Positive-negative tunable liquid crystal lenses based on a microstructured transmission line

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Traditional liquid crystal lenses often involve complex fabrication and control.
• Existing methods may require high voltages or multiple power sources.
• Limitations in tunability and fabrication complexity hinder widespread adoption.

Purpose of the Study:

• To propose and demonstrate a novel, simplified technique for fabricating tunable liquid crystal lenses.
• To achieve switchable positive and negative focal lengths with low-voltage control.
• To explore the potential for engineering diverse optical devices using this new method.

Main Methods:

• Development of a liquid crystal lens structure utilizing a transmission line voltage divider.
• Integration of concentric electrodes for homogeneous voltage distribution.
• Experimental demonstration of the proposed lens design and its optical properties.

Main Results:

• Successful fabrication of liquid crystal lenses with tunable positive and negative focal lengths.
• Demonstration of simple, low-voltage control for focal length switching.
• The fabrication process involves a single lithographic step, significantly simplifying production.

Conclusions:

• The proposed technique offers a simplified and efficient approach to creating tunable liquid crystal lenses.
• This method enables low-voltage control and opens possibilities for various optical devices like axicons and beam steerers.
• The technique holds potential for advancing research in liquid crystal-based optical phase modulation.