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The complex refractive indices of the Cr film are obtained by terahertz time-domain spectroscopy. The penetration depth the Cr film is calculated based on the complex refractive indices, and then the effective cavity length and the emitted spectrum of the structure Cr/GaAs/Cr are simulated. The resonant frequencies are located at 0.32, 0.65, 0.98, 1.31 and 1.65 THz, respectively. The peak intensity of the cavity photo-conductive resource at 0.32 THz is 25 times higher than that of non-cavity one and the full width at half maximum is greatly narrowed. The relation between the emitting dipoles and the standing wave field in the cavity is also discussed. The results show that the emission intensity is enhanced when the emitting dipoles are located at the nodes of the standing wave field, but greatly suppressed at antinodes.
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Keywords:
- planar microcavity /
- metal films /
- emitting dipoles /
- terahertz source
[1] Bradley F, Zhang X C 2003 Physics 32 286
[2] [3] Chen W, Xing M X, Ren G, Wang K, Du X Y, Zhang Y J, Zheng W H 2009 Acta Phys. Sin. 58 3955 (in Chinese) [陈微, 邢名欣, 任刚, 王科, 杜晓宇, 张冶金, 郑婉华 2009 58 3955]
[4] Foresi J S, Villeneuve P R, Ferrera J, Thoen E R, Steinmeyer G, Fan S, Joannopoulos J D, Kimerling L C, Smith H I, Ippen E P 1997 Nature 390 143
[5] [6] [7] Boroditsky M, Krauss T F, Coccioli R, Vrijen R, Bhat R, Yablonovitch E 1999 Appl. Phys. Lett. 175 1036
[8] [9] Xu X S, Xiong Z G, Sun Z H, Du W, Lu L, Chen H D, Jin A Z, Zhang D Z 2006 Acta Phys. Sin. 56 1248 (in Chinese) [许兴胜, 熊志刚, 孙增辉, 杜 伟, 鲁 琳, 陈弘达, 金爱子, 张道中 2006 56 1248]
[10] Mekis A, Chen J C, Kurland I, Fan S H, Pierre R V 1996 Phys. Rev. Lett. 77 3787
[11] [12] [13] Qiao F, Zhang C, Wan J, Zi J 2000 Appl. Phys. Lett. 77 3698
[14] [15] Wang K, Zheng W H, Ren G, Du X Y, Xing M X, Chen L H 2008 Acta Phys. Sin. 57 1730 (in Chinese) [王科, 郑婉华, 任刚, 杜晓宇, 邢名欣, 陈良惠 2008 57 1730]
[16] [17] Harel R, Brener I, Pfeiffer L N, West K 1999 Conference on Laser and Elctro-Optics, Baltimore, Maryland, May 23--28, 1999 p461
[18] [19] Koch M, Shah J, Wang H, Damen T C 1997 Appl. Phys. Lett. 71 1240
[20] Shirai H, Kishimoto E, Kokuhata T, Miyagawa H 2009 Appl. Opt. 48 6934
[21] [22] Ma F Y, Liu X Y 2007 Appl. Opt. 46 6247
[23] [24] [25] Dodabalapur A, Rothberg L J, Jordan R H, Miller T M, Slusher R E, Philips J M 1996 J. Appl. Phys. 80 6954
[26] Ma F Y, Su J P, Gong Q X, Yang J, Du Y L, Guo M T, Yuan B 2011 Chin. Phys. Lett. 28 097803
[27] [28] [29] Shinho C 2006 J. Korean Phys. Soc. 48 1224
[30] Shi X X, Zhao G Z, Zhang C L, Cui L J, Zeng Y P 2008 Chin. J. Lasers 35 396 (in Chinese) [石小溪, 赵国忠, 张存林, 崔利杰, 曾一平 2008 中国激光 35 396]
[31] [32] Markelz A G, Roitberg A, Heilweil E J 2000 Chem. Phys. Lett. 320 42
[33] -
[1] Bradley F, Zhang X C 2003 Physics 32 286
[2] [3] Chen W, Xing M X, Ren G, Wang K, Du X Y, Zhang Y J, Zheng W H 2009 Acta Phys. Sin. 58 3955 (in Chinese) [陈微, 邢名欣, 任刚, 王科, 杜晓宇, 张冶金, 郑婉华 2009 58 3955]
[4] Foresi J S, Villeneuve P R, Ferrera J, Thoen E R, Steinmeyer G, Fan S, Joannopoulos J D, Kimerling L C, Smith H I, Ippen E P 1997 Nature 390 143
[5] [6] [7] Boroditsky M, Krauss T F, Coccioli R, Vrijen R, Bhat R, Yablonovitch E 1999 Appl. Phys. Lett. 175 1036
[8] [9] Xu X S, Xiong Z G, Sun Z H, Du W, Lu L, Chen H D, Jin A Z, Zhang D Z 2006 Acta Phys. Sin. 56 1248 (in Chinese) [许兴胜, 熊志刚, 孙增辉, 杜 伟, 鲁 琳, 陈弘达, 金爱子, 张道中 2006 56 1248]
[10] Mekis A, Chen J C, Kurland I, Fan S H, Pierre R V 1996 Phys. Rev. Lett. 77 3787
[11] [12] [13] Qiao F, Zhang C, Wan J, Zi J 2000 Appl. Phys. Lett. 77 3698
[14] [15] Wang K, Zheng W H, Ren G, Du X Y, Xing M X, Chen L H 2008 Acta Phys. Sin. 57 1730 (in Chinese) [王科, 郑婉华, 任刚, 杜晓宇, 邢名欣, 陈良惠 2008 57 1730]
[16] [17] Harel R, Brener I, Pfeiffer L N, West K 1999 Conference on Laser and Elctro-Optics, Baltimore, Maryland, May 23--28, 1999 p461
[18] [19] Koch M, Shah J, Wang H, Damen T C 1997 Appl. Phys. Lett. 71 1240
[20] Shirai H, Kishimoto E, Kokuhata T, Miyagawa H 2009 Appl. Opt. 48 6934
[21] [22] Ma F Y, Liu X Y 2007 Appl. Opt. 46 6247
[23] [24] [25] Dodabalapur A, Rothberg L J, Jordan R H, Miller T M, Slusher R E, Philips J M 1996 J. Appl. Phys. 80 6954
[26] Ma F Y, Su J P, Gong Q X, Yang J, Du Y L, Guo M T, Yuan B 2011 Chin. Phys. Lett. 28 097803
[27] [28] [29] Shinho C 2006 J. Korean Phys. Soc. 48 1224
[30] Shi X X, Zhao G Z, Zhang C L, Cui L J, Zeng Y P 2008 Chin. J. Lasers 35 396 (in Chinese) [石小溪, 赵国忠, 张存林, 崔利杰, 曾一平 2008 中国激光 35 396]
[31] [32] Markelz A G, Roitberg A, Heilweil E J 2000 Chem. Phys. Lett. 320 42
[33]
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