Abstract
Near-field radiation transfer between pillar-array structured surfaces was investigated numerically. In the case of channels with low aspect ratios, spectral near-field radiation flux has three peaks. It was clarified that the third peak with the highest frequency was originated from an interference of SPP(surface plasmon-polariton) induced at the top surface of the pillar, while the first and the second peak with relatively lower frequency from that at the side wall surface of it.
