Krishnaswamy, SrimathiGunasekar, SoorajGhosh, PritamRagupathi, Veena...
8页查看更多>>摘要：In this paper, epoxy resin was prepared with graphitic carbon nitride (GCN) via the casting method. Different concentrations of GCN (0.5%, 1%, and 1.5%) were added in the epoxy matrix and studied the effect of filler on the optical properties of the composite. A lower optical bandgap of 2.53 eV harnessing UV and visible light was obtained for 1.5% GCN in an epoxy matrix. Higher optical conductivity was obtained for a higher concentration of GCN in epoxy resin. The structural property and thermal property have been discussed in detail. The room temperature photoluminescence studies indicated enhanced luminescence for a higher concentration of GCN in epoxy resin. The high concentration of GCN creates more traps for electrons hence delayed radiative emission is observed. As this composite possesses excellent optical properties, it could be employed in flat panel displays, LED, optical fibers, and base solar cell plates.
原文链接:
NSTL
Elsevier
Sharif, Morteza A.Hadi, KoushaBorjkhani, Mehdi
6页查看更多>>摘要：We deal with a non-radiative approach to investigate the propagation of Surface Plasmon Polaritons (SPPs) in an Au nanodisk array in touch with an analyte medium. We obtain a nonlinear equation with solutions as in the form of kinky breather and periodic lump. The nonlinear response depends on the dielectric constant and wavenumber variation in analyte zone. It is shown that the periodic feature can guarantee the enhanced propagation length of SPPs stationary modes. Analytical results also reveal the occurrence of Fano resonance while numerical results show that the propagation length can go beyond 56 mu m. On the other hand, using Kretschmann-Raether approach, we reach the Fano resonance in consequence of the interaction of dark and bright plasmon modes which is in agreement with our model and interpretation. Our nonlinear model can give a sketch for SPPs propagation especially in bio-sensing application.
原文链接:- NSTL
- Elsevier
Shkir, Mohd.Bouzidi, M.Mohamed, MansourKumar, Manish...
9页查看更多>>摘要：Pure CdO nanostructured thin films and Ag doped with 1.0, 2.0 and 4.0 wt% doping concentrations were fabricated successfully on glass substrates with a cost-effective spin coating technique. The prepared films exhibit a cubic crystal structure oriented along (111) plane. The surface morphology of the pure CdO films shows a cauliflower shape structure, becomes granular, and compact at high Ag doping concentration. Raman spectra of the films reveal LO (longitudinal optical) and TO (transverse optical) vibration modes at 406.80 cm(-1) and 566.54 cm(-1). The absorption of the films significantly varies with Ag doping concentrations and as a result, the electronic structure of the films is tailored. Moreover, the optical band gaps vary in the range of 1.42-1.70 eV. In addition, the optical parameters n, k were studied in correlation with Ag doping concentrations. The obtained room temperature photoluminescence spectra of the prepared films show a broad peak at ~350 nm. The third order nonlinear optical parameters of the films were also examined systematically.
原文链接:- NSTL
- Elsevier
Essiane, Salome NdjakomoEssama, Bedel Giscard OnanaShabat, Mohammed M.Atangana, Jacques...
19页查看更多>>摘要：We examine the cubic-quintic-Raman influences on the system when the second-order dispersion and the cubic-quintic-nonlinearities act in a double-negative material. This research is done for both absorption and negative index regimes. Using the collective coordinates' technique, the quintic-nonlinearity induces the generation of Kuznetsov-Ma breathers and Peregrine soliton. Thereafter, the cubic-Raman effect comes into play and breeds the chaotic Peregrine waves' field, the complex rogue event, and the modified complex rogue event. Therefore, the quintic-Raman effect induces first-, second-, and third-forms of the dissipative rogue waves and the twin parallel wave trains. Some fascinating phenomena such as deletion of waves, damping effect, tree structure, and disintegration of the Raman soliton self-frequency shift leading to the multi-Raman soliton self-frequency shifts, are also scrutinized. Further, internal strife leading to these above-mentioned effects, are likewise presented in detail.
原文链接:- NSTL
- Elsevier
Elabsy, A. M.Elkenany, Elkenany B.
