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Mode analysis of the terahertz wave generated by 0.14 THz overmoded surface wave oscillator (SWO) (overmoded ratio D/ 3) is theoretically accomplished and experimentally validated. At first, longitudinal field-expansion method for mode analysis is established aiming at overmoded Cherenkov devices. Then this method is used to analyze the theoretical mode content of 0.14 THz SWO in detail based on the simulation results of electric field extracted from a 2.5-dimensional PIC (particle-in-cell) code. Results show that the mode content of terahertz wave in different characteristic regions of the oscillator is varied due to the mode conversion, and it is dominated by TM02 and TM03 modes accompanied by a small quantity of TM04 mode at the output. Finally, the energy distribution in the near-field radiation of 0.14 THz SWO is obtained by image-displaying method. The experimental result is reasonably in accord with the theoretical distribution calculated from the mode analysis results under experimental conditions, testifying the feasibility of longitudinal field-expansion method for the mode analysis and the correctness of its results.
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Keywords:
- overmoded /
- surface wave oscillator /
- mode analysis /
- field-expansion method
[1] Benford J, Swegle J A, Schamiloglu E 2007 High Power Microwaves (2nd Ed.) (New York: Taylor and Francis) p321–p370
[2] Bratman V L, Denisov G G, Ofitserov M M, Korovin S D, Polevin S D, Rostov V V 1987 IEEE Trans. Plasma Sci. PS-15 2
[3] Booske J H 2008 Phys. Plasma 15 055502
[4] Wu Y, Jin X, Ma Q S, Li Z H, Ju B Q, Su C, Xu Z, Tang C X 2011 Acta Phys. Sin. 60 084101 (in Chinese) [吴洋, 金晓, 马乔生, 李正红, 鞠炳全, 苏昶, 许州, 唐传祥 2011 物理学报 60 084101]
[5] Min S H, Kwon O J, Sattorov M A, So J K, Park S H, Baek I K, Choi D H, Shin Y M, Park G S 2011 Proceedings of 36th International conference on IRMMW-THz Houston, USA, October 2–7, 2011 p1
[6] David K A, Yuval C, Susanne M M, Alan B, Baruch L, Thomas M A, William W D 1998 IEEE Trans. Plasma Sci. 26 591
[7] Tong C J, Li X Z, Wang J G, Wang X Z, Wang G Q 2009 Proc. SPIE 7385 73851
[8] Li X Z, Wang J G, Song Z M, Chen C H, Sun J, Zhang X W, Zhang Y C 2012 Phys. Plasmas 19 083111
[9] Chen H B, Zhou C M, Hu L L, Ma G W, Xu D M, Song R, Jin X 2010 High power Laser and Particle Beams 22 865 (in Chinese) [陈洪斌, 周传明, 胡林林, 马国武, 许冬明, 宋睿, 金晓 2010 强激光与粒子束 22 865]
[10] Zhang J, Zhong H H, Ling L 2004 IEEE Trans. Plasma Sci. 32 2236
[11] Zhu J, Shu T, Zhang J, Li G L, Zhang Z H 2010 Phys. Plasmas 17 083104
[12] Wang G Q, Wang J G, Li X Z, Fan R Y, Wang X Z, Wang X F, Tong C J 2010 Acta Phys. Sin. 59 8459 (in Chinese) [王光强, 王建国, 李小泽, 范如玉, 王行舟, 王雪锋, 童长江 2010 物理学报 59 8459]
[13] Booske J H, Dobbs R J, Joye C D, Kory C L, Neil G R, Park G S, Park J, Temkin R J 2011 IEEE Trans. Terahertz Sci. Tech. 1 54
[14] Wang J G, Zhang D H, Liu C L, Li Y D, Wang Y, Wang H G, Qiao H L, Li X Z 2009 Phys. Plasmas 16 033108
[15] Wang W X, Yue L N, Zhao G Q, Gong Y B 2005 J. Infrared Milli. Terahz. Waves 26 147
[16] Wang G Q, Li X Z, Wang J G, Wang X Z, Tong C J 2009 Proc. SPIE 7385 73850Y
[17] Zhu X Q, Wang J G, Wang Y, Wang G Q, Chen Z G 2011 High power Laser and Particle Beams 23 2157 (in Chinese) [朱湘琴, 王建国, 王玥, 王光强, 陈再高 2011 强激光与粒子束 23 2157]
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[1] Benford J, Swegle J A, Schamiloglu E 2007 High Power Microwaves (2nd Ed.) (New York: Taylor and Francis) p321–p370
[2] Bratman V L, Denisov G G, Ofitserov M M, Korovin S D, Polevin S D, Rostov V V 1987 IEEE Trans. Plasma Sci. PS-15 2
[3] Booske J H 2008 Phys. Plasma 15 055502
[4] Wu Y, Jin X, Ma Q S, Li Z H, Ju B Q, Su C, Xu Z, Tang C X 2011 Acta Phys. Sin. 60 084101 (in Chinese) [吴洋, 金晓, 马乔生, 李正红, 鞠炳全, 苏昶, 许州, 唐传祥 2011 物理学报 60 084101]
[5] Min S H, Kwon O J, Sattorov M A, So J K, Park S H, Baek I K, Choi D H, Shin Y M, Park G S 2011 Proceedings of 36th International conference on IRMMW-THz Houston, USA, October 2–7, 2011 p1
[6] David K A, Yuval C, Susanne M M, Alan B, Baruch L, Thomas M A, William W D 1998 IEEE Trans. Plasma Sci. 26 591
[7] Tong C J, Li X Z, Wang J G, Wang X Z, Wang G Q 2009 Proc. SPIE 7385 73851
[8] Li X Z, Wang J G, Song Z M, Chen C H, Sun J, Zhang X W, Zhang Y C 2012 Phys. Plasmas 19 083111
[9] Chen H B, Zhou C M, Hu L L, Ma G W, Xu D M, Song R, Jin X 2010 High power Laser and Particle Beams 22 865 (in Chinese) [陈洪斌, 周传明, 胡林林, 马国武, 许冬明, 宋睿, 金晓 2010 强激光与粒子束 22 865]
[10] Zhang J, Zhong H H, Ling L 2004 IEEE Trans. Plasma Sci. 32 2236
[11] Zhu J, Shu T, Zhang J, Li G L, Zhang Z H 2010 Phys. Plasmas 17 083104
[12] Wang G Q, Wang J G, Li X Z, Fan R Y, Wang X Z, Wang X F, Tong C J 2010 Acta Phys. Sin. 59 8459 (in Chinese) [王光强, 王建国, 李小泽, 范如玉, 王行舟, 王雪锋, 童长江 2010 物理学报 59 8459]
[13] Booske J H, Dobbs R J, Joye C D, Kory C L, Neil G R, Park G S, Park J, Temkin R J 2011 IEEE Trans. Terahertz Sci. Tech. 1 54
[14] Wang J G, Zhang D H, Liu C L, Li Y D, Wang Y, Wang H G, Qiao H L, Li X Z 2009 Phys. Plasmas 16 033108
[15] Wang W X, Yue L N, Zhao G Q, Gong Y B 2005 J. Infrared Milli. Terahz. Waves 26 147
[16] Wang G Q, Li X Z, Wang J G, Wang X Z, Tong C J 2009 Proc. SPIE 7385 73850Y
[17] Zhu X Q, Wang J G, Wang Y, Wang G Q, Chen Z G 2011 High power Laser and Particle Beams 23 2157 (in Chinese) [朱湘琴, 王建国, 王玥, 王光强, 陈再高 2011 强激光与粒子束 23 2157]
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