Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te
Ag<sub>2</sub>Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag<sub>2</sub>Te has been studied by theoretical and experimental method...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/12/10/1469 |
| _version_ | 1827650835661717504 |
|---|---|
| author | Xin Su Yuan Gao Qi Wu Haizeng Song Shancheng Yan Yi Shi |
| author_facet | Xin Su Yuan Gao Qi Wu Haizeng Song Shancheng Yan Yi Shi |
| author_sort | Xin Su |
| collection | DOAJ |
| description | Ag<sub>2</sub>Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag<sub>2</sub>Te has been studied by theoretical and experimental methods, the plasmon resonance and stability of Co-doped Ag<sub>2</sub>Te remain elusive. Here, we theoretically report a new unconventional UV plasmon mode and its stability in Co-doped Ag<sub>2</sub>Te. Through density functional theory (DFT), we identify a deep UV plasmon mode within 15–40 eV, which results from the enhanced inter-band transition in this range. The deep UV plasmon is important for detection and lithography, but they have previously been difficult to obtain with traditional plasmon materials such as noble metals and graphene, while most of which only support plasmons in the visible and infrared spectra. Furthermore, we should highlight that the high-energy dielectric function is almost invariant under different doping amounts, indicating that the UV plasmon of Ag<sub>2</sub>Te is robust under Co doping. Our results predict a spectrum window of a robust deep UV plasmon mode for Ag<sub>2</sub>Te-related material systems. |
| first_indexed | 2024-03-09T20:24:32Z |
| format | Article |
| id | doaj.art-b0d6b2b517b64bef81ae9f2008e277d8 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T20:24:32Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-b0d6b2b517b64bef81ae9f2008e277d82023-11-23T23:39:00ZengMDPI AGCrystals2073-43522022-10-011210146910.3390/cryst12101469Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>TeXin Su0Yuan Gao1Qi Wu2Haizeng Song3Shancheng Yan4Yi Shi5School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaSchool of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaSchool of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaHenan Key Laboratory of Rare Earth Functional Materials, Zhoukou Normal University, Zhoukou 466001, ChinaSchool of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaSchool of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaAg<sub>2</sub>Te is a novel topological insulator system and a new candidate for plasmon resonance due to the existence of a Dirac cone in the low-energy region. Although the optical response spectrum of Ag<sub>2</sub>Te has been studied by theoretical and experimental methods, the plasmon resonance and stability of Co-doped Ag<sub>2</sub>Te remain elusive. Here, we theoretically report a new unconventional UV plasmon mode and its stability in Co-doped Ag<sub>2</sub>Te. Through density functional theory (DFT), we identify a deep UV plasmon mode within 15–40 eV, which results from the enhanced inter-band transition in this range. The deep UV plasmon is important for detection and lithography, but they have previously been difficult to obtain with traditional plasmon materials such as noble metals and graphene, while most of which only support plasmons in the visible and infrared spectra. Furthermore, we should highlight that the high-energy dielectric function is almost invariant under different doping amounts, indicating that the UV plasmon of Ag<sub>2</sub>Te is robust under Co doping. Our results predict a spectrum window of a robust deep UV plasmon mode for Ag<sub>2</sub>Te-related material systems.https://www.mdpi.com/2073-4352/12/10/1469Ag<sub>2</sub>Teplasmondensity functional theory |
| spellingShingle | Xin Su Yuan Gao Qi Wu Haizeng Song Shancheng Yan Yi Shi Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te Crystals Ag<sub>2</sub>Te plasmon density functional theory |
| title | Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te |
| title_full | Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te |
| title_fullStr | Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te |
| title_full_unstemmed | Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te |
| title_short | Robust UV Plasmonic Properties of Co-Doped Ag<sub>2</sub>Te |
| title_sort | robust uv plasmonic properties of co doped ag sub 2 sub te |
| topic | Ag<sub>2</sub>Te plasmon density functional theory |
| url | https://www.mdpi.com/2073-4352/12/10/1469 |
| work_keys_str_mv | AT xinsu robustuvplasmonicpropertiesofcodopedagsub2subte AT yuangao robustuvplasmonicpropertiesofcodopedagsub2subte AT qiwu robustuvplasmonicpropertiesofcodopedagsub2subte AT haizengsong robustuvplasmonicpropertiesofcodopedagsub2subte AT shanchengyan robustuvplasmonicpropertiesofcodopedagsub2subte AT yishi robustuvplasmonicpropertiesofcodopedagsub2subte |