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Design of a Broadband Solar Thermal Absorber Using a Deep Neural Network and Experimental Demonstration of Its Performance.

Abstract：

:In using nanostructures to design solar thermal absorbers, computational methods, such as rigorous coupled-wave analysis and the finite-difference time-domain method, are often employed to simulate light-structure interactions in the solar spectrum. However, those methods require heavy computational resources and CPU time. In this study, using a state-of-the-art modeling technique, i.e., deep learning, we demonstrate significant reduction of computational costs during the optimization processes. To minimize the number of samples obtained by actual simulation, only regulated amounts are prepared and used as a data set to train the deep neural network (DNN) model. Convergence of the constructed DNN model is carefully examined. Moreover, several analyses utilizing an evolutionary algorithm, which require a remarkable number of performance calculations, are performed using the trained DNN model. We show that deep learning effectively reduces the actual simulation counts compared to the case of a design process without a neural network model. Finally, the proposed solar thermal absorber is fabricated and its absorption performance is characterized.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Seo J,Jung PH,Kim M,Yang S,Lee I,Lee J,Lee H,Lee BJ

doi

10.1038/s41598-019-51407-2

subject

Has Abstract

pub_date

2019-10-21 00:00:00

pages

15028

issue

1

issn

2045-2322

pii

10.1038/s41598-019-51407-2

journal_volume

9

pub_type

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