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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 21 — Jul. 20, 2007
  • pp: 4604–4612

Wide-angle, high-extinction-ratio, infrared polarizing beam splitters using frustrated total internal reflection by an embedded centrosymmetric multilayer

Siva R. Perla and R. M. A. Azzam  »View Author Affiliations


Applied Optics, Vol. 46, Issue 21, pp. 4604-4612 (2007)
http://dx.doi.org/10.1364/AO.46.004604


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Abstract

A centrosymmetric multilayer stack of two transparent thin-film materials, which is embedded in a high-index prism, is designed to function as an efficient polarizer or polarizing beam splitter (PBS) under conditions of frustrated total internal reflection over an extended range of incidence angles. The S ( L H ) k L H L ( H L ) k S multilayer structure consists of a high-index center layer H sandwiched between two identical low-index films L and high-index–low-index bilayers repeated (k times) on both sides of the central trilayer maintaining the symmetry of the entire stack. For a given set of refractive indices, all possible solutions for the thicknesses of the layers that suppress the reflection of p-polarized light at a specified angle, and the associated reflectance of the system for the orthogonal s polarization, are determined. The angular and spectral sensitivities of polarizing multilayer stacks employing 3, 7, 11, 15, and 19 layers of B a F 2 and PbTe thin films embedded in a ZnS prism, operating at λ = 10.6 μ m , are presented. The 15- and 19-layer stack designs achieve extinction ratios (ER) > 30   dB in both reflection and transmission over a 46°–56° field of view inside the prism. Spectral analysis reveals additional discrete polarizing wavelengths other than the design wavelength ( λ = 10.6 μ m ) . The 11-, 15-, and 19-layer designs function as effective s-reflection polarizers ( | R s | 2 > 99 % ) over a 2 3 μ m bandwidth. The effect of decreasing the refractive index contrast between the H and L layers on the resulting ER is also considered.

© 2007 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(230.5440) Optical devices : Polarization-selective devices
(260.5430) Physical optics : Polarization

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: January 24, 2007
Revised Manuscript: March 13, 2007
Manuscript Accepted: March 13, 2007
Published: July 6, 2007

Citation
Siva R. Perla and R. M. A. Azzam, "Wide-angle, high-extinction-ratio, infrared polarizing beam splitters using frustrated total internal reflection by an embedded centrosymmetric multilayer," Appl. Opt. 46, 4604-4612 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-21-4604

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