自從高溫超導體被發現後，越來越多證據顯示高溫超導並非只是單純的S-Wave對稱，而是d-wave對稱，在相空間裡超導能隙具有節點，而我們使用飛秒脈衝雷射去激發非線性晶體產生兆赫波，並且旋轉光源偏振方向來探測釔鈣鋇銅氧（鈣摻雜量0.05）薄膜樣品在銅氧面上不同方向之載子動力行為，由實驗結果得知，兆赫波穿透訊號因為超導電流的遮蔽，使得量測的數據所得到之各物理量，多顯示為a軸方向與b軸方向之分量，與其之平均值，而可見光激發兆赫波探測技術所量測之結果，則有明顯的90度對稱行為，推測因為樣品被激發後，超導電子密度下降，遮蔽的效應下降，讓我們能夠探測出在節點處有較長的弛豫時間，由此可見，可見光激發兆赫波探測技術比較適合研究高溫超導能隙之對稱行為。

[1] G. Bednorz, and K.A. Müller, Z. Phys. B 64, 189 (1986).
[2] M.K. Wu et al., Phys. Rev. Lett. 58, 908 (1987).
[3] H. Maeda et al., Jpn J. Appl. Phys. 27, L209 (1988).
[4] Z. Z. Sheng et al., Phys. Rev. Lett. 60, 937 (1988).
[5] S. N. Putilin et al., Nature 362, 226 (1993).
[6] J. Bardeen, L.N. Cooper, and J.R. Schrieffer, Phys. Rev. 108, 1175 (1957).
[7] G. Mourou et al., Appl. Phys. Lett., 39, 295 (1981)
[8] C. Fattingerm, D. Grischkowsky, Appl. Phys. Lett., 53, 1480 (1988)
[9] M. van Exter, C. Fattingerm, D. Grischkowsky, Appl. Phys. Lett., 55, 337 (1989)
[10] Rice A., Jin Y., Zhang X.C.,et al., Appl. Phys. Lett., 64,1324 (1994)
[11] Zhang X.C.,and Auston,D.H., J. Appl. Phys.,71, 326 (1992)
[12] X.C.Zhang, Y. Jin, T. D. Hewitt, and T. Sangsir, Appl. Phys. Lett., 62, 2003 (1993)
[13] N.Sarukura, H.Othtake, S.Izumida, and Z.Liu, J. Appl. phys., 84, 654 (1998)
[14] X.C. Zhang,Perspectives in Optoelectronics, Ed. By Sudhanshu S. Jha, Would Scientific, chapter 3 (1995)
[15] D.Some and Arto V. Nurmikko, Phys. Rev. B 53, R 13295 (1996)
[16] Hideyuki Ohtake, shingo Ono, Masahiro Sakai, Zhenlin Liu, Takeyo Tsukamoto, and Nobuhiko Sarikura, Appl. Phys. Lett., 76, 1398 (2000)
[17] J.T. Kindt , C.A. Schmuttenmaer, J. Phys Chem., 100(24), 10373 (1996)
[18] D. M. Mittleman, R. H. Jacobsen, R. Neelamani, R.G. Baraniuk and M. C. Nuss, Appl. Phys. B-Lasers and optics, 67(3), 379 (1998)
[19] Zhiping Jiang, Ming Li, X.C.Zhang, Appl. Phys. Lett., 76, 3221 ( 2000)
[20] C. C. Tsuei and J. R. Kirtley, Rev. Mod. Phys. 72, 969 (2000).
[21]C. C. Tsuei et al., Phys. Rev. Lett. 93, 187004 (2004).
[22] H. J. H. Smilde et al., Phys. Rev. Lett. 95, 257001 (2005).
[23] J. R. Kirtley et al., Nature Physics 2, 190 (2006).
[24]C.W. Luo et al. , Phys. Rev. B 68, 220508(R) (2003)
[25]A. Rice et al. ,Appl. Phys. Lett. 64(11), 14 March 1994
[26]Q. chen and X.-C. Zhang Appl. Phys. Lett. 74(23), 7 June 1999
[27] Q. Wu and X. C. Zhang, Appl. Phys. Lett. 67, 2523 (1995)
[28] Q. Wu and X.-C. Zhang, Appl. Phys. Lett. 68, 1604 (1996)
[29] Q. Wu, M. Litz, and X.-C. Zhang, Appl. Phys. Lett. 68, 2924 (1996)
[30] C. zener, Phys.Rev., 82, 403 (1951)
[31]Paul C. M. Planken et al., J. Opt. Soc. Am. B, Vol.18,No.3,March 2001
[32]黃衍介,非線性光學講義, Chpt. 3,國立清華大學
[33]M. Misra et al., Appl. Phys. Lett., 87, 182909 (2005)
[34]Ikufumi Katayama et al., Journal of Luminescence 128 (2008) 998-1000
[35]黃雯妃,國立交通大學電子物理系碩士論文,2004
[36]Mattis D. C. and Bardeen J., Phys Rev., 1958, 111:412.
[37]P. B. Miller, Phys Rev., 118,928(1960)
[38]A. Frenkel et al., Phys. Rev. B, vol.54 ,No.2 (1996)
[39]A. Pimenov et al., Phys. Rev. B, vol. 59, No. 6 (1999)
[40] Tsong-Ru Tsai et al., Physica C, 391 (2003),281-288
[41] A Maeda et al., J. Phys.:Condens. Matter, 17 ,(2005),R143-R185
[42]向濤,d波超導體,第一版(2007)第十章,科學出版社
[43]A.K. Kristoffersen et al., Proc. Of SPIE, Vol. 5579, P750
[44]M. Tinkham, Introduction of Superconductivity 2nd Edition, Chap. 3.
[45]I. Wilke et al., Physica C, 341-348 (2000),2271-2272
[46] W.N. Hardy et al., Phys. Rev. Lett., 70, 3999-4002 (1993)