Low terahertz-band scanning near-field microscope with 155-nm resolution
文献类型：期刊论文
| 作者 | Dai, Guangbin1,2,3; Wang, Jie1; Zhang, Xiaoxuan1; Chang, Tianying1; Cui, Hong-Liang1,3
|
| 刊名 | ULTRAMICROSCOPY
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 226页码:7 |
| 关键词 | Low terahertz-band Near-field Background scattering Antenna theory Mixer demodulation |
| ISSN号 | 0304-3991 |
| DOI | 10.1016/j.ultramic.2021.113295 |
| 通讯作者 | Dai, Guangbin(daiguang@ustc.edu.cn) ; Chang, Tianying(tchang@jlu.edu.cn) |
| 英文摘要 | We report on the design and implementation of a scattering-type scanning near-field microscope working in the low terahertz-band under ambient conditions for nanoscopic investigations of physical properties and characteristics at sample surfaces and interfaces in the microwave and millimeter wave bands. Employing a nano-tip that oscillates vertically at a frequency Omega as the antenna, and a subharmonic mixer as the receiver, and corresponding demodulation algorithms, the back-scattered light carrying tip-sample interaction information is effectively extracted, while excluding almost all of the background noises. The amplitude and phase images constructed from signals demodulated at various harmonics (n Omega, n = 1 - 4) are obtained while scanning an Au-Si step structure with the newly developed microscope, and a resolution of 155 nm (similar to lambda/20,000) has been demonstrated at the fourth harmonic frequency (4 Omega) working at 110 GHz, with signal-to-noise ratio (SNR) equal to 44.4 dB on the Au surface and 36.2 dB on the Si surface, demonstrating the power of this new instrument for micro/nano-resolution studies in the millimeter wave band. |
| 资助项目 | National Natural Science Foundation of China[61875196] ; National Key Research and Development Program of China[2017YFF0106303] |
| WOS研究方向 | Microscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000661167900002 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/13697]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Dai, Guangbin; Chang, Tianying |
| 作者单位 | 1.Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130061, Jilin, Peoples R China 2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Guangbin,Wang, Jie,Zhang, Xiaoxuan,et al. Low terahertz-band scanning near-field microscope with 155-nm resolution[J]. ULTRAMICROSCOPY,2021,226:7. |
| APA | Dai, Guangbin,Wang, Jie,Zhang, Xiaoxuan,Chang, Tianying,&Cui, Hong-Liang.(2021).Low terahertz-band scanning near-field microscope with 155-nm resolution.ULTRAMICROSCOPY,226,7. |
| MLA | Dai, Guangbin,et al."Low terahertz-band scanning near-field microscope with 155-nm resolution".ULTRAMICROSCOPY 226(2021):7. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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