MBE growth of high absorption mid-IR type-II InAs/GaSb superlattices
- ISSN号:1000-3290
- 期刊名称:《物理学报》
- 时间:0
- 分类:TN304.26[电子电信—物理电子学] TN304.23[电子电信—物理电子学]
- 作者机构:[1]Laboratory of Nanophotonic Functional Materials and Devices, Institute of Optoelectronic Materials and Technology, South China Normal University, Guangzhou 510631, China, [2]Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- 相关基金:This work was supported by the National High Technology Research and Development Program of China (2011AA03A112, 2011AA03A106 and 2013AA03A101), the National Natural Science Foundation of China (11204360, 61210014), the Science & Technology Innovation Program of Guangdong Provincial Department of Education of China (2012CXZD0017), the Industry-Academia-Research Union Special Fund of Guangdong Province of China (2012B091000169), and the Science & Technology Innovation Platform of Industry-Academia- Research Union of Guangdong Province-Ministry Cooperation Spe- cial Fund of China (2012B090600038).
关键词:
分子束外延生长, 锑化镓, 超晶格, 砷化铟, 中红外, 高吸收, MLS, InAs, InAs/GaSb superlatices , High absorption , Molecular beam epitaxy
中文摘要:
二种短时期的类型 II 超点阵( SL ) InAs ( 6 单层( ML )) /GaSb ( 3 ML )和 InAs ( 8 ML )能当作的 /GaSb ( 8 ML )中间红外线(米尔)察觉被分子的横梁取向附生( MBE )在p类型 GaSb 上种了( 100 )底层。为二超点阵( SL )的截止波长被发现在 4.8 附近????????????????????????????????????????吗?????????????????
英文摘要:
Two kinds of short-period type II superlattices (SLs) InAs (6 monolayers (MLs))/GaSb (3 MLs) and InAs (8 MLs)/GaSb (8 MLs) which can serve for mid-infrared (MIR) detection have been grown by molecular beam epitaxy (MBE) on p-type GaSh (100) substrates. The cutoff wavelength for the two superlattices (SLs) was found to be around 4.8 μm at 300 K. The high resolution X-ray diffraction (HRXRD) measurements indicated that the InAs (8 MLs)/GaSb (8 MLs) SLs have better crystalline quality than that of the InAs (6 MLs)/GaSb (3 MLs) SLs. How-ever, compared with infrared absorption in the 2.5-4.3μm range, the optical absorption of InAs (6 MLs)/GaSb (3 MLs) SLs was more excellent. This can be attributed to increase probability of the electron and hole wave function overlap in the thinner period thickness.