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Perfect blazing with echelle gratings in TE and TM polarization |
Optics Letters, Vol. 37, Issue 6, pp. 1002-1004 (2012)
http://dx.doi.org/10.1364/OL.37.001002
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Abstract
Perfect blazing with echelle gratings in a high-order Littrow mount exists not only with TM polarization, as can perhaps be assumed, but also with TE and TM polarizations simultaneously. This finding contradicts with a heuristic explanation as to why perfect blazing is not possible simultaneously in TE and TM polarizations given by Loewen and Popov [Diffraction Gratings and Applications (Marcel Dekker, 1997)]. As a matter of fact, in the ideal case of infinite conductivity, light is diffracted in the Littrow order with 100% efficiency for both polarization states. For metal gratings, a small loss occurs. Three conditions are necessary for perfect blazing: (A) the apex angle must be very close to 90°, (B) a specific Littrow order has to be used, and (C) the blaze angle has to be 4° to 6° larger than the Littrow angle. The last property is particularly intriguing because typically the difference between the two angles is smaller than 1.0°.
© 2012 Optical Society of America
OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
ToC Category:
Diffraction and Gratings
History
Original Manuscript: November 28, 2011
Revised Manuscript: January 29, 2012
Manuscript Accepted: January 31, 2012
Published: March 6, 2012
Citation
Bernd H. Kleemann, "Perfect blazing with echelle gratings in TE and TM polarization," Opt. Lett. 37, 1002-1004 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-6-1002
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