In short, please provide me with a scientifically plausible biochemical scheme for how an organism can harness the energy of long-wavelength electromagnetic radiation to produce food for itself. Thank you.
Requirements of the answer:
- The organism in question should synthesize energetic compounds using the energy of incident electromagnetic waves with wavelengths over 1 mm (i.e. microwave or radio waves). It should not utilize anything with a shorter wavelength, but it's okay if the organism can only utilize a narrow wave band within that range.
- Such a "long-wavelength photosynthesis" process must be able to happen at room temperature and in the earth's atmosphere. But the chemical compounds involved in the process do not need to be compatible with the biochemistry of life on earth.
- The organism in question should be able to handle 1000 W/m2 of incident radiation (equivalent to intense sunlight at noon). However, it doesn't need to be too efficient in terms of energy. I expect it to convert at least 6% of the total energy of incident photons that are within the wave band it can utilize. (That is lower than the corresponding efficiency of chlorophyll, which is about 9%.)
- The organism in question is unable to form any delicate macroscopic shapes. (You can imagine it like sponges or lichens.) So it can not grow large parabolic antennas or parts of heat engines. But it can grow to a few centimetres thick.
Note: This question is not asking about how to form an environment that is abundant in microwave and radio waves, and it is not asking about how the organism in question could have evolved.
Link to the opposite question: Photosynthetic life using gamma radiation