Splitting light beam by meanderline with continuous phase profile

It has been successfully demonstrated can be widely used in nano-photonics applications owing to their flexible wavefront manipulation in a limited physical profile.However,how to improve the efficiency for the transmission light is still a challenge.We experimentally demonstrate that the sine-shaped metallic meanderline fabricated by focus ion beam technology converts circularly polarized(CP)light to its opposite handedness and sends them into different propagation directions depending on the polarization states in near-infrared and visible frequency regions.The beam splitting behavior is well characterized by a simple geometry relation,following the rule concluded from other works on the wavefront manipulation of metasurface with phase discontinuity.Importantly,the meanderline is demonstrated to be more efficient in realizing the same functions due to the suppressed high order diffractions resulted from the absence of interruption in phase profile.The theoretical efficiency reaches 67%.Particularly,potential improvements are feasible by changing or optimizing shape of the meanderline,offering high flexibility in applications for optical imaging,communications and other phase-relative techniques.Additionally,since the continuous phase provided by the meanderline can improve the sampling efficiency of the phase function,it is helpful in realizing high quality hologram.

Laser-induced Voltage in La_(0.85)Sr_(0.015)MnO_3/Fe Heterostructure

The La0.85Sr0.015MnO3/Fe heterostructure deposited on Si （100） substrate was prepared by the magnetron sputtering. The laser-induced voltage in the sample and the difference in the voltage signals between the current-in-plane geometry and current-perpendicular-to-plane geometry at 77 K were investigated. This difference can be attributed to the different transport mechanisms.

Lattice Effect on the Transport Properties in Double Doped La_(2/3)(Ca_(1-x)Sr_x)_(1/3)MnO_3 Films

The transport properties in the La2/3（Ca（1-x）Sr（x））1/3MnO3 （x=0.1/3, 2/3） films prepared using the RF magnetron sputtering method were investigated, The effect of the Ca, Sr double-doping at the A position in the La（2/3）A（1/3）MnO3 on the structure of the targets and transport of the films has been studied. With the increase of x, the structures of the targets transform from the rhombohedral phase to the cubic phase; the metal-insulator phase transition temperature （Tp） of the films increases; and the corresponding peak resistivity decreases. All the phenomena can be qualitatively explained by the lattice effect.

Prevention and Management of Soil Secondary Salinization in Paddy Field Irrigation Area

By analyzing the process of soil salt accumulation in irrigation area, and discussing the change of irrigation and drainage methods for drought transformed into water, the control scheme of soil secondary salinization in Wujiazi Irrigation Area was analyzed concretely, and the experience was summarized. After in-depth discussion, the importance of irrigation and drainage methods in the prevention and control of soil secondary salinization in irrigation areas was analyzed.