Heo, Hyungjun Kwon, Kiwon Lee, Donghwa Jang, Hyeong-Soon Kim, Sangin Shin, Heedeuk Kim, Yong-Su Han, Sang-Wook Jung, Hojoong 2025-01-23T07:00:06Z 2025-01-23T07:00:06Z 2025-01-23 2025-02 1041-1135 https://pubs.kist.re.kr/handle/201004/151646 We fabricated various optical devices on a hybrid Si3N4-LiNbO3 platform for integrated quantum photonic circuits and observed Hong-Ou-Mandel (HOM) quantum interference. Strip-loaded waveguides were prepared via Si3N4 deposition 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. English Institute of Electrical and Electronics Engineers Classical and Quantum Experiments Using Hybrid Si3N₄-LiNbO₃ Photonic Chip Article 10.1109/LPT.2024.3525396 1 IEEE Photonics Technology Letters, v.37, no.3, pp.173 - 176 IEEE Photonics Technology Letters 37 3 173 176 N scie 001395305200004 Engineering, Electrical & Electronic Optics Physics, Applied Engineering Optics Physics Article FILM LITHIUM-NIOBATE FREQUENCY COMB GENERATION SILICON-NITRIDE 2ND-HARMONIC GENERATION PHOTONICS CONVERSION Silicon Optical waveguides Interference Resonance Photonics Optical device fabrication Etching Refractive index Optical ring resonators Directional coupler integrated optics lithium niobate Mach-Zehnder interferometer quantum optics silicon nitride silicon nitride