3D printable compact THz spectral splitters via inverse design

Sourangsu Banerji; Yu Shi; Udayan Ghosh; Vivian Song-En Su; Jacqueline Cooke; Yong Lin Kong; Lei Liu; Berardi Sensale-Rodriguez

doi:10.1117/12.2568149

20 August 2020 3D printable compact THz spectral splitters via inverse design

Sourangsu Banerji, Yu Shi, Udayan Ghosh, Vivian Song-En Su, Jacqueline Cooke, Yong Lin Kong, Lei Liu, Berardi Sensale-Rodriguez

Author Affiliations +

Proceedings Volume 11499, Terahertz Emitters, Receivers, and Applications XI; 114990B (2020) https://doi.org/10.1117/12.2568149
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

In this work, we experimentally demonstrate a 3D printed compact THz spectral splitter based on a single planar broadband diffractive optical element, designed to disperse an incident collimated THz beam (0.5 THz to 0.7 THz) designed with the help of an inverse design technique namely gradient descent assisted binary search algorithm. Aside from the current challenges associated with 3D printing and better measurement facilities, preliminary experimental demonstration highlights the fact that these computationally optimized free space devices could be a significant step towards enabling new types of compact THz spectral splitters or even splitters operating beyond the THz regime.

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Sourangsu Banerji, Yu Shi, Udayan Ghosh, Vivian Song-En Su, Jacqueline Cooke, Yong Lin Kong, Lei Liu, and Berardi Sensale-Rodriguez "3D printable compact THz spectral splitters via inverse design", Proc. SPIE 11499, Terahertz Emitters, Receivers, and Applications XI, 114990B (20 August 2020); https://doi.org/10.1117/12.2568149

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