Abstract
Evanescent- and propagating-field distributions from a strongly-focused-wave beam with subwavelength waist as a function of polar angle and distance are investigated. Exact amplitudes and intensities of evanescent and propagating fields, including interference terms, are presented both in near- and far-field regions. It is shown that the amplitude of decays as in the near-field region and that evanescent waves do not contribute to the far field in the forward direction as they do in the transverse directions even though the oscillating evanescent field of the same strength but opposite in sign to the propagating field exists in the transverse plane.
© 2003 Optical Society of America
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