Title :
Characteristics of gap-induced aberration in solid immersion lens systems
Author :
Jo, J.S. ; Milster, T.D. ; Erwin, J.K.
Author_Institution :
Opt. Data Storage Center/Opt. Sci. Center, USA
Abstract :
The induced phase changes are quantified by varying air gap width. Experiment shows the shape of the gap-induced aberration is well predicted by our simulation. The aberration is characterized by three parameters. The analyzed solid immersion lens (SIL) system is composed of SIL, gap, and substrate. The air gap induces instrumental polarization aberration due to vector thin-film effects. For larger air gaps the changes of phase increase. The astigmatic spot is explained by the increased aberration. Experiment confirms simulation at 300 nm air gap for LaSFN9 (SIL/substrate).
Keywords :
aberrations; lenses; light polarisation; optical images; optical storage; solid-state phase transformations; LaSFN9; astigmatic spot; gap-induced aberration; increased aberration; induced phase changes; instrumental polarization aberration; optical recording medium; phase change; simulation; solid immersion lens systems; substrate; varying air gap width; vector thin-film effects; Apertures; Instruments; Laser beams; Lenses; Memory; Optical films; Optical polarization; Optical recording; Solids; Transistors;
Conference_Titel :
Optical Data Storage, 2000. Conference Digest
Conference_Location :
Whisler, BC, Canada
Print_ISBN :
0-7803-5950-X
DOI :
10.1109/ODS.2000.847974
