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Optical lift from dielectric semicylinders

机译:介电半圆柱体的光学提升

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摘要

A wave optics numerical analysis of the force and torque on a semicylindrical optical wing is presented. Comparisons with a recently reported ray optics analysis indicate good agreement when the radius is large compared with the wavelength of light, as expected. Surprisingly, we find that the dominant rotationally stable angle of attack at α ≈ -15° is relatively invariant to changes in radius and refractive index. However, the torsional stiffness at the equilibrium point is found to increase, approximately, as the cubic power of the radius. Quasi-resonant internal modes of light produce complex size-dependent variations of the angle and magnitude of the optical lift force.
机译:提出了半圆柱状机翼上力和转矩的波光学数值分析。与最近报道的射线光学分析的比较表明,当半径比预期的大时,与光的波长相比,一致性很好。出乎意料的是,我们发现在α≈-15°时,主要的旋转稳定攻角相对于半径和折射率的变化相对不变。然而,发现在平衡点处的扭转刚度大约随着半径的三次方而增加。光的准谐振内部模式会产生与光学升降力的角度和大小有关的,取决于大小的复杂变化。

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