Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

doi:10.1088/1674-1056/ac8732

中国物理B ›› 2022, Vol. 31 ›› Issue (11): 116801-116801.doi: 10.1088/1674-1056/ac8732

Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

Jian-Mei Li(李健梅)^1,2, Dong Hao(郝东)¹, Li-Huan Sun(孙丽欢)¹, Xiang-Qian Tang(唐向前)^1,3, Yang An(安旸)^1,3, Xin-Yan Shan(单欣岩)^1,3,†, and Xing-Hua Lu(陆兴华)^1,3,4,5,‡

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China;
3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
4 Center for Excellence in Topological Quantum Computation, Beijing 100190, China;
5 Songshan Lake Laboratory for Materials Laboratory, Dongguan 523808, China

收稿日期:2022-05-25 修回日期:2022-07-09 接受日期:2022-08-05 出版日期:2022-10-17 发布日期:2022-10-28
通讯作者: Xin-Yan Shan, Xing-Hua Lu E-mail:shanxinyan@aphy.iphy.ac.cn;xhlu@aphy.iphy.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 21961142021, 11774395, and 11727902), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB30201000), and the Beijing Natural Science Foundation, China (Grant No. 4181003).

Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

Jian-Mei Li(李健梅)^1,2, Dong Hao(郝东)¹, Li-Huan Sun(孙丽欢)¹, Xiang-Qian Tang(唐向前)^1,3, Yang An(安旸)^1,3, Xin-Yan Shan(单欣岩)^1,3,†, and Xing-Hua Lu(陆兴华)^1,3,4,5,‡

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China;
3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
4 Center for Excellence in Topological Quantum Computation, Beijing 100190, China;
5 Songshan Lake Laboratory for Materials Laboratory, Dongguan 523808, China

Received:2022-05-25 Revised:2022-07-09 Accepted:2022-08-05 Online:2022-10-17 Published:2022-10-28
Contact: Xin-Yan Shan, Xing-Hua Lu E-mail:shanxinyan@aphy.iphy.ac.cn;xhlu@aphy.iphy.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 21961142021, 11774395, and 11727902), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB30201000), and the Beijing Natural Science Foundation, China (Grant No. 4181003).

摘要/Abstract

摘要： We investigated the photon emission spectra on Ag (111) surface excited by tunneling electrons using a low temperature scanning tunneling microscope in ultrahigh vacuum. Characteristic plasmon modes were illustrated as a function of the bias voltage. The one electron excitation process was revealed by the linear relationship between the luminescence intensity and the tunneling current. Luminescence enhancement is observed in the tunneling regime for the relatively high bias voltages, as well as at the field emission resonance with bias voltage increased up to 9 V. Presence of a silver (Ag) nanoparticle in the tunneling junction results in an abnormally strong photon emission at the high field emission resonances, which is explained by the further enhancement due to coupling between the localized surface plasmon and the vacuum. The results are of potential value for applications where ultimate enhancement of photon emission is desired.

关键词: scanning tunneling microscopy, luminescence, surface plasmon, field emission resonance

Abstract: We investigated the photon emission spectra on Ag (111) surface excited by tunneling electrons using a low temperature scanning tunneling microscope in ultrahigh vacuum. Characteristic plasmon modes were illustrated as a function of the bias voltage. The one electron excitation process was revealed by the linear relationship between the luminescence intensity and the tunneling current. Luminescence enhancement is observed in the tunneling regime for the relatively high bias voltages, as well as at the field emission resonance with bias voltage increased up to 9 V. Presence of a silver (Ag) nanoparticle in the tunneling junction results in an abnormally strong photon emission at the high field emission resonances, which is explained by the further enhancement due to coupling between the localized surface plasmon and the vacuum. The results are of potential value for applications where ultimate enhancement of photon emission is desired.

Key words: scanning tunneling microscopy, luminescence, surface plasmon, field emission resonance

中图分类号: (Scanning tunneling microscopy (including chemistry induced with STM))

68.37.Ef

78.60.Fi (Electroluminescence) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

Jian-Mei Li(李健梅), Dong Hao(郝东), Li-Huan Sun(孙丽欢), Xiang-Qian Tang(唐向前), Yang An(安旸), Xin-Yan Shan(单欣岩), and Xing-Hua Lu(陆兴华). Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction[J]. 中国物理B, 2022, 31(11): 116801-116801.

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Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

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