Zobrazeno 1 - 10
of 71
pro vyhledávání: '"E. P. Raynes"'
Autor:
Tony Wilson, Steve J. Elston, Giovanni Carbone, E. P. Raynes, Edward J. Botcherby, Patrick S. Salter
We introduce a novel imaging technique adopting remote focusing for resolving the axial dynamics in the director field for liquid crystals. The high axial time resolution of our approach is demonstrated by imaging directly the evolution of the direct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a4706c238cd13fd16296ae9f139d09a
https://doi.org/10.1103/physrevlett.103.257803
https://doi.org/10.1103/physrevlett.103.257803
Publikováno v:
Physical Review E
An achiral fixed bent-core nematic liquid crystal in an antiparallel aligned planar device is observed to form three distinct domains. Regions are observed which are achiral planar, as well as domains displaying both positive and negative chirality t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::376a48b03e48e95319f393f116d7b739
https://doi.org/10.1103/physreve.80.031701
https://doi.org/10.1103/physreve.80.031701
We present a fast and accurate method for measurement of the twist elastic constant of nematic liquid crystals using pi-cell devices. We observe that there are two bifurcations during the transition from the bend state to the planar 180° twisted sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b7ea38f1897b4b11b325150edd82003
https://ora.ox.ac.uk/objects/uuid:730a5a6c-498c-44f2-ab16-ba228a08a71a
https://ora.ox.ac.uk/objects/uuid:730a5a6c-498c-44f2-ab16-ba228a08a71a
The influence of the polymer network on the dynamic switching behaviour of polymer-stabilised pi-cell devices is investigated in detail. The stabilisation technique is shown experimentally to increase the relaxation and switch-on times of the device
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6ae930ba484e9c71aed341235c132a5
https://doi.org/10.1080/15421400701739089
https://doi.org/10.1080/15421400701739089
Publikováno v:
Biographical Memoirs of Fellows of the Royal Society. 53:127-141
Sivaramakrishna Chandrasekhar died at the age of 73 years at his home in Bangalore. This sad news came from Chandrasekhar's daughter, Indira. She wrote: ‘My father had a mild heart attack followed by a stroke at the end of January, but he was recov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7dca3673d83749181c2db597ddb4ab3
https://doi.org/10.1098/rsbm.2007.0015
https://doi.org/10.1098/rsbm.2007.0015
Autor:
E. P. Raynes
Publikováno v:
Liquid Crystals. 33:1215-1218
A novel method is described for the measurement of long pitch lengths in chiral nematic liquid crystals using the bowing of reverse twist disclination lines in 90° twisted nematic devices. The method has been used to measure pitch lengths of up to 5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::685d49507bb20367ef40e499bd11d2be
https://doi.org/10.1080/02678290601008505
https://doi.org/10.1080/02678290601008505
Autor:
E. P. Raynes, P. D. Brimicombe
Publikováno v:
Liquid Crystals. 32:1273-1283
We present a detailed discussion of the relaxation of splayed states in untwisted devices — the asymmetric H state (Ha), and the recently observed symmetric H state (Hs). Experimental evidence suggests that the Hs does not experience the optical bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80350c3047df7263605ed120be256dd0
https://doi.org/10.1080/02678290500303072
https://doi.org/10.1080/02678290500303072
Publikováno v:
Journal of Physics D: Applied Physics. 38:1470-1477
An examination of an active waveplate device using a one-dimensional model, giving numerical and analytical results, is presented. The model calculates the director and twist configuration by minimizing the free energy of the system with simple homeo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86b22f3ea626f70c34ef4eb381f71285
https://doi.org/10.1088/0022-3727/38/9/022
https://doi.org/10.1088/0022-3727/38/9/022
Publikováno v:
Journal of Physics D: Applied Physics. 38:376-384
An examination of the characteristics of the cartwheel cell in the presence of an in-plane electric field using a three-dimensional mathematical model to simulate dynamic and static effects is presented. Electrode patterns are modelled that mimic the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd576cc5948c8f4c699d90acf56d9946
https://doi.org/10.1088/0022-3727/38/3/004
https://doi.org/10.1088/0022-3727/38/3/004
Autor:
E. P. Raynes, N. Dessaud
Publikováno v:
Molecular Crystals and Liquid Crystals. 410:475-485
Polymer Stabilised Liquid Crystal (PSLC) devices contain a polymer network (PN) formed from a liquid crystal host containing a low concentration of reactive liquid crystalline monomers. If a strongly UV absorbing liquid crystal is used, the UV intens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d0b612991993acd3a49606480c78825
https://doi.org/10.1080/15421400490433523
https://doi.org/10.1080/15421400490433523