@misc{indiciae51ac303a9572,
  title = {Complex optical constants on a subwavelength scale.},
  author = {R Hillenbrand and F Keilmann},
  year = {2000},
  doi = {10.1103/physrevlett.85.3029},
  url = {https://pubmed.ncbi.nlm.nih.gov/11005995/},
  note = {Source identifier: 11005995}
}