Diffraction grating having high throughput efficiency

Details Diffraction grating having high throughput efficiency Diffraction grating having high throughput efficiency

2006-11-21

2006-11-21

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S576000

Reexamination Certificate

active

07139128

ABSTRACT:
A reflective diffraction grating having grooves and ridges and providing high throughput efficiency in the minus-first diffraction order. All but the zeroth diffraction order and the minus-first diffraction order may be prevented from existence by directing the radiation onto the grating at an appropriate angle. The radiation having a TM polarization is eliminated from the zeroth order by destructive interference by appropriate selection of a the groove width of the grating, and radiation having a TE polarization is eliminated from the zeroth order by destructive interference by depositing an overcoat of an appropriate thickness. A dielectric material may be deposited in the grooves.

REFERENCES:
patent: 4281894 (1981-08-01), Guha
patent: 4846552 (1989-07-01), Veldkamp et al.
patent: 5448398 (1995-09-01), Asakura et al.
patent: 5907436 (1999-05-01), Perry et al.
patent: 5925878 (1999-07-01), Challener
patent: 5995285 (1999-11-01), Unno
patent: 5999318 (1999-12-01), Morton et al.
patent: 6157488 (2000-12-01), Ishii
patent: 6162495 (2000-12-01), Morton
patent: 6191890 (2001-02-01), Baets et al.
patent: 6219478 (2001-04-01), Parriaux et al.
patent: 6529321 (2003-03-01), Pan et al.
patent: 92640 (1975-01-01), None
Moharam M G et al., “Rigorous Coupled-Wave Analysis of Metallic Surface-Relief Gratings”, Journal of The Optical Society of America-A, Optical Society of America, Washington, US, vol. 3, No. 11, Nov. 1, 1986, pp. 1780-1787, XP000616808, ISSN.
Roumiguieres J L et al., “On the Efficiencies of Rectangular-Groove Gratings”, Journal of the Optical Society of America, American Institute of Physics. New York, US, vol. 66, No. 8, Aug. 1976, pp. 772-775, XP002963365.

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