光学镊子
俘获
螺旋度
极化(电化学)
光学力
物理
压力梯度力
消散波
光学
凝聚态物理
量子力学
生态学
生物
物理化学
化学
作者
Jinsheng Lu,Vincent Ginis,Soon Wei Daniel Lim,Federico Capasso
标识
DOI:10.1103/physrevlett.131.143803
摘要
Optical traps using nonconservative forces instead of conservative intensity-gradient forces expand the trap parameter space. Existing traps with nonconservative helicity-dependent forces are limited to chiral particles and fields with helicity gradients. We relax these constraints by proposing helicity and polarization gradient optical trapping of achiral particles in evanescent fields. We further propose an optical switching system in which a microsphere is trapped and optically manipulated around a microfiber using polarization gradients. Our Letter deepens the understanding of light-matter interactions in polarization gradient fields and expands the range of compatible particles and stable trapping fields.
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