| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Low-Power Super-resolution Readout with Antimony Bismuth Alloy Film as Mask layer |
| JIANG Lai-Xin1, WU Yi-Qun1,2, WANG Yang1, WEI Jing-Song1,GAN Fu-Xi1 |
| 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 2018002Lab of Functional Materials, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080 |
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| Cite this article: |
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JIANG Lai-Xin, WU Yi-Qun, WANG Yang et al 2009 Chin. Phys. Lett. 26 024214 |
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Abstract Sb-Bi alloy films are proposed as a new kind of super-resolution mask layer with low readout threshold power. Using the Sb-Bi alloy film as a mask layer and SiN as a protective layer in a read-only memory disc, the super-resolution pits with diameters of 380nm are read out by a dynamic setup, the laser wavelength is 780nm and the numerical aperture of pickup lens is 0.45. The effects of the Sb-Bi thin film thickness, laser readout power and disc rotating velocity on the readout signal are investigated. The results show that the threshold laser power of super-resolution readout of the Sb-Bi mask layer is about 0.5mW, and the corresponding carrier-to-noise ratio is about 20dB at the film thickness of 50nm. The super-resolution mechanism of the Sb-Bi alloy mask layer is discussed based on its temperature dependence of reflection.
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| Keywords:
42.70.Ln
42.40.Ht
42.79.Vb
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Received: 22 October 2008
Published: 20 January 2009
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| PACS: |
42.70.Ln
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(Holographic recording materials; optical storage media)
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42.40.Ht
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(Hologram recording and readout methods)
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42.79.Vb
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(Optical storage systems, optical disks)
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