Integration of GaAs MESFETs and lithium niobate optical switches using epitaxial lift-off

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Abstract
The first successful integration of GaAs MESFETs and lithium niobate optical switches using the epitaxial lift-off technique is reported. The interferometric switch produced an extinction ratio >30 dB at 1300 nm for an input voltage swing to the MESFET of only 240 mV. This realisation holds out interesting prospects for the development of novel, efficient and cost-effective quasi-monolithic integrated optoelectronic circuits.