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IEEE Photonics Technology Letters

Classical and Quantum Experiments Using Hybrid Si3N₄-LiNbO₃ Photonic Chip

Hyungjun Heo, Kiwon Kwon, Donghwa Lee, Hyeong‐Soon Jang, Sangin Kim, Heedeuk Shin, Yong‐Su Kim, Sang-Wook Han, Hojoong Jung

Published Jan 3, 2025• 3 citations
Publisher

Abstract

We fabricated various optical devices on a hybrid Si3N4–LiNbO3platform for integrated quantum photonic circuits and observed Hong–Ou–Mandel (HOM) quantum interference. Strip-loaded waveguides were prepared via Si3N4deposition on LiNbO3. Consequently, fundamental building blocks for quantum photonics, such as ring resonators, various beam splitters, and Mach–Zehnder interferometers, were fabricated and tested. Using 50:50 beam splitters, we observed HOM quantum interference and achieved a visibility of 96.6 ± 1.2% after the subtraction of accidental counts. More advanced quantum-integrated devices are expected to be realized using the proposed hybrid platform.

DOI
10.1109/lpt.2024.3525396

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