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Micro-transfer-printed Thin film lithium niobate (TFLN)-on-Silicon Ring Modulator

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posted on 2023-11-29, 17:01 authored by Ying Tan, Shengpu Niu, Maximilien Billet, Nishant Singh, Margot Niels, Tom Vanackere, Joris Van Kerrebrouck, Gunther Roelkens, Bart Kuyken, Dries Van Thourhout
Thin-film lithium niobate (TFLN) has a proven record of building high-performance electro-optical (EO) modulators. However, its CMOS incompatibility and the need for non-standard etching have consistently posed challenges in terms of scalability, standardization, and the complexity of integration. Heterogeneous integration comes to solve this key challenge. Micro-transfer printing of thin-film lithium niobate brings TFLN to well-established silicon ecosystem by easy "pick and place", which showcases immense potential in constructing high-density, cost-effective, highly versatile heterogeneous integrated circuits. Here, we demonstrated for the first time a micro-transfer-printed thin film lithium niobate (TFLN)-on-silicon ring modulator, which is an important step towards dense integration of performant lithium niobate modulators with compact and scalable silicon circuity. The presented device exhibits an insertion loss of -1.5dB, extinction ratio of -37dB, electro-optical bandwidth of 16GHz and modulation rates up to 45Gps.

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