[1] B. Timmer, W. Olthuis and A. Van de berg, Sensors and Actuators B 107, 666 (2005).

[2] D. Kohl, Journal Physics D34, R125 (2001).

[3] Yu Huang and Shiquan Tao, Journal of Sensor Technology 1, 29 (2011).

[4] A. K. Prasad, P. I. Gouma, D. J. Kubinski, J. H. Visser, R. E. Soltis and P. J. Schmitz, Thin Solid Films 436, 46 (2003).

[5] A. Setkus, A. Galdikas, A. Mironas, V. Strazdiene, I. imkien, I. Ancutien, V. Janickis, S. Ka iulis, G. Mattogno and G. M. Ingo, Sensors and Actuators B 78, 208 (2001).

[6] C. Shen, C. Hsu, R. Hwang and J. Jeng, Sensors and Actuators B: Chemical 122, 457 (2007).

[7] Hongwei Jiang and Yuanda Wu, Journal of Optoelectronics ·Laser 22, 813 (2011). (in Chinese)

[8] Rozalia Orghici, Peter Lützow, J rg Burgmeier, Jan Koch, Helmut Heidrich, Wolfgang Schade, Nina Welschoff and Siegfried Waldvogel, Sensors 10, 6788 (2010).

[9] Nebiyu A. Yebo, Petra Lommens, Zeger Hens and Roel Baets, Optics Express 18, 11859 (2010).

[10] Neibiyu Adello Yebo, Wim Bogaerts, Zeger Hens and Roel Baets, IEEE Photonics Technology Letters 23, 1505 (2011).

[11] Zhuoni Fan, Bingfeng Yun and Guohua Hu, Journal of Optoelectronics·Laser 23, 1727 (2012). (in Chinese)

[12] Ying Lu, Xiangyong Fu, Dangpng Chu, Wuqi Wen and Jiangquan Yao, Optics Comuunications 284, 476 (2011).

[13] Linjie Zhou and Andrew W. Poon, Optics Express 15, 9194 (2007).

[14] Ying Lu, Congjing Hao and Bing Lu, Optic Communications 285, 4567 (2012).

[15] A. Forleo, L. Francioso, S. Capone, P. Siciliano, P. Lommens and Z. Henz, Sensor Actuators B Chemical 146, 111 (2010).

[16] P. Lommens, D. Van Thourhout, P. F. Smet, D. Poelman and Z. Hens, Nanotechnology 19, 245301 (2008).