nanoparticles having a respective bandgap, wherein a photon absorption across the respective bandgap of each of the nanoparticles is activated when the Fermi level of the graphene layer is within the respective bandgap, and the photon absorption across the respective bandgap of each of the nanoparticles is deactivated when the Fermi level of the graphene layer is above the respective bandgap,
• wherein the plurality of nanoparticles are included in a plurality of element groups of a color array, and the plurality of element groups are included in a plurality of color groups of the color array, each color group of the plurality of color groups including the nanoparticles included in each of the element groups included in the color group;
• each color group of the plurality of color groups is associated with a respective shared bandgap from a plurality of distinct energy bandgaps, and the respective bandgap of the nanoparticles included in the color group is the respective shared bandgap of the color group;
• and
• each nanoparticle of the plurality of nanoparticles becomes relatively absorbing of the light having a wavelength corresponding to the respective bandgap of the nanoparticle when the photon absorption across the respective bandgap of the nanoparticle is activated, and each nanoparticle of the plurality of nanoparticles becomes relatively transparent to the light having the wavelength corresponding to the respective bandgap of the nanoparticle when the photon absorption across the respective bandgap of the nanoparticle is deactivated.