中国光学快报(英文版)
中國光學快報(英文版)
중국광학쾌보(영문판)
CHINESE JOURNAL OF LASERS
2004年
6期
356-358
,共3页
墙威%Luping Shi%Towchong Chong%曹阳
牆威%Luping Shi%Towchong Chong%曹暘
장위%Luping Shi%Towchong Chong%조양
A superlattice-like (SLL) structure was applied to phase-change optical recording. The recording layer consisting of alternating thin layers of two different phase-change materials, GeTe and Sb2Tes, were grown by magnetron sputtering on polycarbonate substrates. Land/groove optical recording was adopted to suppress crosstalk and obtain a large track density. Dynamic properties of the SLL disc were investigated with the shortest 1T pulse duration of 8 ns. Clear eye pattern was observed after 10000 direct overwrite cycles. Erasability above 20 dB was achieved at a constant linear velocity of 19 m/s. Carrier-noise ratio (CNR) kept above 46 dB when the recording frequency reaches 21 MHz. The SLL phase change optical disc demonstrates a better recording performance than the Ge1Sb2Te4 and Ge1Sb4Te7 discs in terms of CNR, erasability, and overwrite jitter.
