1. Department of Photonics and Institute of Electro-Optical
Engineering, National Chiao Tung University, 1001 Ta Hsueh Rd.,
Hsinchu 300, Taiwan
2. Department of Materials Science and Engineering,
National Chiao-Tung University, 1001 Ta Hsueh Rd., Hsinchu
300, Taiwan
3. Research and Development Center, Epistar
Corporation, 21, Li-Hsin Rd., Hsinchu Science Park, Hsinchu 300,
Taiwan
4. Advanced Technology Development Division,
Crystalwise Technology Inc., No.8, Ke Bei 5th Rd., Jhunan
Science Park, Miaoli County 35053, Taiwan
5. Department of Materials Science and Engineering,
National Chiao-Tung University, No. 1, Sec. 4, Roosevelt
Road, 10617 Taipei, Taiwan
6. Department of Electrical and Electronic Engineering,
Mie University, 1577 Kurimamachiya, Tsu, Mie 514-8507,
Japan