Effect of spatial coherence on radiation forces acting on a Rayleigh dielectric sphere |
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Authors: | Wang Li-Gang Zhao Cheng-Liang Wang Li-Qin Lu Xuan-Hui Zhu Shi-Yao |
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Affiliation: | Department of Physics, Zhejiang University, Hangzhou, China. sxwlg@yahoo.com.cn |
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Abstract: | We show that the radiation forces (RFs) on a Rayleigh dielectric sphere induced by a partially coherent light beam are greatly affected by the spatial coherence. We find that the magnitude of the RFs greatly decreases as the spatial coherence decreases and derive an inequality for the required correlation width sigma(0) (i.e., the spatial coherence of the beam) to stably trap the particles. |
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