Liquid Crystals in Photonics

Dear Colleagues,

Liquid crystals are a state of matter that exhibit both fluid- and solid-like properties. They are unique in that they have both long-range order, meaning that the molecules are aligned in a specific orientation, and short-range disorder, indicating a random arrangement of the molecules within each orientation. This combination of order and disorder leads to distinctive optical properties that make liquid crystals useful for a range of photonic applications.

A well-known application of liquid crystals is in liquid crystal displays (LCDs), where they are used to produce colors and images in electronic devices, such as smartphones, televisions, and computers. In an LCD, an electric current is applied to the liquid crystal molecules, causing them to align and produce a specific color or image. The widespread use of LCDs in modern technology has made liquid crystals a major contributor to the field of liquid crystal photonics. In addition to LCDs, liquid crystals have been used for various other photonic applications. For example, they have been integrated into optical communication systems, where they can be used as tunable filters to control the wavelength of light. They have also been employed as sensors, where changes in the alignment of the liquid crystal molecules can be used to detect various physical and chemical parameters, as well as in laser technology, where they can be used to control the polarization and direction of laser beams.

Overall, liquid crystal photonics is a rapidly growing and evolving area of research, with novel applications and advancements continuously being developed. The unique optical properties of liquid crystals, combined with their versatility and ease of integration into various photonic systems, make them a valuable tool for researchers and engineers in the field of photonics.

Several key topics in the field of liquid crystals in photonics include the following:

• Liquid crystal displays and their technological advancements;
• Liquid crystal-based optical communication systems;
• Liquid crystal-related AR/VR technologies;
• Liquid crystal sensors and their applications in different fields;
• Liquid crystal laser technology and its potential applications;
• Properties of liquid crystals and their impact on photonic applications;
• Theoretical and computational studies of liquid crystals in photonics.

Dr. Xiayu Feng
Dr. Yannanqi Li
Guest Editor

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