Photonic crystals are periodic optical structures that can control the flow of light. Multiple reflections from surfaces separated by a distance similar to the wavelength prevent an optical beam ...

A US district court has said that a key patent held by Astellas on its Myrbetriq drug for urinary incontinence is invalid, in a setback to its efforts to defend the blockbuster th ...

Chiral liquid crystals form a number of modulated structures with unusual properties. Here we report experimental studies of the two-dimensional structure forming near the cholesteric-isotropic phase ...