[14a-PB1-1~12] 3.1 Basic optics and frontier of optics

▲ [14a-PB1-6] Femtosecond Laser-Induced Chiral Crystallization of Sodium Chlorate

〇(M2)Yu Hau Ye¹, Shun Fa Wang¹, Teruki Sugiyama^1,2,3 (1.Department of Applied Chemistry, National Chiao Tung Univ., Taiwan, 2.Division of Materials Science, NAIST, Japan, 3.Center for Emergent Functional Matter Science, National Chiao Tung Univ., Taiwan)

Keywords:Optical trapping, Femtosecond Laser-induced, Chiral Crystallization of Sodium Chlorate

For the past decade, we have succeeded in demonstrating the crystallization of amino acids, proteins, saccharides, and inorganic compounds using optical trapping with continuous-wave (cw) lasers. In addition, we demonstrated crystallization also by applying focused femtosecond (fs) laser pulses with a low repetition rate into a glycine supersaturated solution. However, the crystallization mechanisms are totally different from each other. On the other hand, optical trapping is also made possible by a femtosecond laser with a high repetition rate. Such ultrashort-pulsed lasers exhibit high trapping efficiency due to the high intense photon density and nonlinear effects, comparing to optical trapping using cw lasers [2]. Here, we present the crystallization of sodium chlorate (NaClO₃) with a fs laser with a high repetition rate and discuss the dynamics and mechanism of crystallization and polymorphic transition from the viewpoints of laser trapping and laser ablation with fs laser pulses.