Deep learning for the design and characterization of high efficiency self-focusing grating

We demonstrate that the deep learning algorithm can considerably simplify the design and characterization of high efficient self-focusing varied line-spaced gratings. Our neural network is implemented with a recovery rate of up to 94% for the transmission function parameters. With numerical simulations, and optical experiments, we show that the self-focusing varied line-spaced gratings designed in such a way are endowed with enhanced functionalities, such as the intensity of first-order diffraction peak being enhanced with around a factor of 30 compared with the incident intensity, and a high ratio (about 60) between the peak intensity of the first order and the intensity of the zero-order. Our results allow the rapid design and characterization of self-focusing varied line-spaced gratings as well as optimal microstructures for targeted far-field diffraction patterns, which are playing key roles in spectroscopy and monochromatization applications.

Diffraction grating, Neural network, Optical structures design, Self-focusing

10.1016/j.optcom.2022.127951

0030-4018

Pu, Tanchao

89eb5a37-31bf-469a-ae29-c871d5d25c65

Cao, Fulin

f7d7ac99-73df-4d91-8da2-9fe1099cd373

Liu, Ziwei

3cbbfc31-2982-40e7-b3f5-0ded2d281e20

Xie, Changqing

e46346b9-56b3-44cb-9533-0a67428a9e4a

1 May 2022

Pu, Tanchao

89eb5a37-31bf-469a-ae29-c871d5d25c65

Cao, Fulin

f7d7ac99-73df-4d91-8da2-9fe1099cd373

Liu, Ziwei

3cbbfc31-2982-40e7-b3f5-0ded2d281e20

Xie, Changqing

e46346b9-56b3-44cb-9533-0a67428a9e4a

Pu, Tanchao, Cao, Fulin, Liu, Ziwei and Xie, Changqing (2022) Deep learning for the design and characterization of high efficiency self-focusing grating. Optics Communications, 510, [127951]. (doi:10.1016/j.optcom.2022.127951).

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Accepted/In Press date: 10 January 2022

Published date: 1 May 2022

Additional Information: Funding Information: T. Pu thanks the valuable discussion with Dr. N. Papasimakis from University of Southampton, UK and acknowledges the financial support from Chinese Scholarship Council (CSC No. 201804910540 ). Funding Information: This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0206002 ); National Natural Science Foundation of China (Grant Nos. U1832217 , 61804169 , and 61821091 ). Publisher Copyright: © 2022 Elsevier B.V.

Keywords: Diffraction grating, Neural network, Optical structures design, Self-focusing

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