Question: (a) Consider the electric field diffracted by a circular aperture of radius a using a Kirchoff approximation where E inc = E 0 exp( 2

(a) Consider the electric field diffracted by a circular aperture of radius a using a Kirchoff approximation where E_inc= E₀ exp(−ρ²/ω²)ŷ in the plane of the aperture. Show that the far-zone field still has a Gaussian profile when the beam waist ω << a.
(b) Repeat the calculation for a square aperture with side length a in the same limit and compare to part (a).

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a To find the farzone field also known as the Fraunhofer diffraction pattern of a circular aperture ... View full answer

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