Inverse Designed Couplers for Use in Gallium Arsenide Photonics

• DOI: 10.1021/acsphotonics.2c01864
• Publication Date: 2023-04-17T17:10:06Z
• Authors: Henry Carfagno; Melissa A. Guidry; Joshua Yang; Lauren McCabe; Joshua M. O. Zide; Jelena Vučković; Matthew F. Doty
• Keywords: photonics; couplers; gallium arsenide photonics; inverse design; 02 engineering and technology; 0210 nano-technology; 530

Highly efficient photonic couplers are a necessary component of scalable platform to couple quantum emitters into fiber networks. We inverse-designed for use in gallium arsenide membrane-based photonics that compatible with indium dots, one the highest quality light sources available. fabricated and tested at least 4 instances devices following 11 different designs. All structures outperformed traditional grating outcoupler single-mode optical setup. Using novel sleeve bulk fabrication method allowed smaller allowable minimum feature size constraint inverse design optimization protocol. Employing this new improved average device transmission efficiency from 17.4% 27.5%. The broadband criteria did not result statically significant improvement actual bandwidth, but decrease variance measured suggesting more robust design.