Chapter Abstract:
Summary The physical properties of cholesteric liquid crystals (CLCs) are similar to nematics except that the director axis assumes a helical form with a finite pitch p =...Show MoreMetadata
Chapter Abstract:
Summary
The physical properties of cholesteric liquid crystals (CLCs) are similar to nematics except that the director axis assumes a helical form with a finite pitch p = 2π/q0. This chapter summarizes some basic physical properties associated with the helical structure. The evolution of a cholesteric to a nematic liquid crystal may be viewed as the "untwisting" of the helical structure. Most treatments of optical properties of a CLC are discussed for the case where the crystal dimension is assumed to be infinite. Extensive theoretical modeling/simulations have advanced understanding such field‐induced effects and switching dynamics. Smectic liquid crystals possess a higher degree of order than nematics; they exhibit both positional and directional ordering in their molecular arrangements. The free energy of ferroelectric liquid crystals is more complicated; besides the elastic energy FE, several others play an equally important role in determining the response of the ferroelectric‐liquid crystal to an external field.
Page(s): 73 - 114
Copyright Year: 2022
Edition: 3
ISBN Information:
Rotational Magnetic Field Calculation of Electrical Motors by Incorporating a Modified Anisotropic Vector Hysteresis Model
Jiatong Yin,Yongjian Li,Shuaichao Yue,Hongtao Shi,Jiapeng Zhou
A Temperature Self-Compensating Fiber-Optic Fabry–Perot Sensor for High-Sensitive Vector Magnetic Field Measurement
Rui Pan,Chaopeng Wang,Wenlong Yang,Ji Liu,Liuyang Zhang,Shuang Yu,Haibin Wu,Mingze Zhang
SAW study of structural changes in liquid crystals doped with carbon nanotubes induced by electric and magnetic fields
Peter Bury,Marek Vevericik,Peter Kopcansky,Milan Timko,Zuzana Mitroova
Vector Magnetic Field Sensor Based on Magneto-Sensitive Functionalized Three-Core Fiber Structure
Ronghui Xu,Ruifeng Liu,Yuxin Wei,Chenglong Jiang,Jingyu Lai,Ming Chen,Shiliang Qu,Libo Yuan
Fiber Microcavity Magnetic Field Vector Sensor With Temperature Compensation Using a FBG
Guiyu Wang,Yao Wu,Xinhang Guan,Xuefeng Chen,Xiujuan Yu
Vector Magnetic Field Sensing Investigation Based on Integrated Side-Polished Eccentric-Core Fiber and Magnetic Fluid
Ronghui Xu,Yuxin Wei,Ruifeng Liu,Chenglong Jiang,Jingyu Lai,Ming Chen,Shiliang Qu,Libo Yuan
Vector Magnetic Field Sensor based on Fiber Random Grating coupled with Wavelength-to-time Mapping
Danqi Feng,Run Lei,Ya Gao,Ming Deng
Milli-Tesla Level Magnetic Field Vector Detection Based on YIG Microcavity Optical Sensor
Yanran Wu,Songyi Liu,Yongpan Gao,Daquan Yang
Rotational Power Losses and Vector Loci Under Controlled High Flux Density and Magnetic Field in Electrical Steel Sheets
S. Zurek,T. Meydan
Cross-Field Effect in a Triaxial AMR Magnetometer With Vector and Individual Compensation of a Measured Magnetic Field
Vojtěch Petrucha,Viktor Fúra,Antonín Platil