2018 Fiscal Year Annual Research Report
Light - matter interaction in new atomic layer material
| Project/Area Number |
18J10199
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| Research Institution | Tohoku University |
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Principal Investigator |
UKHTARY MUHAMMAD SHOUFIE 東北大学, 理学研究科, 特別研究員(DC2)
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| Project Period (FY) |
2018-04-25 – 2020-03-31
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| Keywords | light-matter interaction / surface plasmon / optical absorption / light propagation / spin of light / graphene / carbon nanotube |
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| Outline of Annual Research Achievements |
My research topic is the light-matter interaction in new emerging atomic layer material (新規原子層物質における光と物質相互作用), especially I focus on the plasmon and on the propagation of light in solid. During the first year of my JSPS employment, I published several papers as follows:
(1) Quantum description of surface plasmon: I explained the excitation of plasmon in graphene by using light by quantizing the light (photon) and plasmon and calculating the interaction between them. (Physica Status Solidi b, 1800181 (2018)). (2) Plasmon in carbon nanotubes: We discuss the origin of peak in absorption spectra when the carbon nanotube is doped. The peak comes from the excitation of plasmon oscillating around the tube axis. (Phys. Rev. B, 99, 075403-1-13, (2019)). (3) Enhancement of electric field of light in dielectric multilayers: We derive the analytic formula for the enhancement of electric field of the light and the group velocity of light propagating through a sequence of dielectric media (Phys. Rev. Applied 10, 064015-1-14, (2018)). (4) Enhancement of electric field for Raman spectroscopy: We apply the technique in the previously mentioned paper to explain the enhancement of Raman intensity in the experiment of Raman spectroscopy of TMD-hBN heterostructure. (IEEE Transactions on Electron Devices 65, 4509 (2018)). (5) Optical absorption by near field electro-magnetic wave: We discussed non-vertical optical transition of an electron in the k-space by the near field that is generated by a metallic tip. (J. Phys. Condensed Matter 31, 265701 (2019)).
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
During this period, I involved in many different projects (within the same main topic), attended 1 international conference and published 5 papers, which are more than I expected. Most of the projects were in collaboration with other researchers outside Japan (two of them are visiting researchers in our lab). It was very good experience to have collaboration and discussion with foreign researchers. This is the reason, why I believe my status is more than what I expected.
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| Strategy for Future Research Activity |
For the second year of this project, we will focus on the following points:
1. During the first year of this project, we learnt that the surface plasmon can be localized along the edge of graphene, which is know as edge plasmon. We found that the current on graphene induced by the edge plasmon is rotating as a function of time. Therefore, we predict that the radiation coming from the induced current has circular polarization. We are now in the process of calculation and we plan to write paper about this topic.
2. We will study the propagation of light through the topological insulator and the Weyl semimetal. These topological matters have intriguing, optical properties such as anisotropy of their dielectric tensor due to the anomalous Hall effect and the optical nonreciprocity. We predict interesting phenomena might appear due to those intriguing properties, such as the negative refraction.
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[Journal Article] Understanding Interlayer Coupling in TMD-hBN Heterostructure by Raman Spectroscopy2018
Author(s)
L. Ding, M. S. Ukhtary, M. Chubarov, T. H. Choudhury, F. Zhang, R. Yang, A. Zhang, J. A. Fan, M. Terrones, J. M. Redwing, T. Yang, M. Li, R. Saito
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Journal Title
IEEE Transactions on Electron Devices
Volume: 65
Pages: 4059～4067
DOI
Peer Reviewed / Int'l Joint Research
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