Near-field polarization conversion in planar chiral nanostructures

Enantiomeric-sensitive optical polarization conversion has been observed in the near-field above a planar chiral nanostructures consisting of an array of gammadions cut in a metal film. Formation of the far-field scattered light rotated with respect to the incident linear polarized light has been visualized

ХИРУРГИЧЕСКОЕ ЛЕЧЕНИЕ РЕЦИДИВИРУЮЩИХ КИСТ БЕЙКЕРА С ПРИМЕНЕНИЕМ ЭНДОСКОПИЧЕСКОЙ ТЕХНИКИ

Purpose of the study - to study the causes of synovitis in patients with recurrent Baker’s cyst, to evaluate the effectiveness of endoscopic treatment of popliteal cysts . Materials and methods. From 2009 till 2013 we observed 34 patients with Baker's cyst. In 18 (52.9%) patients of the main group endoscopic technique was applied, in 16 (47.1%) patients of the comparison group a cystic bag was isolated and dissected with open technique, and then cystic gate was sutured. Results. In 10 (55,6%) patients of the main group the pain disappeared in the first postoperative day (pЦель исследования: изучить причины синовита у пациентов с рецидивирующей кистой Бейкера, оценить эффективность эндоскопического метода лечения кист подколенной области. Материалы и методы. С 2009 по 2013 г. наблюдали 34 пациента с кистами Бейкера, которые были разделены на две группы. У 18 (52,9%) больных основной группы применялась эндоскопическая техника лечения, у 16 (47,1%) пациентов в группе сравнения кистозный мешок выделяли и иссекали открыто, а затем ушивали кистозные ворота. Результаты. У 10 (55,6%) пациентов основной группы в послеоперационном периоде болевой синдром купировался в первые сутки после операции (

Ultrafast Optical Modulation of Second- and Third-Harmonic Generation from Cut-Disk-Based Metasurfaces

We design and fabricate a metasurface composed of gold cut-disk resonators that exhibits a strong coherent nonlinear response. We experimentally demonstrate all-optical modulation of both second- and third-harmonic signals on a subpicosecond time scale. Pump−probe experiments and numerical models show that the observed effects are due to the ultrafast response of the electronic excitations in the metal under external illumination. These effects pave the way for the development of novel active nonlinear metasurfaces with controllable and switchable coherent nonlinear response

Active plasmonics: a new concept for controlling surface plasmon-polariton waves

It is now widely accepted that a new generation of highly integrated photonic devices with structural elements capable of manipulating signals on sub-wavelength scales could be realized with plasmon-polariton waves (coupled optical and electronic excitations) employed as information carriers. However, we will only be able to speak about "plasmonics" in the same way that we speak about "photonics" when efficient techniques for active manipulation of surface plasmon-polariton signals are identified. Here we report on a new concept for active plasmonics, exploiting nanoscale structural transformations in the waveguide material, which is supported by experiments and vigorous numerical analysis. We show that surface plasmon-polariton (SPP) signals in a gold-on-dielectric waveguide containing a gallium section can be effectively controlled by switching the gallium from the crystalline α-Ga phase to a metallic phase in a nanoscale layer adjacent to the interface. For a gallium section only a few microns long, waveguide transmission modulation exceeding 80% can be obtained in the spectral range from 0.8 to 2 micrometres by switching the gallium from the α phase to a metallic phase, We have also demonstrated that the switching may be achieved by an external optical excitation: optical pulses with fluences of only 15 mJ/cm2 are enough to completely switch the waveguides plasmonic properties.<br/

Wavelength dependent birefringence of surface plasmon polaritonic crystals

A periodic array of elliptical nanoholes in a metal film acts as a thin two-dimensional birefringent crystal with wavelength dependent orientation of principal polarization eigenstates, the property which is not encountered in natural crystals. The transmission spectrum of such metallic nanostructures can be controlled in a wide range by selecting the polarization of incident and transmitted light.<br/

NICE review: not nice for patients!

We suggest, numerically model and present initial experimental results on a new concept, based on a nanoscale structural transformation in a plasmon waveguide material, which enables optical, electronic and plasmonic modulation of surface plasmon-polariton signals

Generation of resonant second harmonic in multiple Si/SiO2 quantum wells

Contains fulltext : 91261.pdf (publisher's version ) (Open Access

Controlling optical transmission through magneto-plasmonic crystals with an external magnetic field

Contains fulltext : 72089.pdf (publisher's version ) (Open Access)9 p