Tunable subwavelength resonant grating filter

Details Tunable subwavelength resonant grating filter Tunable subwavelength resonant grating filter

2006-02-14

2006-02-14

Kim, Robert H. (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Beam dividing switch formed from liquid crystal cell

C385S037000

Reexamination Certificate

active

06999156

ABSTRACT:
In accordance with the invention, a tunable subwavelength resonant grating filter comprises a liquid crystal cell having a pair of major surface walls. One wall of the cell is a coated subwavelength grating of a SRGF. The coating comprises a polymer layer to fill the grating trenches and a surfactant layer to facilitate uniform alignment of the liquid crystal material. The refractive index of the LCD material in the cell can then be electrically or thermally adjusted to tune the resonant wavelength.

REFERENCES:
patent: 5299289 (1994-03-01), Omae et al.
patent: 5598300 (1997-01-01), Magnusson et al.
patent: 6118586 (2000-09-01), Tanabe et al.
patent: 6215928 (2001-04-01), Friesem et al.
patent: 6552842 (2003-04-01), Simpson et al.
patent: 6661952 (2003-12-01), Simpson et al.

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