Author Affiliations

L. F. K. Lui,¹ Lixin Xu,^1,2 P. K. A. Wai,¹ L. Y. Chan,¹ C. C. Lee,¹ H. Y. Tam,³ and M. S. Demokan³

¹Photonics Research Centre and Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong

²Department of Physics, University of Science and Technology of China, Hefei, 230026, China

³Photonics Research Centre and Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong

Phone: +852 2766-6231, fax: +852 2362-8439, email: enwai@polyu.edu.hk