@article{oai:kitami-it.repo.nii.ac.jp:00006976, author = {J., Yan and K., Maekawa and J., Tamaki and T., Kuriyagawa}, issue = {10}, month = {Aug}, pages = {1925--1931}, title = {Micro grooving on single-crystal germanium for infrared Fresnel lenses}, volume = {15}, year = {2005} }