Controllable light capsules employing modified Bessel-Gauss beams.
Controllable light capsules employing modified Bessel-Gauss beams.
复制标题
采用改进的贝塞尔-高斯光束的可控光胶囊
DOI：
10.1038/srep29001
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发表时间：
2016-07-08
影响因子：
4.6
通讯作者：
Li Y
中科院分区：
文献类型：
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作者：
Gong L;Liu W;Zhao Q;Ren Y;Qiu X;Zhong M;Li Y
我们直接利用修正贝塞尔-高斯光束的固有特性，从理论和实验上报道了一类新型的近乎完全黑暗的受控光囊。只要选择适当的参数，这些光束在传输过程中就能自然地产生三维瓶状区。值得注意的是，通过调节光束参数，可以控制光瓶显示各种几何形状，从而产生可调节的光囊。我们详细地介绍了由修正的贝塞尔-高斯光束产生的光囊的理论起源和特性。此外，还首次采用了基于二进制数字微镜器件(DMD)的方案，通过精确的幅度和相位控制来整形瓶形光束。此外，我们用全息光钳展示了它们对核壳磁性微粒的光学捕获能力，这种微粒在生物医学研究中发挥着特殊的作用。因此，我们的观察为产生和控制瓶形光束提供了一条新的途径，并将拓宽对吸收粒子、气溶胶甚至单个原子的微观操纵的潜力。
We report, in theory and experiment, on a novel class of controlled light capsules with nearly perfect darkness, directly employing intrinsic properties of modified Bessel-Gauss beams. These beams are able to naturally create three-dimensional bottle-shaped region during propagation as long as the parameters are properly chosen. Remarkably, the optical bottle can be controlled to demonstrate various geometries through tuning the beam parameters, thereby leading to an adjustable light capsule. We provide a detailed insight into the theoretical origin and characteristics of the light capsule derived from modified Bessel-Gauss beams. Moreover, a binary digital micromirror device (DMD) based scheme is first employed to shape the bottle beams by precise amplitude and phase manipulation. Further, we demonstrate their ability for optical trapping of core-shell magnetic microparticles, which play a particular role in biomedical research, with holographic optical tweezers. Therefore, our observations provide a new route for generating and controlling bottle beams and will widen the potentials for micromanipulation of absorbing particles, aerosols or even individual atoms.