lecture8 - Lecture 8 State of polarization (SOP) P - state...

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Lecture 8 State of polarization (SOP) • P - state • R -state • L - state • E Polarized light, randomly polarized light and partially polarized light Polarizers and analyzers Application of polarizers and analyzers Four physical processes for polarizing light
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Review of Uniform Plane Waves Uniform plane wave is a constant frequency wave whose wavefronts (surfaces of constant phase) are infinite parallel planes of constant amplitude normal to the phase velocity vector and the electric and magnetic intensities have constant amplitude over the equiphase surfaces. Fields have no dependence on the transverse coordinates x, y and are functions only of z, t
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Perpendicular Polarization • E in POI, H in || POI Perpendicular polarization Transverse electric (TE) waves s wave or s component, German word: senkrent • E in || POI, H in POI Parallel polarization Transverse magnetic (TM) waves p wave or p component, || German word: parallel
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k i k r k t Perpendicular polarization, TE, s wave or s component, (senkrent) Parallel polarization, TM, p wave or p component, || (parallel)
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Plane of incidence: A plane defined by normal n i and wave vector k i Vectors n i , k i , k r and k t are on the same plane i.e., plane of incidence k i k t k r i r t n i n t r 90 i n i
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State of Polarization (SOP) Waves propagating in +z direction 1. Randomly polarized light: E xo , E yo , random variables Light from sun, LED’s, thermal sources etc. 2. Polarized light: E xo , E yo , deterministic variables Light from most lasers or light transmitted thru or reflected by polarizers ) t kz cos( E y ˆ ) t kz cos( E x ˆ ) t , z ( y ˆ ) t , z ( x ˆ ) t , z ( yo xo y x E E E x y E E x E y +z points toward you . z
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P State, planely polarized light, or linearly polarized light  0 ,  , 2 , 3 , … E x and E y are in time phase or two phase angles differ by m Waves propagate in +z direction E and k vectors are on the same plane all the time What if   ±  ±3 , etc.? ) 0 t kz cos( E ) t , z ( ) t kz cos( E ) t , z ( yo y xo x E E . z = 0 or ± 2 etc.
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P State, planely polarized light, or linearly polarized light ) 0 t kz cos( E ) t , z ( ) t kz cos( E ) t , z ( yo y xo x E E = 0 or ± 2 etc.
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This note was uploaded on 02/12/2012 for the course ECE 414 taught by Professor Alenxendra during the Spring '11 term at Purdue University-West Lafayette.

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lecture8 - Lecture 8 State of polarization (SOP) P - state...

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