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- W4361864037 abstract "Understanding and mitigating optical loss is critical to the development of high-performance photonic integrated circuits (PICs). Especially 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 photonic integrated circuits (PIC) platform, probe its origins using X-ray photoemission spectroscopy (XPS) and spectroscopic ellipsometry (SE), and show that it can be mitigated by surface passivation using alumina ($Al_{2}O_{3}$). We also explore potential routes towards achieving passive device performance comparable to state-of-the-art silicon PICs" @default.
- W4361864037 created "2023-04-05" @default.
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- W4361864037 date "2023-03-30" @default.
- W4361864037 modified "2023-09-27" @default.
- W4361864037 title "Quantifying and mitigating optical surface loss in suspended GaAs photonic integrated circuits" @default.
- W4361864037 doi "https://doi.org/10.48550/arxiv.2303.17307" @default.
- W4361864037 hasPublicationYear "2023" @default.
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