Performance of pupil-filtering stepper-lens system

Fukuda, Hiroshi; Kobayashi, Yasushi; Tawa, Tsutomu; Okazaki, Shinji

doi:10.1016/0167-9317(94)00091-8

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…In principle such masks can be generated using liquid crystal spatial light modulators [33,34] and stepper lens system [35]. Naturally, the simplest way to get the super-oscillatory hot-spot is to let its constituent electromagnetic fields propagate backward to a plane and to construct the required field distribution by an appropriate continuous amplitude and phase mask.…”

Section: Solid Immersion Super-oscillatory Optical Needlementioning

confidence: 99%

Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution

Yuan¹,

Rogers²,

Roy³

et al. 2014

Opt. Express

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Heat-assisted magnetic recording (HAMR) is a future roadmap technology to overcome the superparamagnetic limit in high density magnetic recording. Existing HAMR schemes depend on a simultaneous magnetic stimulation and light-induced local heating of the information carrier. To achieve high-density recorded data, near-field plasmonic transducers have been proposed as light concentrators. Here we suggest and investigate in detail an alternative approach exploiting a far-field focusing device that can focus light into sub-50nm hot-spots in the magnetic recording layer using a laser source operating at 473nm. It is based on a recently introduced super-oscillatory flat lens improved with the use of solid immersion, giving an effective numerical aperture as high as 4.17. The proposed solution is robust and easy to integrate with the magnetic recording head thus offering a competitive advantage over plasmonic technology. Sci. Instrum. 71(8), 3111-3117 (2000). 5. X. Zhang and Z. W. Liu, "Superlenses to overcome the diffraction limit," Nat. Mater. 7(6), 435-441 (2008). 6. N. Fang, H. Lee, C. Sun, and X. Zhang, "Sub-diffraction-limited optical imaging with a silver superlens," ©2014 Optical Society of AmericaScience 308

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Section: Solid Immersion Super-oscillatory Optical Needlementioning

confidence: 99%