Electro-optic switching of dielectrically negative nematic through nanosecond electric modification of order parameter

Abstract

We present experimental studies of nanosecond electric modification of the order parameter

Novel Plasmonic Data Storage Based on Nematic Liquid Crystal Layers

“…Moreover, the response time of NLC switching using nanosecond EMPO (NEMPO) effect is not proportional to its thickness as in regular Frederiks effect. As reported by [15], the response time of NLC material, MAT-08-192 that has relatively similar characteristics to the NLC material, E7 that employed in the proposed storage is equal ~ 1ns. Thereby, the proposed 2-bit storage may offer sequential writing speed of approximately 1 GB/sec.…”

“…As the amplitude of the applied signal increases further, the more alignment is induced on the NLC molecular director. A strong field can realign an NLC rather quickly, within 100 ns [15]. Further, doping the NLC layer by isotropic layers such as zinc oxide nano-particles [20] can be useful for reducing the amplitude of the required voltage.…”

“…As reported in [14], the switching NLC using EMOP effect enables ultrafast response time below 30 ns only for thin CCN-47 cells with 5μm thickness. In addition, nanosecond switching in a number of NLCs with negative dielectric anisotropy is reported in [15]. The proposed nanosecond switching technique is based on using field at the order of ~ 108 V/m that causes uniaxial and biaxial modifications of the order parameter.…”

Nanosecond liquid crystalline technologies for high speed optical communications: electro-optic switching through nanosecond electric modification of order parameter

“…NEMOP effect allows one to achieve fast nanosecond switching times in the range on tens of nanoseconds, in both field-on and off regimes [3] as demonstrated on Figure 1(a), as well as FoM on the order of 42 10 μm /s . In the demonstrated effect, we used an NLC with a negative dielectric anisotropy…”

“…The speed of switching can be accelerated by a variety of approaches [1], such as optimizing the viscoelastic parameters of the NLCs or overdriving. Recently, a different approach to change the optical retardance of the NLC has been proposed [2], based on nanosecond electric modification of the order parameter (NEMOP) [2,3].…”