Low-loss III-IV photonics and high efficiency grating couplers incorporating low-index AlOx layers

Fwoziah Albeladi; Sara-Jayne Gillgrass; Josie Nabialek; Chris Hodges; Mingchu Tang; Huiwen Deng; Huiyun Liu; Samuel Shutts; Peter Smowton

doi:10.1117/12.3002203

13 March 2024 Low-loss III-IV photonics and high efficiency grating couplers incorporating low-index AlOx layers

Fwoziah Albeladi, Sara-Jayne Gillgrass, Josie Nabialek, Chris Hodges, Mingchu Tang, Huiwen Deng, Huiyun Liu, Samuel Shutts, Peter Smowton

Author Affiliations +

Proceedings Volume PC12889, Integrated Optics: Devices, Materials, and Technologies XXVIII; PC128890K (2024) https://doi.org/10.1117/12.3002203
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We demonstrate a GaAs based Quantum Dot (QD) optoelectronic integration platform with results for surface grating couplers (SGC) and edge emitting lasers. SGCs usually perform poorly in systems without a large refractive index contrast and here we utilize thin oxidized Al0.98Ga0.02As layers to overcome this issue. The results show an increase from 10% to 30% in surface grating coupling efficiency, for the unoxidized compared to oxidized, and substrate-loss decrease from 70% to 20%. Electrically pumped edge-emitting lasers on the same platform exhibit comparable performance to more standard 1300nm QD designs. We describe the design, fabrication and characterization of these devices.

Conference Presentation

Citation Download Citation

Fwoziah Albeladi, Sara-Jayne Gillgrass, Josie Nabialek, Chris Hodges, Mingchu Tang, Huiwen Deng, Huiyun Liu, Samuel Shutts, and Peter Smowton "Low-loss III-IV photonics and high efficiency grating couplers incorporating low-index AlOx layers", Proc. SPIE PC12889, Integrated Optics: Devices, Materials, and Technologies XXVIII, PC128890K (13 March 2024); https://doi.org/10.1117/12.3002203

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