The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A method of achieving integrated microspectrometer with small size, high-energy efficiency, and high spectrum resolution is proposed. This spectrometer utilizes the single-pixilated liquid crystal (LC) and a matched sparse representation algorithm. The properties of compact size and high-energy efficiency are benefit to the configuration of single-pixilated LC which forms a filter array in the time...
We present the fabrication and the characterization of waveguides made of a nematic liquid crystal infiltrated in PDMS channels. The molecular orientation inside the waveguides allows only 0.3 dB variation of light transmission versus polarization.
We report a varifocal lens made of potassium tantalate niobate (KTa1−xNbxO3, KTN) that exhibits a huge second-order EO effect, namely the Kerr effect. The lens consists of a KTN block on which four strip film electrodes are mounted. A voltage applied with these electrodes forms an electric field distribution, modulates the refractive index of the KTN block, and bends light rays. The lens power can...
The elaboration of photonic devices enabling the control of the optical orbital angular momentum at small spatial scales remains a contemporary challenge that needs to be addressed. We will discuss recent progresses and envisioned further developments.
We report on a metamaterial sample that demonstrates double-negative index behavior at the shortest wavelength to date. We also discuss the controlled resonance tuning of optical magnetism in materials by using of liquid crystals.
Trapping and switching of liquid crystal micron-size droplets using a lensed fiber with 1.55 mum cw light is demonstrated. Intensity modulation due to droplet rotation is achieved by controlling the power and polarization of pump light.
We study, both experimentally and theoretically, the dependence of the absorbance and the two-beam coupling diffraction efficiency of dye-doped liquid-crystal films on the angle between the director vector of the liquid-crystal molecules and the polarization direction of the recording beams, which is shifted continuously from parallel to antiparallel corresponding to the director vector of the liquid-crystal...
We have developed a unique polarization converter based on optical rotatory of liquid crystal to generate the radial polarization from the linear. Intense longitudinal electric field near the focus was experimentally observed for the first time by using a two-dimensional optical Kerr shutter camera.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.