[1] Alferness R C 1982 IEEE Trans. Microwave Theory
Tech. 30 1121

[2] Noguchi K, Mitomi O, Kawano K and Yanagibashi M 1993
IEEE Photon. Technol. Lett. 5 52

[3] Ashley P R 1994 Proc. SPIE 2290 114

[4] Shi Y Q, Lin W P, David J O, James H B, Zhang H, William H
S, Zhang C and Larry R D 2000 Appl. Phys. Lett. 77 1

[5] Sun Fei and Yu J Z 2006 Chin. Phys. Lett. 23
868

[6] Chen K X, Chu P L, Chan H P and Chiang K S 2007 Chin.
Phys. Lett. 24 1728

[7] Gao D S, Hao R and Zhou Z P 2007 Chin. Phys. Lett.
24 3172

[8] Chen D, Fetterman H R, Chen A, William H S, Larry R D,
Wang W and Shi Y Q1997 Appl. Phys. Lett. 70 3335

[9] Shi Y Q, Zhang C, Zhang H, James H B, Larry R D, Bruce H R
and William H S 2000 Science 288 5463

[10] Luo J, Liu S, Haller M A, Kang J W, Kim T D, Jang S H,
Chen B, Tucker N, Li H, Tang H Z, Larry R D, Liao Y, Bruce H R and
Jen A K 2004 Proc. SPIE 5351 36

[11] Enami Y, Mathine D, DeRose C T, Norwood R A, Luo J, Jen A
K and Peyghambarian N 2007 Appl. Phys. Lett. 91 093505

[12] Song R, Song H C, William H S and Cox C H 2007 IEEE
J. Quan. Electron. 43 633

[13] Song R and William H S 2008 Appl. Phys. Lett.
92 031103

[14] Najafi S, Touam T, Sara R, Andrews M and Fardad M J 1998
IEEE J. Lightwave Technol. 16 1640

[15] Dong L, Zhang H X and Fallahi M 2005 Opt. Lett.
30 3

[16] Teng C C 1992 Appl. Phys. Lett. 60 1538

[17] Enami Y, Meredith G, and Peyghambarian N, Kawazu M and
Jen A K 2003 Appl. Phys. Lett. 82 4