Photonic integrated circuit (PIC) technology holds great potential for breaking through the bottlenecks in current photonic and optoelectronic networks. Recently, a revolution has been witnessed in the field of lithium niobate (LN) photonics. Over the past decade, nanoscale LN waveguides with a propagation loss of ~0.01 dB and a radius of curvature on the level of ~100 μm have been demonstrated. The revolution mainly benefits from two technological advancements, the maturity of lithium-niobate-on-insulator (LNOI) technology and the innovation of nanofabrication approaches of high-quality LNOI photonic structures. Using low-loss waveguides and high-quality-factor (high-Q) microresonators produced on the LNOI platform as building blocks, various integrated photonic devices have been demonstrated with unprecedented performances. The breakthroughs have reshaped the landscape of the LN industry.
This is the first monograph on LN nanophotonics enabled by the LNOI platform. It comprehensively reviews the development of fabrication technology, investigations on nonlinear optical processes, and demonstrations of electro-optical devices, as well as applications in quantum light sources, spectroscopy, sensing, and microwave-to-optical wave conversion. The book begins with an overview of the technological evolution of PICs, justifying the motivation for developing LNOI photonics. The next four chapters focus on LNOI photonics. The book concludes with a summary of the milestone achievements discussed in these chapters and provides a future perspective of this area of research.
Author(s): Ya Cheng
Publisher: Jenny Stanford Publishing
Year: 2021
Language: English
Pages: 200
City: Singapore
Cover
Half Title
Title Page
Copyright Page
Dedication Page
Contents
Preface
1. Introduction
2. Fabrication Technology of Photonic Structures on Lithium-Niobate-on-Insulator
2.1 Introduction
2.2 Fabrication Technique of LNOI Wafers
2.3 Early Achievements on Lithographic Fabrication of LNOI Nanophotonic Structures
2.4 Solutions for Improving the Surface Quality with Ion Dry Etching
2.4.1 Solutions with FIB-Based Fabrication Techniques
2.4.2 Solutions with Ion Milling–Based Fabrication Techniques
2.5 Photolithography-Assisted Chemomechanical Etching Technique
2.6 Fabrication of LNOI Photonic Structures without a Lithographic Patterning LN Thin Film
2.7 Summary
3. Nonlinear Optics in Nanostructures Fabricated on Lithium-Niobate-on-Insulator
3.1 Introduction
3.2 Second Harmonic Generation in LNOI Photonic Structures
3.2.1 Modal Phase-Matched SHG
3.2.2 Quasi-Phase-Matched SHG
3.3 Other Second-Order Nonlinear Processes in LNOI Photonic Structures
3.4 Third-Order Nonlinear Processes in LNOI Photonic Structures
3.5 Comb Generation
3.6 Optomechanics
3.7 Summary and Future Perspectives
4. Integrated Electro-Optic Devices on Lithium-Niobate-on-Insulator
4.1 Introduction
4.2 Electro-Optic Tuning of LNOI Microresonators
4.3 High-Speed LNOI Modulators
4.4 Electro-Optically Tunable Nonlinear Photonic Devices
4.5 Summary and Future Perspectives
5. Integrated Photonics on Lithium-Niobate-on-Insulator: Toward Real-World Applications
5.1 Introduction
5.2 Optical Interfaces and Integrated Photodetectors
5.3 Integrated Electro-Optomechanical Devices
5.4 High-Sensitivity Sensors
5.5 Spectrometers
5.6 Quantum Optical Devices
5.7 Dense Photonic Integration
5.8 Summary and Future Perspectives
6. Summary and Future Perspectives
Index
