An electronic cooling device with multiple energy selective tunnels

• A cooling device with multiple energy selective tunnels is proposed.
• The cooling device is driven by hot electrons and no bias is needed.
• The effects of the resonant levels and half widths of the tunnels are discussed.
• The optimal configuration of the cooling device is established.
• The cooling power is doubly enhanced.

A new model of the electronic cooling device with multiple energy selective tunnels is proposed. By connecting four electron reservoirs, a cold reservoir, a hot reservoir, and two reservoirs with the ambient temperature, via four suitably tuned energy selective tunnels to form a closed circuit, a steady current of electrons is driven and cooling is achieved by continuously extracting high-energy electrons from, and simultaneously injecting low energy electrons into, the cold reservoir. The performances of the cooling device varying with the resonant levels and half widths of energy selective tunnels are explored, and the optimal configuration of the cooling device is established.