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Crystals 2018, 8(9), 342; https://doi.org/10.3390/cryst8090342

Simulation and Analysis of Single-Mode Microring Resonators in Lithium Niobate Thin Films

1
College of Electric and Electronic Engineering, Zibo Vocational Institute, Zibo 255314, China
2
School of Physics, Shandong University, Jinan 250100, China
3
College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
4
Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
5
College of General Education, Weifang University of Science and Technology, Weifang 262700, China
*
Author to whom correspondence should be addressed.
Received: 4 August 2018 / Revised: 21 August 2018 / Accepted: 22 August 2018 / Published: 24 August 2018
(This article belongs to the Special Issue Functional Oxide Based Thin-Film Materials)
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Abstract

The single-mode microring resonators on lithium niobate thin films were designed and simulated using 2.5-D variational finite difference time domain mode simulations from Lumerical mode Solutions. The single-mode conditions and the propagation losses of lithium niobate planar waveguide with different SiO2 cladding layer thicknesses were studied and compared systematically. The optimization of design parameters such as radii of microrings and gap sizes between channel and ring waveguides were determined. The key issues affecting the resonator design such as free spectral range and Quality Factor were discussed. The microring resonators had radius R = 20 μm, and their transmission spectrum had been tuned using the electro-optical effect. View Full-Text
Keywords: microring resonator; integrated photonic; varfdtd; electro-optical; LNOI microring resonator; integrated photonic; varfdtd; electro-optical; LNOI
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Han, H.; Xiang, B.; Zhang, J. Simulation and Analysis of Single-Mode Microring Resonators in Lithium Niobate Thin Films. Crystals 2018, 8, 342.

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