I'm considering what consequences would come from the development of hypothetical devices that could convert photons to axions at cost and power requirements accessible to governments, large businesses, and wealthier individuals. Three things come to mind:
- Stealth capabilities and observability, at the cost of not being able to communicate or see very well
- Heat management: radiant photons are now axions that hardly interact with anything at all
- Discreet communication, assuming one has a partner that can convert axions to photons
I'm curious if I'm overlooking or not understanding unintended consequences of such a technology, and also wondering what "knobs to turn" there are to make this more easily balanced. For instance, what if there was a floor or ceiling for wavelength that could be converted? If only gammas or long wavelengths could escape the device's field, for instance, that does allow some, albeit flawed, detection. This would certainly help anyone inside of such a field see out of it if they had the right instruments!
Finally, besides very intense magnetic fields, does any other process or mechanism come to mind, such as exotic metamaterials?