Nonstationary photonic jet from dielectric microsphere
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- 作者：Yuri E. Geints ; Ekaterina K. Panina ; 袗lex ; er 袗. Zemlyanov
- 关键词：Dielectric microsphere ; Photonic jet ; Time-dependent scattering ; Resonances of the optical field
- 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
- 出版年：December, 2013
- 年：2013
- 卷：131
- 期：Complete
- 页码：146-152
- 全文大小：1013 K
文摘
A photonic jet commonly denotes the specific spatially localized region in the near-field forward scattering of a light wave at a dielectric micron-sized particle. We present the calculations of the transient response of an airborne silica microsphere illuminated by a femtosecond laser pulse. The spatial area constituting the photonic jet is theoretically investigated and the temporal dynamics of jet dimensions as well as of jet peak intensity is analyzed. The role of morphology-dependent resonances in jet formation is highlighted. The evolution scenario of a nonstationary photonic jet generally consists of the non-resonant and resonant temporal phases. In every phase, the photonic jet can change its spatial form and intensity.