In order to generate electricity from dissipated heat that would simply fly away into
Scientists have created a rectenna, and in order to collect bothas much energy as possible, you need to use the smallest element. However, it was necessary to solve the problem of increasing resistance as the elements decrease.
Researchers talk about an element basedon the tunnel effect. This means zero electron transition resistance and a sharp increase in the output level. Researchers were able to obtain this effect after they created a gap between the transition contacts between two dielectric layers - the so-called quantum well. The selection of the gap and thickness of the dielectrics was such that the electron tunneled from one contact to another, as if passing through a wall.
Next, the authors tested an array of more than250,000 butterfly shaped rectennas made of nickel, nickel oxide, aluminum oxide, chromium and gold. They were all about 11 nm long and 6 nm wide. As a result, the design showed conversion efficiency 100-1000 times higher than previous optical rectennas.
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