Acta Optica Sinica, Volume. 16, Issue 4, 389(1996)
Energy Conservation of Beam Cross-Section and Energy Diffraction Divergence
We prove that, for any stable propagating monochromatic scalar beam in vacuum, the radial component E and the z component E of the beam cross-section energy are invariances and independent of the position of the cross- section if the evanescent waves of the plane-wave spectrum of the beam are ignored. The expressions of x and y component of beam energy diffraction divergence are derived.
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[in Chinese], [in Chinese], [in Chinese]. Energy Conservation of Beam Cross-Section and Energy Diffraction Divergence[J]. Acta Optica Sinica, 1996, 16(4): 389