Cation stoichiometry optimization of SrTiO3 (110) thin films with atomic precision in homogeneous molecular beam epitaxy
文献类型：期刊论文
| 作者 | Wang, ZM ; Feng, JG ; Yang, Y ; Yao, Y ; Gu, L ; Yang, F ; Guo, QL ; Guo, JD |
| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2012 |
| 卷号 | 100期号:5 |
| 关键词 | OXIDE SUPERLATTICES POLARIZATION SURFACE GROWTH |
| ISSN号 | 0003-6951 |
| 通讯作者 | Wang, ZM: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | In order to study the interaction between molecules and photon fields, including plasmonic and external laser fields, we have carried out in situ measurements of photoluminescence (PL) from porphyrin molecules on Au substrates with and without a scanning tunneling microscope (STM) tip. Measurements were performed in a ultra-high vacuum scanning tunneling microscope chamber during irradiation by a He-Cd laser with incident power varying in the 10(-3) to 10(-7) W range. At an incident power of around 10(-7) W, the spectra depend strongly on the presence of STM tip, which is associated with STM light emission from molecules. We estimated the ratio of quantum efficiency of scanning tunneling microscope-induced light emission (STML) from molecules to PL on the basis of the STML/PL intensity ratio observed experimentally at a laser power of 7.5 x 10(-8) W, with the use of a 40 mu m laser beam diameter and an effective area of 2 nm for STML. The estimated quantum efficiency for an electron in STML is roughly 10(10) times larger than that for one photon of PL. This anomalous enhancement will be discussed on the basis of plasmon-enhanced light emission from molecules in a STM nano-cavity. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3680597] |
| 收录类别 | SCI |
| 资助信息 | 973 Program of China [2012CB921700]; Beijing Municipal Commission of Education |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34519]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, ZM,Feng, JG,Yang, Y,et al. Cation stoichiometry optimization of SrTiO3 (110) thin films with atomic precision in homogeneous molecular beam epitaxy[J]. APPLIED PHYSICS LETTERS,2012,100(5). |
| APA | Wang, ZM.,Feng, JG.,Yang, Y.,Yao, Y.,Gu, L.,...&Guo, JD.(2012).Cation stoichiometry optimization of SrTiO3 (110) thin films with atomic precision in homogeneous molecular beam epitaxy.APPLIED PHYSICS LETTERS,100(5). |
| MLA | Wang, ZM,et al."Cation stoichiometry optimization of SrTiO3 (110) thin films with atomic precision in homogeneous molecular beam epitaxy".APPLIED PHYSICS LETTERS 100.5(2012). |
入库方式： OAI收割
来源：物理研究所
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