Raman spectroscopy as a tool for characterisation of liquid phase devices

This is the author accepted manuscript. The final version is available from the publisher via the DOI in this recordIn this paper, we demonstrate how Raman spectroscopy can be an effective tool for the elucidation of the properties of liquid phase devices, looking at signal enhancement through to beam profiling

Twist-tunable moir\'e optical resonances

Multilayer stacks of twisted optical metasurfaces are considered as a prospective platform for chiral nanophotonic devices. Such structures are primarily used for the realization of circularly polarized light sources, artificial optical rotation, and circular dichroism. At the same time, the behavior of their hybrid photonic modes is strongly affected by the moir\'e-pattern of superimposed periodic constituents. In this work, we show that moir\'e-periodicity in bilayer dielectric photonic crystal slabs leads to an arise of unlimitedly narrow optical resonances, which are very sensitive to the relative twist and gap width between the sublayers. We demonstrate the structure providing twist-tuning of the hybrid mode wavelength in the range of 300--600~nm with quality factor varying from~$10^2$~up~to~$10^5$ correspondingly. The obtained results pave the wave for the utilization of moir\'e-assisted effects in multilayer photonic crystal slabs

Features of the use of topical preparations of framycetin sulfate in the treatment of rhinosinusitis

Introduction. Acute rhinosinusitis is one of the most common infectious diseases in the world. But despite their predominantly viral nature, the activation of their own microflora occurring during the disease, the addition of pathogenic and the associated risks of rhinogenic complications lead to the widespread use of antibacterial therapy for this pathology. Local antiseptics, such as framycetin sulfate in the form of nasal spray, play an important role in the multicomponent structure of rhinosinusitis therapy.The aim of the study was to evaluate the effect of an aerosol preparation of framycetin sulfate of domestic and imported production on the activity of the atrial fibrillation of the nasal cavity as topical antibacterial therapy in acute rhinosinusitis.Materials and methods. The study included 30 adult patients diagnosed with acute rhinosinusitis. The patients were randomized into 2 equal groups and received standard therapy for this disease, according to clinical recommendations. The differences in the groups concerned only topical antibacterial therapy. The 1st experimental group used a drug of domestic production, the 2nd group - a control group, used an imported framycetin spray.Results. Data were obtained not only comparing the clinical picture depending on the treatment, but also information about the effect of the drug on the activity of the atrial epithelium of the nasal cavity, the distribution of the substance in the nasal cavity, and even considered the structural differences of the vials that affect the distribution of the drug during injection. Conclusion. Topical antibacterial therapy with framycetin sulphate is an effective method in complex treatment of acute rhinosinusitis. Innovative technologies for the creation of an aerosol of framicetin solution allow to achieve stable dosage of the drug during use