ALEXANDRIA, Va., June 19 -- United States Patent no. 12,332,405, issued on June 17, was assigned to Purdue Research Foundation (West Lafayette, Ind.).

"Systems and methods for single-photon emission" was invented by Vladimir M. Shalaev (West Lafayette, Ind.), Alexandra Boltasseva (West Lafayette, Ind.), Alexei Lagutchev (West Lafayette, Ind.), Alexander Senichev (West Lafayette, Ind.), Zachariah O. Martin (West Lafayette, Ind.), Demid Sychev (West Lafayette, Ind.), Samuel Peana (West Lafayette, Ind.), Xiaohui Xu (Lafayette, Ind.), Omer Yesilyurt (West Lafayette, Ind.) and Vahagn Mkhitaryan (West Lafayette, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A photon emitter includes a multi-layer film. The m...