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Journal articles
High structural and optical quality of III-V-on-Si 1.2 nm-thick oxide-bonded hybrid interface
Abstract : In order to be compatiblewith CMOS processing, hybrid bonding of III-V materials on Silicon should be operated
at 300 °C, which requires an interface layer. The thinnest layer could be obtained when surfaces are prepared
oxide-free and activated. We have investigated several activation processes of de-oxidized surfaces and measured
their activation efficiency by X-ray Photoelectron Spectroscopy. We report here on the high structural
and optical quality of a hybrid III-V on Silicon interface obtained by bonding under vacuum at 300 °C deoxidized
surfaces activated by ozone. The resulting oxide interface layer is 1.2-nm thick the thinnest already reported.
Structural characterization of this interface shows no defect in both crystalline lattices. Hybrid shallow
ridge waveguides supporting an optical mode overlapping such an interface show 5 cm−1 propagation losses
comparable to the value measured for monolithic InP-based waveguides or SOI waveguides produced with the
same technology, evidencing the high optical quality of the hybrid interface. Such a thin layer is favorable for
an accurate control of the optical performances within hybrid devices and offers a large versatility for their
design.
https://hal-centralesupelec.archives-ouvertes.fr/hal-01806556
Contributor : David Alamarguy Connect in order to contact the contributor
Submitted on : Sunday, June 3, 2018 - 4:26:25 PM
Last modification on : Tuesday, July 20, 2021 - 3:06:24 AM
Contributor : David Alamarguy Connect in order to contact the contributor
Submitted on : Sunday, June 3, 2018 - 4:26:25 PM
Last modification on : Tuesday, July 20, 2021 - 3:06:24 AM