Systems and methods for implementing selective electromagnetic energy filtering objects and coatings using selectably transmissive energy scattering layers

A concealable sensor, comprising:

• an electromagnetic energy filtering structure for concealing a sensor, comprising:
• an energy scattering layer, comprising a plurality of substantially-transparent metallic particles and a substantially-transparent matrix material that fixes the particles in a layer arrangement to form the energy scattering layer, the energy scattering layer having an energy-incident surface and an opposite surface;
• a power source that generates an electrical field;
• refractive indices of at least some of the plurality of substantially-transparent metallic particles fixed in the substantially-transparent matrix material being modified between a first mode and a second mode when subjected to the electrical field, via plasmon resonance;
• wherein portions of the energy scattering layer are configured to allow at least one first determined wavelength of electromagnetic energy to pass through the portion of the energy scattering layer subjected to effects from the generated electrical field, and to simultaneously cause at least one second determined wavelength of electromagnetic energy to be to be scattered;
• and
• a sensor disposed so as to receive said at least one first wavelength of electromagnetic energy impinging on said energy-incident surface and passing therethrough, after said first wavelength of electromagnetic energy has passed through said energy-incident surface;
• wherein said sensor is defined as being selected from the group consisting of a camera and a photovoltaic cell.