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High Lattice Match Growth of InAsSb Based Materials by Molecular Beam Epitaxy 被引量:2
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作者 任洋 郝瑞亭 +4 位作者 刘思佳 郭杰 王国伟 徐应强 牛智川 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第12期133-137,共5页
High lattice match growth of InAsSb based materials on GaSb substrates is demonstrated. The present results indicate that a stable substrate temperature and the optimal flux ratios are of critical importance in achiev... High lattice match growth of InAsSb based materials on GaSb substrates is demonstrated. The present results indicate that a stable substrate temperature and the optimal flux ratios are of critical importance in achieving a homogeneous InAsSb based material composition throughout the growth period. The quality of these epilayers is assessed using a high-resolution x-ray diffraction and atomic force microscope. The mismatch between the GaSb substrate and InAsSb alloy achieves almost zero, and the rms surface roughness of InAsSb alloy achieves around 1.7A over an area of 28μm × 28μm. At the same time, the mismatches between GaSb and InAs/InAs0.73Sb0.27 superlattices (SLs) achieve approximately 100 arcsec (75 periods) and zero (300 periods), with the surface rms roughnesses of InAs/InAs0.73Sb0.27 SLs around 1.8 A (75 periods) and 2.1A (300 periods) over an area of 20 μm×20 μm, respectively. After fabrication and characterization of the devices, the dynamic resistance of the n-barrier-n InAsSb photodetector near zero bias is of the order of 10^6Ω·cm^2. At 77K, the positive-intrinsic-negative photodetectors are demonstrated in InAsSb and InAs/InAsSb SL (75 periods) materials, exhibiting fifty-percent cutoff wavelengths of 3.8μm and 5.1μm, respectively. 展开更多
关键词 INASSB as is GaSb on in high Lattice Match Growth of InAsSb Based materials by molecular Beam Epitaxy of by
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Application of the High Molecular Water-keeping Compound Sodium Polyacrylate in Agriculture 被引量:1
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作者 Li Qingfeng,Liu Delin,Jin Longxin,and Wu Lijun Hunan Institute of Atomic Energy Application in Agriculture,Changsha 410125,China 《Hunan Agricultural Science & Technology Newsletter》 2001年第4期24-26,共3页
The properties of the high molecular water-absorbing compound sodium polyacrylate (SP) and its application in agriculture are reviewed;and its safety in application is also introduced.
关键词 sodium polyacrykte high molecular water-absorbing material agricultural application
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