Investigation of near-field imaging characteristics of radial polarization for application to optical data storage

Wan Chin Kim, No Cheol Park, Yong Joong Yoon, Hyun Choi, Young Pil Park

Research output: Contribution to journalArticle

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Radially polarized incident light can generate a more confined longitudinal electric field on a focal plane in near-field (NF) optics than focusing circularly polarized light. Using this phenomenon, it is feasible to reduce beam spot size on storage media to increase the areal density of optical data storage. A radially polarized beam generates a beam spot which is 20% more confined on the 1st surface of medium than that of circularly polarized light. However, the peak intensity of total electric field sharply decreases and its transverse component is much more dominant inside the media stack. This confirms that radially polarized optics can be a candidate not for an NF recording system but for an NF read-only memory (ROM) system. Potentially, the results could be useful to understand the effect of radial and circular polarizations inside and outside medium for various applications of NF optics.

Original languageEnglish
Pages (from-to)236-242
Number of pages7
JournalOptical Review
Issue number4
Publication statusPublished - 2007 Jul 1


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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