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由于表面电磁波沿着介质-等离子体分界面传播,而很难通过对传统的表面波等离子体(SWP)源施加负偏压实现金属材料溅射,因此限制了SWP源的使用范围. 近期,一种基于负偏压离子鞘导波的SWP源克服了这个问题,且其加热机理是表面等离激元(SPP)的局域增强电场激励气体放电产生. 但是该SWP源放电过程的影响因素并未研究清晰,导致其最佳放电条件没有获得. 本文采用粒子(PIC)和蒙特卡罗碰撞(MCC)相结合的模拟方法,探讨了负偏压离子鞘及气体压强影响SWP电离发展过程的放电机理. 模拟结果表明,负偏压和气体压强的大小影响了离子鞘的厚度、SPP的激励和波模的时空转化,从而表现出不同的放电形貌. 进一步分析确定,在负偏压200 V左右和气体压强40 Pa附近,该SWP源的放电效果最佳.Due to surface electromagnetic waves propagating along the dielectric-plasma interface, the application of surface-wave plasma (SWP) is limited in view of the fact that it is very difficult to realize metal sputtering by using negative-biased voltage in traditional SWP sources. Recently, this problem is overcome by a type of SWP source based on the guided wave in ion sheath layer driven by negative-biased voltage. And the plasma heating mechanism is originated from gas discharges excited by the local-enhanced electric field of surface plasmon polariton (SPP). However, the best discharge condition is not obtained because the influence factors affecting the discharge process studied is not clear. In this paper, the discharge mechanism of SWP ionization process influenced by gas pressure and negative-biased voltage along the ion sheath layer is investigated. The simulation method is by means of combining particle-in-cell (PIC) with Monte Carlo collision (MCC). Simulated results suggest that the values of negative-biased voltage and gas pressure can influence the thickness of ion sheath layer, the excitation of SPP, and the spatio-temporal conversion of wave mode, which further induces the different discharge performances. Moreover, the discussed analysis states that a better discharge performance can be obtained when approximately a negative-biased voltage of -200 V and a gas pressure of 40 Pa applied.
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Keywords:
- surface-wave plasma /
- surface plasmon polariton /
- particle-in-cell simulation /
- ion sheath layer
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[5] Zhou Q, Dong Z 2013 Acta. Phys. Sin. 62 205202 (in Chinese)[周前红, 董志伟 2013 物理学报 62 205202]
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[17] Chen Z, Liu M, Lan C, Chen W, Luo Z, Hu X 2008 Chin. Phys. Lett. 25 4333
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[19] Kousaka H, Umehara N 2006 Vacuum 80 806
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[21] Chen Z, Ye Q, Xia G, Hong L, Hu Y, Zheng X, Li P, Zhou Q, Hu X, Liu M 2013 Phys. Plasmas 20 033502
[22] Chen Z, Liu M, Xia G, Huang Y 2012 IEEE Trans. Plasma Sci. 40 2861
[23] Chen Z, Xia G, Zhou Q, Hu Y, Zheng X, Zhen Z, Hong L, Li P, Huang Y 2012 Rev. Sci. Instrum. 83 084701
[24] Chen Z, Xia G, Liu M, Zheng X, Hu Y, Li P, Xu G, Hong L, Sheng H, Hu X W 2013 Acta Phys. Sin. 62 195204 (in Chinese)[陈兆权, 夏广庆, 刘明海, 郑晓亮, 胡业林, 李平, 徐公林, 洪伶俐, 沈昊宇, 胡希伟 2013 物理学报 62 195204]
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[26] Chen Z, Liu M, Tang L, Lv J, Hu X 2010 Chin. Phys. Lett. 27 025205
[27] Chen Z, Liu M, Hong L, Zhou Q, Cheng L, Hu X 2011 Phys. Plasmas 18 013505
[28] Chen Z, Liu M, Lan C, Chen W, Tang L, Luo Z, Yan B, Lv J, Hu X 2009 Chin. Phys. B 18 3484
