Chiu Ya-Ping | Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Kaohsiung 804, Taiwan, R.O.C.

Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Kaohsiung 804, Taiwan, R.O.C.

Institute Of Physics Academia Sinica

Institute Of Physics Academia Sinica

Department Of Photonics National Chiao Tung University

Institute of Microelectronics & Department of Electrical Engineering National Cheng Kung University

Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan

Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan

Department of Photonics, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C.

Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Kaohsiung 804, Taiwan, R.O.C.

Department of Physics, National Sun Yat-sen University, Kaohsiung 804, Taiwan, R.O.C.