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arXiv 0901.0454physics.opticsphysics.class-phphysics.comp-ph
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Kretschmann几何中共振隧穿激发的回音壁模增强的光学力

Whispering gallery mode enhanced optical force with resonant tunneling excitation in the Kretschmann geometry

J. J. Xiao, J. Ng, Z. F. Lin, C. T. Chan

摘要:

应用边界元法研究了全内反射波激发回音壁模式时的光学力。这种倏逝波在激发高$Q$ WGM时特别有效,而低角度或高径向阶模式被相对抑制。这导致共振和非共振的力之间的大对比,从而允许高尺寸选择性。我们完全纳入棱镜粒子相互作用,并发现,在不同的分离的光学力的行为不同。发现最佳分离对应于强度和$Q$因子之间的折衷。

英文摘要:

The boundary element method is applied to investigate the optical forces when whispering gallery modes (WGMs) are excited by a total internally reflected wave. Such evanescent wave is particularly effective in exciting the high-$Q$ WGM, while the low angular or high radial order modes are suppressed relatively. This results in a large contrast between the forces on and off resonance, and thus allows for high size-selectivity. We fully incorporate the prism-particle interaction and found that the optical force behaves differently at different separations. Optimal separation is found which corresponds to a compromise between intensity and $Q$ factor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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