Longitudinal Lorentz force on a subwavelength-diameter optical fiber

Huakang Yu, Wei Fang, Fuxing Gu, Min Qiu, Zongyin Yang, Limin Tong
2011 Physical Review A. Atomic, Molecular, and Optical Physics  
We analyze the longitudinal Lorentz forces that a propagating continuous-wave light exerts on a subwavelengthdiameter optical fiber. Our theoretical results show that, during the propagating process, the guided light exerts no net time-averaged force on the fiber. Via numerical simulation, we find a significant overall pull force of 0.4 pN/mW acting on a 450-nm-diam fiber tip at a wavelength of 980 nm due to the scattering of the end face and a calculated force distribution reveals the feature
more » ... f a near-field accumulation. Our results may be helpful to the configuration of optomechanical components or devices based on these fibers.
doi:10.1103/physreva.83.053830 fatcat:dxjwp4yhfrbohgtxxqxfty747a