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Updated: Jan 30, 2026
07:23
Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics
Published on: February 5, 2020
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Optofluidic platform using liquid crystals in lithium niobate microchannel.
Silvio Bonfadini1,2, Fabrizio Ciciulla3, Luigino Criante4
1Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Milano, 20133, Italy.
Scientific Reports
|February 2, 2019
Summary
We show all-optical control of liquid crystal orientation in microfluidic devices using lithium niobate. This novel optofluidic approach utilizes light-induced fields for precise molecular alignment.
Area of Science:
- Optofluidics
- Materials Science
- Nonlinear Optics
Background:
- Nematic liquid crystals (NLCs) are widely used in optical devices.
- Controlling molecular orientation is crucial for NLC device performance.
- Microfluidic devices offer precise control over fluid environments.
Purpose of the Study:
- To demonstrate all-optical control of NLC molecular orientation.
- To investigate the use of microfluidic channels in lithium niobate.
- To explore the combined effects of photovoltaic and pyroelectric fields on NLCs.
Main Methods:
- Fabrication of microfluidic channels in lithium niobate using femtosecond laser micromachining.
- Confining nematic liquid crystals within these microchannels.
- All-optical manipulation of molecular orientation using pump light.
Main Results:
- Achieved all-optical control over nematic liquid crystal molecular orientation.
- Demonstrated the combined photovoltaic and pyroelectric field effects for the first time.
- Showcased the tunability of the space charge field by controlling pump light direction and intensity.
Conclusions:
- Liquid crystals and lithium niobate are effectively combined in microfluidic configurations.
- This work paves the way for novel optofluidic devices.
- All-optical control offers a promising method for manipulating liquid crystal orientation.
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