论文标题
带有径向laguerre-gauss梁的明亮光学镊子的体积和反射减少
Reduced volume and reflection for bright optical tweezers with radial Laguerre-Gauss beams
论文作者
论文摘要
空间结构的光已为增强成像以及光学操纵和颗粒限制开辟了广泛的机会。在这里，我们表明，径向拉瓜仪（LG）梁的叠加的相位相着照明为明亮的光学镊子陷阱提供了改进的定位，并具有狭窄的径向和轴向强度分布。此外，可以在波长尺度上利用紧密聚焦的径向LG场和紧密聚焦的径向LG场的总和。这里开发的一个例子是抑制了纳米丝表面附近反射中的干扰条纹，并有望改善冷原子的递送和操纵。
Spatially structured light has opened a wide range of opportunities for enhanced imaging as well as optical manipulation and particle confinement. Here, we show that phase-coherent illumination with superpositions of radial Laguerre-Gauss (LG) beams provides improved localization for bright optical tweezer traps, with narrowed radial and axial intensity distributions. Further, the Gouy phase shifts for sums of tightly focused radial LG fields can be exploited for novel phase-contrast strategies at the wavelength scale. One example developed here is the suppression of interference fringes from reflection near nano-dielectric surfaces, with the promise of improved cold-atom delivery and manipulation.
