High efficiency phase grating having a planar reflector

Details High efficiency phase grating having a planar reflector High efficiency phase grating having a planar reflector

2005-12-08

2008-05-27

Allen, Stephone B. (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarization variation over surface of the medium

C359S572000, C359S576000

Reexamination Certificate

active

07379241

ABSTRACT:
An apparatus for processing electromagnetic radiation. The apparatus comprises a dielectric reflector, a plurality of ridges disposed on the dielectric reflector and a plurality of grooves disposed intermediate adjacent ridges to form a diffraction grating. Each of the ridges comprises a first dielectric material disposed on the dielectric reflector having a first index of refraction and a second dielectric material, having a second index of refraction different than the first index of refraction, disposed on the first dielectric material.

REFERENCES:
patent: 2005/0045799 (2005-03-01), Deng et al.
patent: 2005/0231806 (2005-10-01), Barton et al.

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