PMID- 25375512
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150511
LR  - 20141107
IS  - 1550-2376 (Electronic)
IS  - 1539-3755 (Linking)
VI  - 90
IP  - 4
DP  - 2014 Oct
TI  - Optics of short-pitch deformed-helix ferroelectric liquid crystals: symmetries, 
      exceptional points, and polarization-resolved angular patterns.
PG  - 042504
AB  - In order to explore electric-field-induced transformations of polarization 
      singularities in the polarization-resolved angular (conoscopic) patterns emerging 
      after deformed-helix ferroelectric liquid crystal (DHFLC) cells with 
      subwavelength helix pitch, we combine the transfer matrix formalism with the 
      results for the effective dielectric tensor of biaxial FLCs evaluated using an 
      improved technique of averaging over distorted helical structures. Within the 
      framework of the transfer matrix method, we deduce a number of symmetry relations 
      and show that the symmetry axis of L lines (curves of linear polarization) is 
      directed along the major in-plane optical axis which rotates under the action of 
      the electric field. When the angle between this axis and the polarization plane 
      of incident linearly polarized light is above its critical value, the C points 
      (points of circular polarization) appear in the form of symmetrically arranged 
      chains of densely packed star-monstar pairs. We also emphasize the role of phase 
      singularities of a different kind and discuss the enhanced electro-optic response 
      of DHFLCs near the exceptional point where the condition of zero-field isotropy 
      is fulfilled.
FAU - Kiselev, Alexei D
AU  - Kiselev AD
AD  - Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong 
      Kong and Institute of Physics of National Academy of Sciences of Ukraine, 
      prospekt Nauki 46, 03680 Kiev, Ukraine.
FAU - Chigrinov, Vladimir G
AU  - Chigrinov VG
AD  - Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong 
      Kong.
LA  - eng
PT  - Journal Article
DEP - 20141024
PL  - United States
TA  - Phys Rev E Stat Nonlin Soft Matter Phys
JT  - Physical review. E, Statistical, nonlinear, and soft matter physics
JID - 101136452
EDAT- 2014/11/07 06:00
MHDA- 2014/11/07 06:01
CRDT- 2014/11/07 06:00
PHST- 2014/07/13 00:00 [received]
PHST- 2014/11/07 06:00 [entrez]
PHST- 2014/11/07 06:00 [pubmed]
PHST- 2014/11/07 06:01 [medline]
AID - 10.1103/PhysRevE.90.042504 [doi]
PST - ppublish
SO  - Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Oct;90(4):042504. doi: 
      10.1103/PhysRevE.90.042504. Epub 2014 Oct 24.