Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films
Terahertz (THz) time-domain spectroscopy (TDS) is a powerful tool used to characterize the surface/interface of materials, and semiconductor/metal interfaces can generate THz emission through ultrafast optical excitation, which can be further improved through the optical excitation of surface plasmo...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/2/290 |
| _version_ | 1827663672886951936 |
|---|---|
| author | Huiyan Kong Luyi Huang Min Li Ling Zhang Heping Zeng |
| author_facet | Huiyan Kong Luyi Huang Min Li Ling Zhang Heping Zeng |
| author_sort | Huiyan Kong |
| collection | DOAJ |
| description | Terahertz (THz) time-domain spectroscopy (TDS) is a powerful tool used to characterize the surface/interface of materials, and semiconductor/metal interfaces can generate THz emission through ultrafast optical excitation, which can be further improved through the optical excitation of surface plasmons. Here, we assembled cadmium telluride (CdTe) on an AuAg alloy (Au<sub>25</sub>Ag<sub>75</sub>, wt.%) substrate and obtained five times stronger THz emission compared with silicon substrate, and found that the enhancement can be tuned by controlling the thickness of the semiconductor materials and plasmonic metal substrates. We believe that our results not only promote the development of THz emission enhancement, but also provide a straightforward way of producing small, thin, and more efficient terahertz photonic devices. |
| first_indexed | 2024-03-10T00:47:56Z |
| format | Article |
| id | doaj.art-579362086c2945aa8bb32540ee1d92ae |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T00:47:56Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-579362086c2945aa8bb32540ee1d92ae2023-11-23T14:55:58ZengMDPI AGNanomaterials2079-49912022-01-0112229010.3390/nano12020290Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin FilmsHuiyan Kong0Luyi Huang1Min Li2Ling Zhang3Heping Zeng4School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, ChinaSchool of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaSchool of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaState Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, ChinaTerahertz (THz) time-domain spectroscopy (TDS) is a powerful tool used to characterize the surface/interface of materials, and semiconductor/metal interfaces can generate THz emission through ultrafast optical excitation, which can be further improved through the optical excitation of surface plasmons. Here, we assembled cadmium telluride (CdTe) on an AuAg alloy (Au<sub>25</sub>Ag<sub>75</sub>, wt.%) substrate and obtained five times stronger THz emission compared with silicon substrate, and found that the enhancement can be tuned by controlling the thickness of the semiconductor materials and plasmonic metal substrates. We believe that our results not only promote the development of THz emission enhancement, but also provide a straightforward way of producing small, thin, and more efficient terahertz photonic devices.https://www.mdpi.com/2079-4991/12/2/290THz emission time-domain spectroscopycadmium telluridemetalsTHz enhancementsurface plasmons |
| spellingShingle | Huiyan Kong Luyi Huang Min Li Ling Zhang Heping Zeng Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films Nanomaterials THz emission time-domain spectroscopy cadmium telluride metals THz enhancement surface plasmons |
| title | Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films |
| title_full | Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films |
| title_fullStr | Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films |
| title_full_unstemmed | Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films |
| title_short | Enhancement of Terahertz Radiation by Surface Plasmons Based on CdTe Thin Films |
| title_sort | enhancement of terahertz radiation by surface plasmons based on cdte thin films |
| topic | THz emission time-domain spectroscopy cadmium telluride metals THz enhancement surface plasmons |
| url | https://www.mdpi.com/2079-4991/12/2/290 |
| work_keys_str_mv | AT huiyankong enhancementofterahertzradiationbysurfaceplasmonsbasedoncdtethinfilms AT luyihuang enhancementofterahertzradiationbysurfaceplasmonsbasedoncdtethinfilms AT minli enhancementofterahertzradiationbysurfaceplasmonsbasedoncdtethinfilms AT lingzhang enhancementofterahertzradiationbysurfaceplasmonsbasedoncdtethinfilms AT hepingzeng enhancementofterahertzradiationbysurfaceplasmonsbasedoncdtethinfilms |