1. Department of Physics; National Taiwan University; No. 1, Sec. 4, Roosevelt Road Taipei 106 Taiwan Republic of China
2. Graduate Institute of Electronics Engineering; National Taiwan University; No. 1, Sec. 4, Roosevelt Road Taipei 106 Taiwan Republic of China
3. Graduate Institute of Applied Physics; National Taiwan University; No. 1, Sec. 4, Roosevelt Road Taipei 106 Taiwan Republic of China
4. Institute of Optoelectronic Sciences; National Taiwan Ocean University; No.2, Pei-Ning Road Keelung 224 Taiwan Republic of China
5. Graduate Institute of Opto-Mechatronics; National Chung-Cheng University; No. 168, Sec. 1, Daxue Rd., Minxiong Township Chiayi County 621 Taiwan Republic of China
6. Center for Emerging Material and Advanced Devices; National Taiwan University; No. 1, Sec. 4, Roosevelt Road Taipei 106 Taiwan Republic of China