College of Precision Instrument and Optoelectronics Engineering;
TianjinUniversity;
Tianjin;
300072;
China;
and also with the Key Laboratory ofOptoelectronics Information and Technical Science (Tianjin University);
Ministry of Education;
Tianjin;
300072;
China.;
College of Precision Instrument and OptoelectronicsEngineering;
Tianjin University;
Tianjin;
300072;
China;
the KeyLaboratory of Optoelectronics Information and Technical Science (TianjinUniversity);
Ministry of Education;
Tianjin;
300072;
China;
and also withthe School of Electrical Eng~jncering and Tel~commtmications;
Universityof New South Wales;
Sydney NSW 2052;
Australia.;
School of Electrical Engineering andT~l~cornmunications;
UNSW;
Sydnoy NSW 2052;
Australia.;
Department of Physics;
Harbin EngineeringUniversity;
China.;
Tianjin Key Laboratory of Biomedical Deteztion & Instruments;
Tianjin University;
China.;