The phenomenon of chirality, common in nature, pertains also to food components. The effect of the chiral structure of chemical compounds is the occurrence of optical isomers, i.e. enantiomers. The only source of optically active substances are living organisms, which produce most frequently mostly one of isomers. Proteins and carbohydrates are chiral: amino acids are found in proteins only in ...

The influence of applied electric fields on the pretransitional optical activity Ii) in the chiral nematic 4-cyano-4-(2-methyl)butylphenyl (CB15) was investigated. A rotating analyzer system was used to measure the optical activity and fields

The focal purpose of this thesis is to study chirality specifically in telecommunications area, through the pure chiral fibres (optical fibres constituted by chiral material) and chiral fibre grating (twisted optical fibre), analysing also its behaviour and applications. Nevertheless we shall also address this theme from an economical perspective. The study begins by giving a brief introduction...

Conventional three-dimensionally (3D) chiral media can exhibit optical activity for transmitted waves, but optical activity for reflected waves is negligible. This work shows that mirror asymmetry of the experimental arrangement extrinsic 3D chirality leads to giant optical activity for reflected waves with fundamentally different characteristics. It is demonstrated experimentally that extrinsi...

Artificial nanostructures enable fine control of electromagnetic fields at the nanoscale, a possibility that has recently been extended to interaction between polarised light and chiral matter. The theoretical description such interactions, its application design optimised structures for chiroptical spectroscopies, brings new challenges common set tools used in nano-optics. In particular, effec...

DNA single strands can be applied as templates for the self-assembly of Py≡dU chromophores in H2O with optical properties that are very similar to Py≡dU stacks that are covalently attached to DNA. The chirality, however, of the non-covalent stacks is opposite to that of the covalent stacks.

Analytical forms of the optical helicity and chirality monochromatic Laguerre-Gaussian vortex beams are derived up to second order in paraxial parameter $kw_0$. We show that input linearly polarised vortices which possess no chirality, or spin densities can acquire them at focal plane for values a beam waist $w_0 \approx \lambda$ via an OAM-SAM conversion is manifest through longitudinal (with ...