Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2007-03-13
2007-03-13
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S573000, C359S486010, C430S321000
Reexamination Certificate
active
10484772
ABSTRACT:
An optical device includes a planar subwavelength grating (10) formed in a dielectric material and having a laterally varying, continuous grating vector. When used to modulate a beam of laterally uniform polarized electromagnetic radiation incident thereon, the device passes the incident beam with a predetermined, laterally varying transmissivity and/or retardation. When used to effect polarization state transformation, the device transforms a beam of electromagnetic radiation incident thereon into a transmitted beam having a predetermined, laterally varying polarization state. The device (214) can be used to provide radially polarized electromagnetic radiation for accelerating subatomic particles or for cutting a workpiece. The device (108) also can be used, in conjuction with a mechanism for measuring the lateral variation of the intensity of the transmitted beam, for measuring all four Stokes parameters that define the polarization state of the incident beam.
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Bomzon Zeev
Hasman Erez
Kleiner Vladimir
Assaf Fayez G.
Friedman Mark M.
Technion Research and Development Foundation Ltd.
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