5页查看更多>>摘要：We investigate the effect of nonparabolicity of the GaAs conduction band on the resonant lifetime and the associated lowest resonant energy for electrons tunneling through undoped symmetric GaAs/AlxGa1-xAs double barrier nanostructures. The effective mass theory is considered by employing the spatial and energy dependence of the effective masses for both well and barrier materials of the structure. It is found that, both resonant lifetime and the corresponding resonant energy are mainly affected by nonparabolicity, mass mismatch, and the aluminum content that controls the barrier height. The results of the present work showed a strong dependence of the resonant lifetime and the resonant energy on the barrier thickness and well width. Pronounced discrepancies are obtained between the results of the present work and other works which neglected the effects of the nonparabolicity and the mass mismatch. A good agreement is obtained in comparing the results of the present work with the experiment data.
原文链接:- NSTL
- Elsevier
Hu, LifangGao, WeiXiao, MingLi, Zihao...
12页查看更多>>摘要：In the study, TiO2 based resistive random access memory (RRAM) was fabricated by sol-gel technique. By changing the thickness of the TiO2 layer, the devices showed a transition of bipolar digital-type to analog-type memristive behavior under cyclic voltage sweeping process, along with well-defined high and low resistance states. The creation and rupture of nanoscale conductive filaments by drift of the oxygen vacancies was responsible for the digital behavior. The digital-type conduction mechanisms were explained as trap-controlled space charge-limited current conduction mechanism at high resistance state and Ohmic conduction mechanism at low resistance state, respectively. Schottky barrier change induced by the formation of the interfacial layer between Al and TiO2 was responsible for the analog behavior. The analog-type switching mechanisms were explained as trapping and de-trapping of carriers. The interfacial microstructure between TiO2 and electrode would affect the resistive switching behavior of the devices remarkably.
原文链接:- NSTL
- Elsevier
Zhou, YangWang, Zhi-WeiWan, Bao-FeiZhang, Hai-Feng...
14页查看更多>>摘要：A new novel of scatterers which is in the form of a multi-ring shape is proposed in this paper. The circular scatterers in the two-dimensional (2D) photonic crystals (PCs) have been replaced by the multi-ring ones based on the honeycomb and Kagome lattices, and the effects of the number of layers (N), the refractive index (n), and the ring width (W) for the multi-ring scatterers on the photonic band gaps (PBGs) are also researched. After that, the relative properties of the absolute PBGs and all-angle negative refraction (AANR) phenomenon in two different types of inserted scatterers have been probed into. The band structure diagrams of those two lattices and equifrequency contours (EFCs) for two different inserted scatterers are acquired through the plane wave expansion (PWE) method. Through comparison, it is qualified for being figured out that, if the scatterer structure is varied from circular rode to multi-ring one, the bandwidths of some absolute PBGs can be expanded or the number of absolute PBGs can be added. Then, through the diagrams of EFCs and the band structures, the phenomenon that the AANR range shrank after the change has been discovered, and verify it by calculation.
原文链接:- NSTL
- Elsevier
Lopez-Gutierrez, B. N.Herrera-Gonzalez, A. M.Aranda-Espinoza, S.Aleman-Ayala, K....
7页查看更多>>摘要：The magnetic and fluorescence properties were studied for a polymer nanocomposite (PNC) based on strontium hexaferrite (Sr-M) nanoparticles embedded in a polyvinyl alcohol (PV-OH) matrix. This study reveals the effect of nanoparticles operating on the structural behavior and the functional properties of the polymer nanocomposite. The X-ray diffraction and the Rietveld method showed a change of the PV-OH semi crystallinity as the number of nanoparticles varies in the composite. This behavior has been related to the close interactions between the nanoparticles and the polymer which show to be capable of modifying the structural and functional properties of the matrix. Here, the nanoparticles promote a fluorescence quenching as the nanoparticles increase. Then, a close relationship between the polymer structure and its functional properties is discernible. Also, the number of nanoparticles and their arrangement in the PNCs promote the emergence of magnetic interactions which change the micromagnetic properties of the system.
原文链接:- NSTL
- Elsevier
