Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution
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 r...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/103928 http://hdl.handle.net/10220/19412 |
| _version_ | 1826113291295916032 |
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| author | Yuan, Guanghui Roy, Tapashree Shen, Zexiang Rogers, Edward T. F. Zheludev, Nikolay I. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Yuan, Guanghui Roy, Tapashree Shen, Zexiang Rogers, Edward T. F. Zheludev, Nikolay I. |
| author_sort | Yuan, Guanghui |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T03:20:47Z |
| format | Journal Article |
| id | ntu-10356/103928 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:20:47Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1039282020-03-07T12:34:53Z Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution Yuan, Guanghui Roy, Tapashree Shen, Zexiang Rogers, Edward T. F. Zheludev, Nikolay I. School of Physical and Mathematical Sciences Physics & Applied Physics 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. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2014-05-20T07:32:45Z 2019-12-06T21:23:18Z 2014-05-20T07:32:45Z 2019-12-06T21:23:18Z 2014 2014 Journal Article Yuan, G., Rogers, E. T. F., Roy, T., Shen, Z., & Zheludev, N. I. (2014). Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution. Optics Express, 22(6), 6428-6437. 1094-4087 https://hdl.handle.net/10356/103928 http://hdl.handle.net/10220/19412 10.1364/OE.22.006428 en Optics express © 2014 Optical Society of America. |
| spellingShingle | Physics & Applied Physics Yuan, Guanghui Roy, Tapashree Shen, Zexiang Rogers, Edward T. F. Zheludev, Nikolay I. Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title | Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title_full | Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title_fullStr | Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title_full_unstemmed | Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title_short | Flat super-oscillatory lens for heat-assisted magnetic recording with sub-50nm resolution |
| title_sort | flat super oscillatory lens for heat assisted magnetic recording with sub 50nm resolution |
| topic | Physics & Applied Physics |
| url | https://hdl.handle.net/10356/103928 http://hdl.handle.net/10220/19412 |
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