The wavelength of a representative infrared photon with an energy of 1 eV is 1240 nm. At first glance, resonance with nanoscale seems impossible. How could you get a thin film of lithium, which has been deposited on the wall of an alumina tube (a conductor juxtaposed to a dielectric) and irradiated with 1 eV photons, to absorb 81.6 eV of photonic energy, ionize and thereby force adjacent hydrogen into ground state redundancy ?
SPP is the short answer, but what is called "nano-gears" could be involved, allowing lithium atoms to absorb as if they were much larger. Quote: "nanostructure-induced interference of the evanescent-field components of the electromagnetic field may generate complex spatial distributions of the time-averaged Poynting vector in the near-field region, including creation of nanoscale vortices of optical powerflow. This mechanism of light trapping offers a new way to efficiently focus and store light.." http://arxiv.org/ftp/arxiv/papers/1405/1405.1657.pdf This paper is not about LENR and never mentions it, but nevertheless part of of it related to SPP interaction can be interpreted to offer a better explanation than any other paper available for ground state redundancy, including any by Randell Mills. Jones