[1] J. P. Sokoloff, P. R. Prucnal, I. Glesk, and M. Kane, IEEE Photon. Technol. Lett. 5, 787 (1993).
[2] R. J. Manning, A. E. Kelly, A. J. Poustie, and K. J. Blow, in Proceedings of Nonlinear Optics ’98: Materials, Fundamentals and Applications Topical Meeting p. 159 (1998).
[3] B. S. Robinson and K. K. Hall, in Proceedings of Conference on Lasers and Electro-Optics 2000 p. 331 (2000).
[4] K. L. Deng, I. Glesk, K. I. Kang, and P. R. Prucnal, IEEE Photon. Technol. Lett. 9, 830 (1997).
[5] X. Zhou, P. Ye, K. J. Guan, and J. T. Lin, IEEE Photon. Technol. Lett. 11, 125 (1999).
[6] I. Glesk, J. P. Solokoff, and P. R. Prucnal, Electron. Lett. 30, 1322 (1994).
[7] B.-Y. Yu, P. Toliver, R.-J. Runser, K.-L. Deng, D.-Y. Zhou, I. Glesk, and P. R. Prucnal, IEEE Micro. 18 (1), 28 (1998).
[8] J. M. Tang, P. S. Spencer, and K. A. Shore, in 1998 IEEE Sixth International Conference on Terahertz Electronics
[9] 187 (1998).
[10] Y. H. Kao, I. V. Goltser, M. N. Islam, and G. Raybon, in Proceedings of CLEO’97 CTuJ4, p. 94 (1997).
[11] L. S. Wen, J. Wu, and J. T. Lin, Proc. ICT 1, 1335 (2002).
[12] J. M. Tang and K. A. Shore, IEEE J. Quantum Electron. 35, 1704 (1999).