Rodrigues Janderson R, Almeida Vilson R
Instituto Tecnológico de Aeronáutica, São José dos Campos, SP, 12228-900, Brazil.
Instituto de Estudos Avançados, São José dos Campos, SP, 12228-001, Brazil.
Sci Rep. 2017 Oct 30;7(1):14325. doi: 10.1038/s41598-017-14777-z.
Emerging nano-optofluidic devices have allowed a synergetic relation between photonic integrated circuits and microfluidics, allowing manipulation and transport at the realm of nanoscale science. Simultaneously, optical gradient forces have allowed highly precise control of mechanical motion in nano-optomechanical devices. In this report, we show that the repulsive optical forces of the antisymmetric eigenmodes in an optomechanical device, based on a slot-waveguide structure, increases as the refraction index of the fluid medium increases. This effect provides a feasible way to tailor the repulsive optical forces when these nano-optomechanical devices are immersed in dielectric liquids. Furthermore, the total control of the attractive and repulsive optical forces inside liquids may be applied to design novel nanophotonic devices, containing both microfluidic and nanomechanical functionalities, which may find useful applications in several areas, such as biomedical sensors, manipulators and sorters, amongst others.
新兴的纳米光流体装置实现了光子集成电路与微流体之间的协同关系，使得在纳米尺度科学领域进行操控和传输成为可能。同时，光学梯度力实现了对纳米光机械装置中机械运动的高精度控制。在本报告中，我们表明，基于狭缝波导结构的光机械装置中反对称本征模的排斥光力会随着流体介质折射率的增加而增大。当这些纳米光机械装置浸入介电液体中时，这种效应为调整排斥光力提供了一种可行的方法。此外，对液体内部吸引和排斥光力的全面控制可应用于设计新型纳米光子器件，这些器件兼具微流体和纳米机械功能，可能在生物医学传感器、操纵器和分选器等多个领域找到有用的应用。
