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Photonic Assemblies of Randomly Oriented Nanocrystals for Engineered Nonlinear and Electro-Optic Effects
Viola Valentina Vogler-Neuling1, Artemios Karvounis1, Andrea Morandi1
1ETH Zurich, Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics, 8093 Zurich, Switzerland.
ACS Photonics
|July 26, 2022
Summary
Bottom-up fabrication of photonic assemblies using noncentrosymmetric nanocrystals offers a new route to harness nonlinear and electro-optic properties. These assemblies enable novel photonic integrated devices without etching and over large areas.
Area of Science:
- Materials Science
- Photonics
- Nanotechnology
Background:
- Nonlinear crystals like lithium niobate (LiNbO3) and barium titanate (BaTiO3) possess significant nonlinear and electro-optic properties due to their noncentrosymmetric structure.
- Top-down nanofabrication methods face limitations, driving interest in bottom-up approaches for harnessing these properties.
Purpose of the Study:
- To provide an overview of photonic assemblies created from randomly oriented noncentrosymmetric nanocrystals using bottom-up fabrication.
- To explore the potential of these assemblies for advanced photonic devices and applications.
Main Methods:
- Utilizing bottom-up fabrication techniques to create photonic assemblies from noncentrosymmetric nanocrystals.
- Investigating the formation of tunable objects with varying dimensions and symmetry levels, from thin layers to spheres.
- Analyzing the support of optical modes (Mie or guided) within these assemblies based on their shape.
Main Results:
- Demonstrated the formation of photonic assemblies with tunable dimensions, complexity, and symmetry levels.
- Showcased how assembly shape can tailor linear optical properties and enhance nonlinear and electro-optic responses.
- Identified these assemblies as a disruptive platform for fabricating large-area photonic integrated devices without etching.
Conclusions:
- Assemblies of noncentrosymmetric nanocrystals represent a promising platform for developing novel photonic integrated devices.
- The bottom-up approach offers advantages over traditional nanofabrication, enabling large-scale and etch-free device fabrication.
- Potential applications span various fields, including nano-optics and sensing.
