We propose a double-layered gold film structured with U-shaped aperture in chiral configuration to manipulate the polarization of transmitted light. Two U-shaped aperture arrays are fabricated on both gold films separ...
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We propose a double-layered gold film structured with U-shaped aperture in chiral configuration to manipulate the polarization of transmitted light. Two U-shaped aperture arrays are fabricated on both gold films separated by a spacing film, where each face-to-face pair of apertures is arranged perpendicularly to each other in counterclockwise or clockwise. Due to the coupling of the pairs, surface plasmon polariton resonances in the double-layered films in phase and out of phase at two frequencies, respectively. The polarization of transmitted light is rotated 90 degrees by switching the chiral configuration of the doubled-layered gold film between counterclockwise and clockwise. The double-layered gold film structured with apertures tailors the polarization state of the transmitted light at their resonance peaks relative to their complementary structures. These results provide us an effective way to realize an extraordinary transmission and manipulate the polarization state of a double-layered films in chiral configuration. (C) 2014 AIP Publishing LLC.
Twist-1 protein (also called Twist) has been suggested to be involved in tumor epithelial-mesenchymal transition (EMT) related progression, however, the mechanism by which Twist promotes lymph node metastasis is not f...
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Twist-1 protein (also called Twist) has been suggested to be involved in tumor epithelial-mesenchymal transition (EMT) related progression, however, the mechanism by which Twist promotes lymph node metastasis is not fully understood. In the present study, we found that nuclear Twist expression is clearly correlated with lymph node (LN) metastasis as determined by immunohistochemistry (IHC). A highly invasive EC109 cell subline, EC109-P, was established by repeated in vitro transwell isolations for the cell model. Immunofluorescence (IF) assay demonstrated that nuclear Twist expression was markedly higher in the highly invasive EC109-P cell line when compared with EC109 and EC9706 cells. Based on our cell model, the function and mechanism by which Twist regulates LN metastasis in ESCC was investigated. The results showed that the overexpression of Twist could significantly increase the invasion and VEGF-C expression of EC9706 cells, whereas the knockdown of Twist expression results in the opposite effects. This finding was further strengthened by the results of the analysis of co-expression of Twist and VEGF-C by IHC in ESCC clinical samples. In summary, our study indicates that nuclear Twist plays an important role in ESCC lymphatic metastasis by increasing the expression of VEGF-C. The combination of Twist and VEGF-C detection could be a reliable prediction of LN metastasis in ESCC.
In this work, we investigate the transmission of light through an isolated subwavelength hole, the hole chain and the hole array with different geometries, respectively. It is shown that that when the light illuminate...
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In this work, we investigate the transmission of light through an isolated subwavelength hole, the hole chain and the hole array with different geometries, respectively. It is shown that that when the light illuminates an isolated subwavelength hole, localized surface plasmons (LSPs) are excited and contribute to transmission of the hole;while the light illuminates the hole chain and array, both LSPs and propagating surface plasmons (PSPs) are excited, and their contributions to the transmission of holes strongly depend on the geometry of the hole chain and array, and also on the polarization of incident light. The theoretical calculations are based on three-dimensional full-vector finite-difference time-domain method. The investigations may have potential applications on designing plasmonic structures and devices.
We present theoretically microwave filters and phase shifters based on the propagation of hybrid electromagnetic-spin waves in a ferromagnetic/dielectric multilayer waveguide. It is demonstrated that some propagating ...
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We present theoretically microwave filters and phase shifters based on the propagation of hybrid electromagnetic-spin waves in a ferromagnetic/dielectric multilayer waveguide. It is demonstrated that some propagating modes of microwave appear in the waveguide and the number of the modes increases with increasing the number of the building blocks. Those propagating modes originate from the coupling between microwave and spin wave, associated with the collective excitations of spin motions in the whole multilayer system when the layer thickness is relatively thin. In addition, it is shown that the attenuation of microwaves and phase difference in the waveguide are tuned by the magnetic field, the ferromagnetic resonance line width, and the conductivity of ferromagnetic material. The investigations can be used in designing tunable compact bandpass filters and phase shifters of microwave. (C) 2010 The Japan Society of Applied Physics
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