### Abstract

Theoretical expressions for the internal and external electromagnetic fields for an arbitrary electromagnetic beam incident upon a homogeneous spherical particle are derived, and numerical calculations based upon this theoretical development are presented. In particular, spatial distributions of the internal and near-surface electric field magnitude (source function) for a focused fundamental (TEM_{00} mode) Gaussian beam of 1.06 μm wavelength and 4 μm beam waist diameter incident upon a 5-μm-diam water droplet in air are presented as a function of the location of the beam focal point relative to the sphere center. The calculations indicate that the internal and near-surface electric field magnitude distribution can be strongly dependent upon relative focal point positioning and may differ significantly from the corresponding electric field magnitude distribution expected from plane-wave irradiation.

Original language | English (US) |
---|---|

Pages (from-to) | 1632-1639 |

Number of pages | 8 |

Journal | Journal of Applied Physics |

Volume | 64 |

Issue number | 4 |

DOIs | |

State | Published - Dec 1 1988 |

### Fingerprint

### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

*Journal of Applied Physics*,

*64*(4), 1632-1639. https://doi.org/10.1063/1.341811

**Internal and near-surface electromagnetic fields for a spherical particle irradiated by a focused laser beam.** / Barton, J. P.; Alexander, Dennis R; Schaub, S. A.

Research output: Contribution to journal › Article

*Journal of Applied Physics*, vol. 64, no. 4, pp. 1632-1639. https://doi.org/10.1063/1.341811

}

TY - JOUR

T1 - Internal and near-surface electromagnetic fields for a spherical particle irradiated by a focused laser beam

AU - Barton, J. P.

AU - Alexander, Dennis R

AU - Schaub, S. A.

PY - 1988/12/1

Y1 - 1988/12/1

N2 - Theoretical expressions for the internal and external electromagnetic fields for an arbitrary electromagnetic beam incident upon a homogeneous spherical particle are derived, and numerical calculations based upon this theoretical development are presented. In particular, spatial distributions of the internal and near-surface electric field magnitude (source function) for a focused fundamental (TEM00 mode) Gaussian beam of 1.06 μm wavelength and 4 μm beam waist diameter incident upon a 5-μm-diam water droplet in air are presented as a function of the location of the beam focal point relative to the sphere center. The calculations indicate that the internal and near-surface electric field magnitude distribution can be strongly dependent upon relative focal point positioning and may differ significantly from the corresponding electric field magnitude distribution expected from plane-wave irradiation.

AB - Theoretical expressions for the internal and external electromagnetic fields for an arbitrary electromagnetic beam incident upon a homogeneous spherical particle are derived, and numerical calculations based upon this theoretical development are presented. In particular, spatial distributions of the internal and near-surface electric field magnitude (source function) for a focused fundamental (TEM00 mode) Gaussian beam of 1.06 μm wavelength and 4 μm beam waist diameter incident upon a 5-μm-diam water droplet in air are presented as a function of the location of the beam focal point relative to the sphere center. The calculations indicate that the internal and near-surface electric field magnitude distribution can be strongly dependent upon relative focal point positioning and may differ significantly from the corresponding electric field magnitude distribution expected from plane-wave irradiation.

UR - http://www.scopus.com/inward/record.url?scp=0000688498&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000688498&partnerID=8YFLogxK

U2 - 10.1063/1.341811

DO - 10.1063/1.341811

M3 - Article

VL - 64

SP - 1632

EP - 1639

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 4

ER -