Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure
Terahertz high-data communication creates numerous demands for terahertz wave amplitude modulation. Here, we experimentally demonstrate a high-speed terahertz wave modulator based on 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST)/Si hybrid structure. An externally modulated...
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8306983/ |
| _version_ | 1818583491832446976 |
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| author | Li Jiu-sheng Li Shao-he Zhang Le |
| author_facet | Li Jiu-sheng Li Shao-he Zhang Le |
| author_sort | Li Jiu-sheng |
| collection | DOAJ |
| description | Terahertz high-data communication creates numerous demands for terahertz wave amplitude modulation. Here, we experimentally demonstrate a high-speed terahertz wave modulator based on 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST)/Si hybrid structure. An externally modulated 808-nm pumping laser is utilized to generate photoexcited free carriers at the DAST medium. With the increase of illumination laser intensity, the modulation depth continues to increase in the frequency range from 0.23 to 0.35 THz. A dynamic amplitude modulation at 0.25-THz carrier wave shows that the our modulator provides a modulation speed of 1.26 MHz with a depth of up to 53% at an external pump laser irradiance of 3.5 W/cm<sup>2</sup>. Our present DAST/Si hybrid structure provides a practicable route to achieve effective signal modulation for terahertz communication system. |
| first_indexed | 2024-12-16T08:06:08Z |
| format | Article |
| id | doaj.art-d13510b718a440cf8f3b0d8356c8b86c |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-16T08:06:08Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-d13510b718a440cf8f3b0d8356c8b86c2022-12-21T22:38:28ZengIEEEIEEE Photonics Journal1943-06552018-01-011021610.1109/JPHOT.2018.28122388306983Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid StructureLi Jiu-sheng0https://orcid.org/0000-0002-5960-0348Li Shao-he1Zhang Le2Centre for THz Research, China Jiliang University, Hangzhou, ChinaCentre for THz Research, China Jiliang University, Hangzhou, ChinaCentre for THz Research, China Jiliang University, Hangzhou, ChinaTerahertz high-data communication creates numerous demands for terahertz wave amplitude modulation. Here, we experimentally demonstrate a high-speed terahertz wave modulator based on 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate (DAST)/Si hybrid structure. An externally modulated 808-nm pumping laser is utilized to generate photoexcited free carriers at the DAST medium. With the increase of illumination laser intensity, the modulation depth continues to increase in the frequency range from 0.23 to 0.35 THz. A dynamic amplitude modulation at 0.25-THz carrier wave shows that the our modulator provides a modulation speed of 1.26 MHz with a depth of up to 53% at an external pump laser irradiance of 3.5 W/cm<sup>2</sup>. Our present DAST/Si hybrid structure provides a practicable route to achieve effective signal modulation for terahertz communication system.https://ieeexplore.ieee.org/document/8306983/Terahertz waveterahertz modulatorDAST. |
| spellingShingle | Li Jiu-sheng Li Shao-he Zhang Le Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure IEEE Photonics Journal Terahertz wave terahertz modulator DAST. |
| title | Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure |
| title_full | Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure |
| title_fullStr | Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure |
| title_full_unstemmed | Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure |
| title_short | Terahertz Modulator Using 4-N,N-Dimethylamino-4′-N′-Methyl-Stilbazolium Tosylate (DAST)/Si Hybrid Structure |
| title_sort | terahertz modulator using 4 n n dimethylamino 4 n methyl stilbazolium tosylate dast si hybrid structure |
| topic | Terahertz wave terahertz modulator DAST. |
| url | https://ieeexplore.ieee.org/document/8306983/ |
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