Optical properties of the dual circularly polarized lights reflected from ITO films under electric and thermal fields.

Indium tin oxide (ITO) is widely used in optoelectronic devices due to its excellent optical and electrical properties. The real-time characterization of the ITO surface under electric and thermal fields plays an important role in determining its performance. The Goos-Hänchen (GH) and Imbert-Fedorov (IF) shifts and polarization properties of the dual circularly polarized lights reflected from ITO films can be used to describe its features. The dual circularly polarized lights, right circularly polarized (RCP, S 3≈+1) and left circularly polarized (LCP, S 3≈-1) lights, are obtained by rotating the linear polarizer and quarter-wave plate. The polarization properties and the lateral shifts of the RCP and LCP lights were studied by a polarimeter and a slim beam profiler. The results show that the polarization properties of the dual circularly polarized lights are mainly affected by temperature. The degree of the polarization properties of the RCP and LCP lights changed from 97.85% to 97.40%, and from 98.40 % to 83.50%, respectively. The reflectivity of the RCP and LCP lights changed from 42.19% to 40.37%, and from 43.80% to 0.80%, respectively. The GH and IF shifts of the RCP light are 156.50 µm and186.00 µm, respectively. The GH and IF shifts of the LCP light are 233.00 µm and 257.00 µm, respectively. The ITO film has more effect on the LCP light than that of the RCP light due to its strong ITO film (400) plane.

Optical properties of silica microspheres with different functional groups.

Silica microspheres with different functional groups can be used as diagnostic material. Here, differently functionalized group (NH2-, COOH-, SiOH-, and epoxy-) silica microspheres of approximately 5 µm in diameter are prepared on garnet substrates by a self-assembly method. The surface morphologies of the silica microspheres are observed by an optical microscope. The pressure generated from the glass/silica microsphere/graphite interface is measured by a resistance strain sensor as a function of an external direct current (DC) voltage. A PAX5710 IR3 polarimeter and slit beam profiler give information on the optical polarization and optical spot distance of the polarized laser beams reflected from the differently functionalized group silica microspheres. The results reveal that the relationships between the optical polarization properties, the optical spot position of the polarized laser beam, the reflectivity of the differently functionalized group silica microspheres using circularly polarized and linearly polarized laser beams, and the external pressure show different trends. The optical properties of the differently functionalized group silica microspheres are consistent with the experimental data pressure.

Polarization properties of garnet and groove films on garnet in the transmission and reflection modes.

Stokes polarimeters are most commonly used to measure the state of polarization of optical wave. Dependence of Stokes parameters, degree of polarization on external magnetic field are presented for garnet and groove films on garnet in the transmission and reflection modes. The Stokes parameters S1, S2, S3 of different modes show different tendency and asymmetrically change when the external magnetic field change, while the degree of polarization basically unchange.

Faraday Effect sensor redressed by Nd2Fe14B biasing magnetic film.

A Faraday Effect sensor with Nd(2)Fe(14)B biasing magnetic film was described. Ta/Nd(2)Fe(14)B/Ta films were grown by magnetron sputtering method. The magnetic domain in the sensor with the Nd(2)Fe(14)B biasing magnetic film can persist its distribution. The average linearity error of Faraday Effect sensor with biasing magnetic film decreased from 1.42% to 0.125% compared with non-biasing magnetic film, and the measurement range increased from 820 Oe to 900 Oe.