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Published in

Optica, Optical Materials Express, 9(12), p. 3731, 2022

DOI: 10.1364/ome.461146

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Gallium phosphide-on-insulator integrated photonic structures fabricated using micro-transfer printing

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Gallium phosphide-on-insulator emerged recently as a promising platform for integrated nonlinear photonics due to its intrinsic material properties. However, current integration solutions, using direct die-to-wafer bonding, do not support spatially localized integration with CMOS circuits which induce a large and expensive footprint material need. Here we demonstrate the transfer of gallium phosphide layers to an oxidized silicon wafer using micro-transfer printing as a new approach for versatile future (hybrid) integration. Using this novel approach, we demonstrate as a proof of concept the fabrication of gallium phosphide-on-insulator ring resonators with Q-factors as high as 35,000.