Sökning: "smectic helix"

Hittade 3 avhandlingar innehållade orden smectic helix.

1. 1. Optical properties and helicity in liquid crystals

   Författare :Anders Dahlgren; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; de Vries formula; smectic A*; smectic helix; Poincaré sphere; homeotropic alignment; chiral; light switch; birefringence; electroclinic; diffraction method; indicatrix; phase grating; helial pitch; snisotropy; liquid crystals; smectic C*; handedness; book-shelf geometry; Cano method; ferroelectric; biaxiality; dielectric tensor;

   Sammanfattning : .... LÄS MER

3. 2. On the Optics and Surface Physics of Liquid Crystals

   Författare :Pontus Jägemalm; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; deformed helix; anchoring; short-pitch; SiO; homogeneous models; two-fold degenerate alignment; Berreman; bistable alignment; optical activity;

   Sammanfattning : Good knowledge about optics and surface physics of liquid crystals is indispensable when utilising them for applications, such as liquid crystal displays (LCDs). However, they are also two central subjects in fundamental research on liquid crystals. LÄS MER

4. 3. Optical Investigations of Chiral Liquid Crystals

   Författare :Anders Dahlgren; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; antiferroelectric; de Vries theory; ferroelectric; optical activity; chiral; dielectric tensor; unwinding; liquid crystal; helicoidal; selective reflection;

   Sammanfattning : Optical investigations of course involve experimental work, but a theoretical basis is also needed. The first chapter can hopefully can give the non-expert an insight into the science of liquid crystals. Liquid crystals are optically birefringent, and a review of the phenomenon of birefringence follows in chapter 2. LÄS MER