Thermo-dielectric tunability in dual-frequency liquid crystal in both planar-aligned and in-plane switching cells

Sung Guan-Fu^1*, Lee Wei²

¹College of Photonics, National Yang Ming Chiao Tung University, Tainan, Taiwan
²Institute of Imaging and Biomedical Photonics, National Yang Ming Chiao Tung University, Tainan, Taiwan

* Presenter:Sung Guan-Fu, email:grant.sung418@gmail.com

Recent research has garnered significant attention to our newly discovered heating phenomenon induced by pseudo-dielectric relaxation in negative nematic liquid crystal cells. This effect, referred to as pseudo-dielectric heating (PDH), has long been erroneously conflated with dielectric heating (DH) stemming from orientational relaxation in dual-frequency liquid crystal (DFLC). Our preceding study revisited thermally induced dielectric properties in DFLC cells, redefining both DH and PDH in DFLC cells manifested by two temperature-increasing frequency regions at low and high frequencies (of probe or applied AC voltage), respectively. In this study, we theoretically and experimentally delved into thermally induced heating characteristics and thermo-dielectric tunability in DFLC confined in both planar-alignment and in-plane switching cells. Such a captivating exploration not only broadens our understanding of the related physics but also reveals the potential of harnessing these unique physical properties for further creative applications.

Keywords: Dielectric Heating, Dual-Frequency Liquid Crystal, Pseudo-Dielectric Heating, Dielectric Tunability