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On the condition of total backward reflection for a diffraction grating on a mirror operating in Littrow mounting
E.A. Bezus 1,2, D.A. Bykov 2,1, L.L. Doskolovich 2,1

1 Samara National Research University,
Moskovskoye Shosse 34, Samara, 443086, Russia;
2 Image Processing Systems Institute, NRC “Kurchatov Institute”,
Molodogvardeyskaya Str. 151, Samara, 443001, Russia

 PDF, 855 kB

DOI: 10.18287/2412-6179-CO-1528

Pages: 362-368.

Full text of article: Russian language.

Abstract:
Optical properties of a structure consisting of a diffraction grating operating in the Littrow geometry, a plane-parallel dielectric layer, and a mirror that completely reflects the incident radiation are considered. A condition is obtained that is imposed on the scattering matrix elements of a diffraction grating, under which, by choosing the thickness of the dielectric layer, it is possible to obtain total backward reflection, i.e., to direct all the energy of the incident wave to the –1st reflected diffraction order. The results of numerical simulations within the framework of the electromagnetic theory of diffraction completely confirm the obtained theoretical results.

Keywords:
diffraction grating, Littrow mounting, Bragg mirror, –1st diffraction order, Fourier modal method.

Citation:
Bezus EA, Bykov DA, Doskolovich LL. On the condition of total backward reflection for a diffraction grating on a mirror operating in Littrow mounting. Computer Optics 2025; 49(3): 362-368. DOI: 10.18287/2412-6179-CO-1528.

Acknowledgements:
This work was partly funded by the Ministry of Science and Higher Education of the Russian Federation within state assignment to Samara University, FSSS-2024-0014 (Theoretical investigation of the possibility of obtaining a zero of the zeroth diffraction order) and NRC “Kurchatov Institute”  (Numerical investigation of an example of the diffractive structure).

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