3D Direct Laser Writing Petabyte Optical Disk

Elsevier Optics & Laser Technology has published an article written by E. Pavel, Storex Technologies, Bucharest, Romania, S.I. Jinga, B.S. Vasile, Faculty of Applied Chemistry and Materials Science, ‘Politehnica’ University of Bucharest, Romania, A. Dinescu, National Institute for R&D in Microtechnologies, Bucharest, Romania, R. Trusca, METAV R&D, Bucharest, Romania, and N. Tosa, National Institute for R&D of Isotopic and Molecular Technologies, Cluj-Napoca, Romania.

Schematic diagram of the dynamic tester
and (b) structure of the mul- tilayer optical disk

Abstract : We report novel results for 3D recording of an optical disk with ultra-high density. Multilayer 5 nm nanomarks were experimentally obtained by using fluorescent photosensitive glass-ceramics and an optical head with λ=650 nm and NA=0.60. The distance between adjacent 5 nm nanomarks has been reduced to 10 nm. Ultra-high density optical data is recorded by focusing laser beam of a CW laser diode operating at low power (P_max=10 mW).