Carfagno, HenryGuidry, Melissa A.Yang, JoshuaMcCabe, LaurenZide, Joshua M. O.Vučković, JelenaDoty, Matthew F.2023-07-062023-07-062023-05-17Carfagno, Henry, Melissa A. Guidry, Joshua Yang, Lauren McCabe, Joshua M. O. Zide, Jelena Vučković, and Matthew F. Doty. “Inverse Designed Couplers for Use in Gallium Arsenide Photonics.” ACS Photonics 10, no. 5 (May 17, 2023): 1286–92. https://doi.org/10.1021/acsphotonics.2c01864.2330-4022https://udspace.udel.edu/handle/19716/32970This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © 2023 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsphotonics.2c01864. This article will be embargoed until 05/17/2024.Highly efficient photonic couplers are a necessary component of a scalable platform to couple quantum emitters into quantum fiber networks. We inverse-designed couplers for use in gallium arsenide membrane-based photonics that are compatible with indium arsenide quantum dots, one of the highest quality quantum light sources available. We fabricated and tested at least 4 instances of devices following 11 different designs. All inverse-designed structures outperformed the traditional grating outcoupler in a single-mode optical fiber optical setup. Using a novel sleeve and bulk fabrication method allowed for a smaller allowable minimum feature size constraint in the inverse design optimization protocol. Employing this new design constraint improved the average device transmission efficiency from 17.4% to 27.5%. The use of broadband optimization criteria did not result in statically significant improvement in actual bandwidth, but did decrease the variance in the measured bandwidth, suggesting a more robust design.en-USphotonicsinverse designgallium arsenide photonicscouplersArticle