Polarization effects of diffraction gratings of locally varying depth

Wayne Robert Tompkin; Rene Staub

doi:10.1117/12.310570

18 June 1998 Polarization effects of diffraction gratings of locally varying depth

Wayne Robert Tompkin, Rene Staub

Proceedings Volume 3291, Diffractive and Holographic Device Technologies and Applications V; (1998) https://doi.org/10.1117/12.310570
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

Experimental and theoretical results for linear surface- relief grating structures of locally varying depth are presented. The studied gratings result from the superposition of two linear gratings of uniform depth, an example of which is the superposition of two gratings of slightly different k-vectors. The resulting surface profile can exhibit a relatively large-period modulation in profile form and, thus, in diffraction efficiency having especially interesting polarization properties. This periodic variation in diffraction efficiency yields a typical Moire pattern which is seen to alter as the interrogation conditions are varied. For the case of two combined gratings whose individual surface-relief profiles are described by functions f₁ and f₂, the resultant surface-relief profile is described by f₁ + f₂. The basis functions f₁ and f(subscript 2#/ have periods between 0.5 micrometers and 5 micrometers and uniform depths of several hundred nanometers. The basis functions which we studied include sinusoidal, blazed and rectangular gratings.

Citation Download Citation

Wayne Robert Tompkin and Rene Staub "Polarization effects of diffraction gratings of locally varying depth", Proc. SPIE 3291, Diffractive and Holographic Device Technologies and Applications V, (18 June 1998); https://doi.org/10.1117/12.310570

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