Apparatuses and devices for absorbing electromagnetic radiation, and methods of forming the apparatuses and devices

A device, comprising:

• a photonic nanostructure comprising a plurality of discrete photonic nanobars disposed on a substrate, the plurality of discrete photonic nanobars comprising:
• variable lengths extending horizontally along the substrate;
• and
• widths and heights that are smaller than a minimum length of the variable lengths, wherein:
• the widths and variable lengths of neighboring discrete photonic nanobars within a same row and within a different, adjacent row are separated by trenches formed adjacent each lateral side of the discrete photonic nanobar;
• and
• the plurality of discrete photonic nanobars is configured to absorb light of a plurality of different wavelengths within an excitation wavelength range proportional to the variable lengths.

A method for forming a photonic nanostructure on a substrate, the method comprising:

• forming a plurality of first discrete photonic nanobars comprising each of a width and a height
• that are smaller than a length of discrete photonic nanobars of the plurality of first discrete photonic nanobars, wherein the length extends horizontally along the substrate;
• forming a plurality of second discrete photonic nanobars comprising each of a width and a height that are smaller than a length of discrete photonic nanobars of the plurality of second discrete photonic nanobars, wherein the lengths of the discrete photonic nanobars of the plurality of first discrete photonic nanobars are different from the lengths of the discrete photonic nanobars of the plurality of second discrete photonic nanobars;
• and
• forming a plurality of trenches adjacent each lateral side of the neighboring discrete photnic
• naobars within a same row and within a different, adjacent row.