【摘要】 基于电磁模型,数值计算了瑞利粒子在贝塞尔光束中所受横向光阱力,给出了粒子所受横向力与粒子的半径、折射率和波长的关系。结果表明,与高斯光束形成的光阱相比,贝塞尔光束既能捕获高折射率粒子也能捕获低折射率粒子,并且有多个平衡位置,因此应用更为广泛。更多还原

【Abstract】 In this paper,the transverse force acting on a Rayleigh-particle in the Bessel beam is calculated based on the elec tromagnetic model.The numerical results give the relationship of the transverse force changing with the radius of the particle, the refractive index and the wavelength,respectively.The results show that the trapping produced by a Bessel beam is better than that of a Gaussian beam,for Bessel beam can trap both high-index and low-index particles and has multi equilibrium positions,which indicates that Bessel beam is more available in control Rayleigh-particles.更多还原