Author Affiliations
Abstract
1 School of Electronics Information, Wuhan University, Wuhan 430072
2 Data Storage Institute, Singapore, DSI Building, 5 Engineering Drive 1, Singapore 117608
3 1School of Electronics Information, Wuhan University, Wuhan 430072
4 2Data Storage Institute, Singapore, DSI Building, 5 Engineering Drive 1, Singapore 117608
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 Sb2Te3, 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.
210.0210 optical data storage 210.4590 optical disks 210.4770 optical recording 160.4670 optical materials Chinese Optics Letters
2004, 2(6): 06356
本文给出了两种测量双轴晶衬底上双轴晶单晶膜的折射率和膜厚的方法及测量的公式.我们利用这种方法测量了所研制的KTP光波导薄膜层的折射率和膜厚.
椭圆偏振测量 双轴晶 光率体
