--- Horace Heffner wrote: > The good news is that *gaps* between superconductors can be used to generate radiation by imposing a potential across the gap. Unfortunately, the gap must be small enough that electrons can tunnel back and forth...
Thanks for that information. This is encouraging... especially for generation of terahertz radiation, which passes through just about anything (including presumably the HTSC itself), consequently the "gaps" themselves would not necessarily need to be exposed or oriented to the preferred emission plane, leaving open the possibility of simply stacking (by electroplating?) many layers of HTSC alternating with thin layers of oxide insulation... and without any need for micro-lithography... Magnesium boride comes to mind as just a candidate HTSC - if that is, boron is platable (it forms an acid so why not?)... Jones
