Elliptical polarization. Linear polarization the two orthogonal components are in phase.

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Elliptical polarization
Presentation transcript:

Elliptical polarization

Linear polarization the two orthogonal components are in phase

Circular polarization the two orthogonal components have same amplitude and are +/-90 degrees out of phase.

Elliptical polarization the two components are not in phase and either do not have the same amplitude and/or are not 90 degrees out of phase

Wave plate Optical device : a birefringent crystal with a chosen thickness Light polarized along the extraordinary/fast axis propagates faster than the ordinary/slow axis. Phase shift Δn : birefringence L : thickness of the crystal

Wave plate (cont.) half-wave plate : retards 180 degrees, rotates the polarization direction of linear polarized light quarter-wave plate : retards 90 degrees, changes linearly polarized light to circular.

Jones calculus Polarized light is represented by a Jones vector, and linear optical elements are represented by Jones matrices.

Example: A half-wave plate: A quarter-wave plate:

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