Binary gratings with random heights



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Rico-García, José María and Sánchez Brea, Luis Miguel (2009) Binary gratings with random heights. Applied Optics, 48 (16). pp. 3062-3069. ISSN 1559-128X

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We analyze the far-field intensity distribution of binary phase gratings whose strips present certain randomness in their height. A statistical analysis based on the mutual coherence function is done in the plane just after the grating. Then, the mutual coherence function is propagated to the far field and the intensity distribution is obtained. Generally, the intensity of the diffraction orders decreases in comparison to that of the ideal perfect grating. Several important limit cases, such as low- and high-randomness perturbed gratings, are analyzed. In the high-randomness limit, the phase grating is equivalent to an amplitude grating plus a “halo.” Although these structures are not purely periodic, they behave approximately as a diffraction grating.

Item Type:Article
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Received 27 January 2009; revised 29 April 2009; accepted 3 May 2009; posted 7 May 2009 (Doc. ID 106838); published 22 May 2009.

Uncontrolled Keywords:Far-Field ; Polarization gratings ; Light-scattering ; Difraction ; Demultiplexer ; Coherence and statistical optics
Subjects:Sciences > Physics
Sciences > Physics > Optics
ID Code:38636
Deposited On:08 Sep 2016 10:44
Last Modified:08 Sep 2016 10:44

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