Broad-band polarization conversion from a finite periodic structure in the microwave regime

Hallam, B.T.; Lawrence, C.R.; Hooper, I.R.; Sambles, J.R.
February 2004
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p849
Academic Journal
A reflection grating demonstrating extraordinarily broad-band polarization conversion in a nondiffractive regime has been studied at microwave frequencies. This single-element structure has been fabricated by electrolessly plating a metallic layer onto a stereo-lithographically produced resin profile. Angle-dependent microwave reflectivity data collected from the grating indicates polarization conversion of greater than 80% over a spectral bandwidth equivalent to the entire visible regime (factor of 2 in frequency). This supports an earlier publication in which it was predicted that a broad-band polarization converter could be created from a suitably profiled diffraction grating. © 2004 American Institute of Physics.


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