Transactions of the Society of Information Storage Systems (정보저장시스템학회논문집)
- Volume 4 Issue 1
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- Pages.1-5
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- 2008
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- 1738-6845(pISSN)
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- 2288-2022(eISSN)
Super Resolution Readout in Near Field Optical Data Storage System
근접장 광 기록 재생 시스템에서의 초해상 재생 현상 확인
- Lee, Jin-Kyung (Tera Storage lab, DM R&D Center, Samsung Electronics Co., Ltd.) ;
- Jeong, An-Sik (Tera Storage lab, DM R&D Center, Samsung Electronics Co., Ltd.) ;
- Shin, Jong-Hyun (Tera Storage lab, DM R&D Center, Samsung Electronics Co., Ltd.) ;
- Kim, Joo-Ho (Tera Storage lab, DM R&D Center, Samsung Electronics Co., Ltd.) ;
- Lee, Kyung-Geun (Tera Storage lab, DM R&D Center, Samsung Electronics Co., Ltd.) ;
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Kim, Joong-Gon
;
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Park, No-Cheol
;
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Park, Young-Pil
- 이진경 ;
- 정안식 ;
- 신종현 ;
- 김주호 ;
- 이경근 ;
-
김중곤
(연세대학교 정보저장기기연구센터) ;
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박노철
(연세대학교 정보저장기기연구센터) ;
-
박영필
(연세대학교 정보저장기기연구센터)
- Published : 2008.03.01
Abstract
Super-resolution near-field structure (super-RENS) technology and solid immersion lens (SIL) based near-field (NF) technology have been expected as promising approaches to increase data capacity or areal density of optical disc. Super-RENS technology has been studied until now using mainly numerical aperture (NA) of 0.85 far-field optical system and possibility of tangential data density increment have been presented. NF technology has been studied with NA over 1 and presented demonstration of removable performance. To achieve much higher density, approach to increase NA of super-RENS by NF technology (Near-Field Super-Resolution, NFSR) can be a candidate and we think this technology would be advantageous compared to wavelength reduction or much higher NA increment of NF technology or much smaller effective optical spot size reduction of far-field super-resolution technology. In this paper we present readout result of ROM media having monotone pits using NF optical system with wavelength of 405nm and NA of 1.84 surface type SIL. GeSbTe material was used for super resolution active layer and pit length is 37.5nm which is shorter than resolution limit 55nm. We present the feasibility of NFSR technology by confirming the CNR threshold according to readout power (Pr) and CNR 33dB over threshold Pr.
Keywords