Monodomain Film Formation and Lasing in Dye-Doped Polymer Cholesteric Liquid Crystals

Abstract

We review recent experimental and theoretical work aimed to understand the reaction dynamics of hydrogen molecules at metal surfaces. Diffraction experiments and calculations using ab initio determined six-dimensional potential energy surfaces were carried out on several single-crystal surfaces: NiAl(110), Pt(111), Pd(111) and Pd(110). We discuss the general trends observed in the energy range studied (20-150 meV) when going from nonreactive to very reactive surfaces as well as specific features of the dynamics which can be seen in diffraction studies.

Organic solid‐state integrated amplifiers and lasers

“…In the latter emission is produced from a mode situated directly within the photonic bandgap by introducing a defect into the periodic structure. All-organic solid-state lasers with liquid crystal gain media developed so far are mainly based on polymeric liquid-crystals [22][23][24][25][26][27][28], and cholesteric elastomers [29]. Their emission wavelength lies in the visible spectral range, which makes them potentially interesting for biodetection applications.…”

Color‐ and Reflectance‐Tunable Multiple Reflectors Assembled from Three Polymer Films

“…Details of the fabrication process of the PNLC film can be found in ref. [17] except for adding chiral dopants. The PVA film was stacked by spin-coating the aqueous solution onto glass substrates coated with the PNLC or PPFVB films, and rubbed unidirectionally as an alignment layer of the PNLC film [12,18].…”

Defect‐Mode Lasing with Lowered Threshold in a Three‐Layered Hetero‐Cholesteric Liquid‐Crystal Structure

“…The PCLC coatings were cured for 2 min at 180°C, and were then quenched at room temperature to yield well-aligned glassy PCLC films. The details are described in detail by Ohta et al [26]. The helical axis of an approximately 2 lm thick PCLC film was normal to the substrate surface and right-handed.…”