| Li Jing-hui,Li Xi-fu,Zhang Hui-yun,Zhang Yu-ping,Musideke Mayilamu,Yao Jian-quan.Theoretical research on cascaded terahertz difference-frequency generation based on sphalerite crystals[J].Optoelectronics Letters,2012,8(5):389-392 |
| Theoretical research on cascaded terahertz difference-frequency generation based on sphalerite crystals |
| Author Name | Affiliation | | Li Jing-hui | Department of Computer Science and Technology, Renai College of Tianjin University, Tianjin 301636, China | | Li Xi-fu | Key Laboratory on Optoelectronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072,China | | Zhang Hui-yun | College of Science, Shandong Universing of Science and Technology, Qingdao 266510, China | | Zhang Yu-ping | College of Science, Shandong Universing of Science and Technology, Qingdao 266510, China | | Musideke Mayilamu | Key Laboratory on Optoelectronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072,\China | | Yao Jian-quan | Key Laboratory on Optoelectronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China |
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| Abstract: |
| A theoretical model of cascaded terahertz (THz) difference-frequency generation is established based on one-dimensional coupled-wave
equations. The relationships between sphalerite crystals’ wave vector mismatches and difference-frequency pump waves are analyzed.
To produce terahertz wave with the frequency of 1.5 THz, 80-order cascaded difference-frequency is applied. By introducing
crystal absorption, we calculate the optimum crystal length and pump frequency under actual circumstances. It is found that
Stokes waves dominate the terahertz waves output in cascaded progress, and cascaded difference-frequency can increase the
photon conversion efficiency obviously. |
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| This work has been supported by National “863” Project (No.2011AA030208). |
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