A solid immersion lens combined with a conical dielectric tip exhibits good resolution and efficiency in reading and recording data marks on optical storage media. We demonstrate a combination aperture that produces ~200-nm full-width 1/e2 spot size and achieves 50% optical efficiency in an edge-scan experiment. A comparison of recording with the combination aperture, with an unmodified solid immersion lens, and with a far-field system is made.
© 2001 Optical Society of America
(180.5810) Microscopy : Scanning microscopy
(210.0210) Optical data storage : Optical data storage
(210.4810) Optical data storage : Optical storage-recording materials
(260.1960) Physical optics : Diffraction theory
Shu-Guo Tang, Tom D. Milster, J. Kevin Erwin, and Warren L. Bletscher, "High-performance readout and recording by a combination aperture," Opt. Lett. 26, 1987-1989 (2001)