[15a-B410-1~12] 3.1 光学基礎・光学新領域

[15a-B410-8] Laser trapping and necklace-like assembly formation of polystyrene microparticles
at solution surface

〇工藤 哲弘¹、Lu Jia-Syun¹、Wang Hsuan-Yin¹、増原 宏^1,2 (1.台湾国立交通大応化、2.台湾国立交通大CEFMS)

キーワード：レーザートラップ、マイクロ粒子、気液界面

We here report that a large 150 μm-sized assembly of polystyrene microparticles with necklace-like patterns is prepared by light propagation through whispering gallery mode under the laser trapping of focal diameter about one micrometer. We performed the laser trapping of polystyrene microparticles at solution surface. The light propagation is directly confirmed by 1064 nm backscattering imaging, and finite difference time domain simulation well supports the idea that the optical potential is expanded outside the focal spot based on whispering gallery mode.