Finite-aperture wire grid polarizers | Zendy

Michael A. Jensen | Zendy; Gregory P. Nordin | Zendy

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Finite-aperture wire grid polarizers

Author(s) -

Michael A. Jensen,

Gregory P. Nordin

Publication year - 2000

Publication title -

journal of the optical society of america a

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.803

H-Index - 158

eISSN - 1520-8532

pISSN - 1084-7529

DOI - 10.1364/josaa.17.002191

Subject(s) - polarizer , optics , extinction ratio , polarization (electrochemistry) , aperture (computer memory) , materials science , wavelength , extinction (optical mineralogy) , scattering , physics , acoustics , chemistry , birefringence

The transmission characteristics of wire grid polarizers fabricated in finite apertures are investigated by using a three-dimensional finite-difference time-domain formulation. Specifically, the optical transmissivity and extinction ratio are characterized for a wide variety of geometrical parameters including aperture size in both dimensions, conducting wire fill factor, and polarizer thickness. A dispersive material model is used to investigate the performance of polarizers fabricated by using realistic metals at infrared wavelengths. The results indicate that the aperture dimension significantly impacts the polarizer transmission behavior and that the extinction of the unwanted polarization is often limited by depolarizing scattering that is due to the finite aperture size.

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