Advanced Phase Change Media for Blue Laser Recording of 18 GB Capacity for 0.65 Numerical Aperture and 30 GB Capacity for 0.85 Numerical Aperture

Autor:	Akihito Ogawa, Naoki Morishita, Keiichiro Yusu, Naomasa Nakamura, Noritake Oomachi, Katsutaro Ichihara, Sumio Ashida
Rok vydání:	2003
Předmět:	Blue laser Materials science Physics and Astronomy (miscellaneous) business.industry Recording layer General Engineering General Physics and Astronomy Laser law.invention Numerical aperture Phase change Optics law Advanced phase Control layer Absorption (electromagnetic radiation) business
Zdroj:	Japanese Journal of Applied Physics. 42:858-862
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.42.858
Popis:	We attempted to improve phase change media to achieve larger capacity for systems with blue lasers using numerical apertures (NA) of both 0.85 and 0.65. It was found that the Bi-added GeTe-rich pseudo-binary composition promised high erase ratio even when we did not use any interface layers on a recording layer. The use of an absorption control layer (ACL) was also attempted to suppress the cross erase (XE). It was found that the ACL was very effective in suppressing the XE. The advanced phase change media that used the above novel technologies showed good analog performance. The advanced media also showed bER of less than 1.0×10-4, promising 18 GB capacity for an NA of 0.65 and 30 GB capacity for an NA of 0.85.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dfd28d9f1dd37b2837a2269145a85597 https://doi.org/10.1143/jjap.42.858 Zobrazit plný text záznamu