Angular selectivity of thin gratings

Andris Ozols; Mara Reinfelde

doi:10.1117/12.639328

13 June 2006 Angular selectivity of thin gratings

Andris Ozols, Mara Reinfelde

Proceedings Volume 5946, Optical Materials and Applications; 59461H (2006) https://doi.org/10.1117/12.639328
Event: Optical Materials and Applications, 2005, Tartu, Estonia

Abstract

The angular selectivity of thin gratings is studied both experimentally and theoretically. The concepts of thick and thin gratings are analyzed. Thin holographic gratings recorded in a-As-S-Se films have exhibited pronounced and oscillatory diffraction efficiency angular dependences. These results are explained by the obliquity factor in Fresnel-Kirchhof diffraction integral and by finite beam and grating sizes. It is also shown that oscillatory diffraction efficiency angular dependences, most probably, arise due to the interference of diffracted waves of different orders because dephasing can be significant for small grating strengths and large enough readout angles. Fabry-Perot resonator effect can contribute as well. Thick gratings in a-As₂S₃ and a-As-S-Se films are also studied for comparison. The conclusion is made that normally all gratings possess angular selectivity and existing criterions underestimate the angular selectivity of thin gratings because they neglect factors other than dephasing.

Citation Download Citation

Andris Ozols and Mara Reinfelde "Angular selectivity of thin gratings", Proc. SPIE 5946, Optical Materials and Applications, 59461H (13 June 2006); https://doi.org/10.1117/12.639328

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available