TY - RPRT TI - High-Efficiency Flexible Multilevel Photon Sieves by Single-Step Laser-Based Fabrication and Optical Analysis AU - Julian, Matthew N. AU - MacDonnell, David G. AU - Gupta, Mool C. PY - 2018 UR - https://ntrs.nasa.gov/citations/20190028397 ID - 20190028397 ER -