TY - JOUR
T1 - Interferometric method for the measurement of the flexoelectric polarisation using nematic liquid crystal phase gratings
AU - Trabi, C.L.
AU - Smith, A.A.T.
AU - Brown, C.V.
PY - 2009/9/3
Y1 - 2009/9/3
N2 - An interferometric method using a nematic liquid crystal phase grating has recently been developed for determining the sum of the flexoelectric coefficients, (e1 + e3) [C. Trabi, C. V. Brown, A. A. T. Smith and N. J. Mottram, Appl. Phys. Lett. 92, 223509 (2008)]. The switching response of the device can be simulated if the applied 0.2 Hz squarewave voltage in the nematic layer is modified so that it is enhanced by a reverse ion-field after each polarity reversal and then decays with time. This process has been investigated using measurements of the transient capacitance of a planar nematic layer to the same waveform.
AB - An interferometric method using a nematic liquid crystal phase grating has recently been developed for determining the sum of the flexoelectric coefficients, (e1 + e3) [C. Trabi, C. V. Brown, A. A. T. Smith and N. J. Mottram, Appl. Phys. Lett. 92, 223509 (2008)]. The switching response of the device can be simulated if the applied 0.2 Hz squarewave voltage in the nematic layer is modified so that it is enhanced by a reverse ion-field after each polarity reversal and then decays with time. This process has been investigated using measurements of the transient capacitance of a planar nematic layer to the same waveform.
KW - dielectrics
KW - diffraction optical element
KW - nematic liquid crystals
KW - transient capacitance
UR - http://dx.doi.org/10.1080/15421400903066125
U2 - 10.1080/15421400903066125
DO - 10.1080/15421400903066125
M3 - Article
SN - 1542-1406
VL - 509
SP - 1120
EP - 1134
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
ER -