Quantifying and mitigating optical surface loss in suspended GaAs photonic integrated circuits

Robert Thomas, Haoyang Li, Jude Laverock, Krishna Coimbatore Balram*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)

Abstract

Understanding and mitigating optical loss is critical to the development of high-performance photonic integrated circuits (PICs). In particular, in high refractive index contrast compound semiconductor (III–V) PICs, surface absorption and scattering can be a significant loss mechanism, and needs to be suppressed. Here, we quantify the optical propagation loss due to surface state absorption in a suspended GaAs PIC platform, probe its origins using x-ray photoemission spectroscopy and spectroscopic ellipsometry, and show that it can be mitigated by surface passivation using alumina (Al2O3).
Original languageEnglish
Article number15
Pages (from-to)3861-3864
Number of pages4
JournalOptics Letters
Volume48
Issue number15
DOIs
Publication statusPublished - 18 Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 OSA - The Optical Society. All rights reserved.

Research Groups and Themes

  • Photonics and Quantum

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