[29] Kousaka H, Ono K 2003 Plasma Sources Sci. Technol. 12 273
[30] Yang J, Shi F, Yang T, Meng Z 2010 Acta. Phys. Sin. 59 8701 (in Chinese)[杨涓, 石峰, 杨铁链, 孟志强 2010 物理学报 59 8701]
[31] Boeuf J P, Chaudhury B, Zhu G 2010 Phys. Rev. Lett. 104 015002
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[1] Dong T, Ye K, Liu W 2012 Acta. Phys. Sin. 61 145202 (in Chinese)[董太源, 叶坤涛, 刘维清 2012 物理学报 61 145202]
[2] Hans Schltera, and Antonia Shivarova 2007 Physics Reports 443 121
[3] Liu M, Sugai H, Hu X, Ishijima T, Jiang Z, Li B, Dan M 2006 Acta. Phys. Sin. 55 5905 (in Chinese) [刘明海, 菅井秀郎, 胡希伟, 石岛芳夫, 江中和, 李斌, 但敏 2006 物理学报 55 5905]
[4] Zhu G, Boeuf J P, Li J 2012 Acta. Phys. Sin. 61 235202 (in Chinese)[朱国强, Jean-Pierre Boeuf, 李进贤 2012 物理学报 61 235202]
[5] Zhou Q, Dong Z 2013 Acta. Phys. Sin. 62 205202 (in Chinese)[周前红, 董志伟 2013 物理学报 62 205202]
[6] Sugai H, Ghanashev I, Nagatsu M 1998 Plasma Sources Sci. Technol. 7 192
[7] Nagatsu M, Terashita F, Nonaka H, Xu L, Nagata T, Koide Y 2005 Appl. Phys. Lett. 86 211502
[8] Xu L, Terashita F, Nonaka H, Ogino A, Nagata T, Koide Y, Nanko S, Kurawaki I, Nagatsu M 2006 J. Phys. D: Appl. Phys. 39 148
[9] Xu X, Liu F, Zhou Q, Liang B, Liang Y, Liang R 2008 Appl. Phys. Lett. 92 011501
[10] Liang B, Ou Q, Liang Y, Liang R 2007 Chin. Phys. 16 3732
[11] Chang X, Kunii K, Liang R, Nagatsu M 2013 J. Appl. Phys. 114 183302
[12] Hu Y, Chen Z, Liu M, Hong L, Li P, Zheng X, Xia G, Hu X 2011 Chin. Phys. Lett. 28 115201
[13] Chen Z, Liu M, Zhou Q, Hu Y, Yang A, Zhu L, Hu X 2011 Chin. Phys. Lett. 28 045201
[14] Chen Z, Liu M, Zhou P, Chen W, Lan C, Hu X 2008 Plasma Sci. Technol. 10 655
[15] Chen Z, Liu M, Tang L, Hu P, Hu X 2009 J. Appl. Phys. 106 013314
[16] Chen Z, Liu M, Tang L, Lv J, Wen Y, Hu X 2009 J. Appl. Phys. 106 063304
[17] Chen Z, Liu M, Lan C, Chen W, Luo Z, Hu X 2008 Chin. Phys. Lett. 25 4333
[18] Kousaka H, Xu J Q, Umehara N 2005 Jpn. J. Appl. Phys. 44 1052
[19] Kousaka H, Umehara N 2006 Vacuum 80 806
[20] Kousaka H, Xu J Q, Umehara N 2006 Vacuum 80 1154
[21] Chen Z, Ye Q, Xia G, Hong L, Hu Y, Zheng X, Li P, Zhou Q, Hu X, Liu M 2013 Phys. Plasmas 20 033502
[22] Chen Z, Liu M, Xia G, Huang Y 2012 IEEE Trans. Plasma Sci. 40 2861
[23] Chen Z, Xia G, Zhou Q, Hu Y, Zheng X, Zhen Z, Hong L, Li P, Huang Y 2012 Rev. Sci. Instrum. 83 084701
[24] Chen Z, Xia G, Liu M, Zheng X, Hu Y, Li P, Xu G, Hong L, Sheng H, Hu X W 2013 Acta Phys. Sin. 62 195204 (in Chinese)[陈兆权, 夏广庆, 刘明海, 郑晓亮, 胡业林, 李平, 徐公林, 洪伶俐, 沈昊宇, 胡希伟 2013 物理学报 62 195204]
[25] Zhu L, Chen Z, Yin Z, Wang G, Xia G, Hu Y, Zheng X, Zhou M, Chen M, Liu M 2014 Chin. Phys. Lett. 31 035203
[26] Chen Z, Liu M, Tang L, Lv J, Hu X 2010 Chin. Phys. Lett. 27 025205
[27] Chen Z, Liu M, Hong L, Zhou Q, Cheng L, Hu X 2011 Phys. Plasmas 18 013505
[28] Chen Z, Liu M, Lan C, Chen W, Tang L, Luo Z, Yan B, Lv J, Hu X 2009 Chin. Phys. B 18 3484
[29] Kousaka H, Ono K 2003 Plasma Sources Sci. Technol. 12 273
[30] Yang J, Shi F, Yang T, Meng Z 2010 Acta. Phys. Sin. 59 8701 (in Chinese)[杨涓, 石峰, 杨铁链, 孟志强 2010 物理学报 59 8701]
[31] Boeuf J P, Chaudhury B, Zhu G 2010 Phys. Rev. Lett. 104 015002
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