Magnetically controllable random lasers

• Main Authors: Cheng-Yen Tsai, 蔡政諺
• Other Authors: 陳永芳
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/zz653x

碩士 === 國立臺灣大學 === 應用物理研究所 === 105 === Towards practical applications of random lasers, controllability is a key factor. Herein, magnetically controllable random lasers (MCRLs) are demonstrated. Under prescribed magnetic field, the MCRLs composed of all nontoxic materials, including stilbene 420 laser dye, TiO2 nanoparticles, and Fe3O4 nanoparticles, possess magnetic controllability and switchability with good responsivity and durability. The distribution of Fe3O4 nanoparticles can be manipulated by an applied magnetic field, which in turn alters the formation of the coherent loops and the properties of laser action. The MCRLs developed here can serve as magneto-optics prototypes for several potential applications, such as biomedicine and optical communications.