Improving the recording ability of a near-field optical storage system by higher-order radially polarized beams | Zendy

Yaoju Zhang | Zendy; Jianping Bai | Zendy

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Improving the recording ability of a near-field optical storage system by higher-order radially polarized beams

Author(s) -

Yaoju Zhang,

Jianping Bai

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.003698

Subject(s) - optics , beam (structure) , materials science , optical recording , light beam , lens (geology) , physics

Distributions of the optical field in a solid immersion lens recording system are calculated for higher-order radially polarized modes of the incidence. Results show that two higher-order radially polarized modes of R-TEM(11) (* )and R-TEM(21) * are useful to near-field optical recording, but further higher-order modes such as R-TEM(31) (* ), R-TEM(41) (* ), and R-TEM(51) (* ) are not useful due to the strong side-lobe intensity. Compared with R-TEM(01) (* ) beam focusing, the full width at half-maximum of the recording spot is decreased markedly and the focal depth is increased substantially by using R-TEM(11) (* )beam focusing. The effect of the beam width of the R-TEM(11) (* ) mode is also discussed.

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