Optically transparent glass frequency absorber

A device comprising:

• a substrate comprising a glass material, the glass material having a dielectric constant no greater than 3.0, and the substrate including a first surface and a second surface disposed opposite the first surface;
• a first layer of metal disposed on the first surface according to a first pattern that includes a number of elements, wherein:
• individual elements of the number of elements including a plurality of structures;
• the plurality of structures include an outer structure and an inner structure disposed within the outer structure;
• the outer structure has a rectangular shape with individual sides of the outer structure each including a notched region, wherein the notched region includes a first sidewall, a second sidewall disposed opposite the first sidewall, and a base connecting the first sidewall and the second sidewall, the base being disposed substantially perpendicular to the first sidewall and the second sidewall;
• the inner structure has a rectangular shape with individual sides of the inner structure including an additional notched region having a first additional sidewall, a second additional sidewall disposed opposite the first additional sidewall, and an additional base connecting the first additional sidewall and the second additional sidewall;
• dimensions of the inner structure corresponding to dimensions of the outer structure and being reduced by a scaling factor;
• and
• a range of frequencies of electromagnetic radiation absorbed by the device corresponds to a length of the base of the notched region in relation to a length of a side of the outer structure and to an additional length of the additional base in relation to an additional length of a side of the inner structure;
• a second layer of the metal is disposed on the second surface according to a second pattern that is different from the first pattern, wherein the second pattern comprises a grid;
• and
• lines of the first pattern and the second pattern have a width of no greater than 10 micrometers,
• wherein the first pattern and the second pattern are configured to cause the device to have an optical transparency of at least 80% and to have an amount of absorption of a range of frequencies of electromagnetic radiation having a target range of frequencies from 20 GHz to 45 GHz of at least 85% by causing the electromagnetic radiation to resonate and become trapped within the substrate.