Coherent perfect nanoabsorbers based on negative refraction
  Based on both analytical dipole model analyses and numerical simulations, we propose a concept of coherent perfect nanoabsorbers (CPNAs) for divergent beams. This concept makes use of the properties of a slab with negative refraction and small losses. The proposed CPNA device would allow focusing radiation in nanoscale regions, and hence could be applied in optical nanodevices for such diverse purposes as reading the results of quantum computation which is based on single photon qubits. 
Vasily Klimov, Shulin Sun, Guang-Yu Guo
physics.optics quant-ph