Is there agreement that an optical rectena designed for ambient thermal infra red will absorb heat directly from its environment? This agreement will force its subjects out of the Second Law paradigm. The Second Law is one of the largest paradigms in science. There may be many advantages to civilization in the new paradigm beyond the Second Law where heat can be completely recycled.
The diode array is different than an optical rectena. The diode array uses random electronic motions at frequencies much lower than ambient IR. Nevertheless the power density by area is higher than ambient IR for very small circuit elements. The diode array is simple in that it can use unregistered fabrication. The thinness of the embedded buckyball layer requires attention however.
Aloha, Charlie
