Photovoltaic performances of CsPbI2Br solar cells are still lower than those hybrid inorganic-organic perovskite cells, and researchers exploring ways to improve their efficiencies. Due its higher thermal stability in comparison with the generally studied perovskites, all-inorganic has recently attracted great attention. By utilizing combination MnCl2 ZnCl2 particles doping modulate film growth, it is found that infiltrate into holes lattice through growth procedure, leading suppressed...

In this letter, multiband efficient asymmetric transmission is realized both numerically and experimentally in the microwave frequency regime, using a three-layered chiral metasurface (CMS). The proposed structure achieves propagation direction dependent polarization transformation where plane of rotated by 90° for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x/y</i> backward/forward direction. functionality linearly polarized impinging...

Metasurfaces have proven their great application potentials in terahertz (THz) wave modulations. However, realizing an active metasurface retaining lensing functionality the THz frequency regime is still highly desired. Here a metalens, featuring electrically tunable focal length, based on propagation phase delay, proposed and demonstrated experimentally. To full control over designed lens functionality, gold thin film etched with C-shaped aperture antenna array covered by monolayer graphene...

Abstract In this work, a multiband polarization converting metasurface is presented which achieves cross-polarization conversion in five frequency bands while linear-to-circular and circular-to-linear transformation eight bands. The transforming functionality of the structure spread over an ultra-wide range (5–37 GHz) covering most X, C, Ku, K Ka Such extraordinary ultra-wideband operation originates from multiple plasmonic resonances occurring based on two coupled rectangular split-ring...

The first-principles computations show that arsenic-based covalent organic frameworks (As-COF) hold great promise as anode materials for K and Ca ion batteries.

An ideal metasurface design encompasses the control of all degrees freedom electromagnetic (EM) waves. Here, we present a digital coding optimized for dual-band operations (in K and Ka band) orthogonal polarizations. The proposed allows independent simultaneous phases amplitudes cross-polarized transmitted waves in both (±z) direction. We employ to demonstrate distinct functionalities, which include single multiple vortex beams carrying orbital angular momentum (OAM) orders 'l=+1' 'l=−1',...

Metasurfaces have drawn considerable attention in manipulation of electromagnetic waves due to their exotic subwavelength footprints. Regardless immense progress polarization-dependent flat optics, the realization on-device switchable complete phase multiplication is still missing from design multifunctional devices. Here, by combining geometric and propagation phases, a generalized principle proposed that can achieve integer or fractional multiple modulation transmitted circularly...

In the streak tube laser imaging system, there are two conflicts: first is between high spatial resolution and wide field of view (FOV). The second temporal deep depth (DOF). this paper, a new non-scanning system presented. A microlens array with three different apertures used to non-uniformly collect data from image plane so conflict FOV relieved detectable range also increased. remapping fiber optics special design realign on photocathodes tubes realize operation mode DOF relieved....

Metalenses of adjustable power and ultrathin flat zoom lens system have emerged as a promising key photonic device for integrated optics advanced reconfigurable optical systems. Nevertheless, realizing an active metasurface retaining lensing functionality in the visible frequency regime has not been fully explored to design devices. Here, we present focal tunable metalens intensity through control hydrophilic hydrophobic behavior freestanding thermoresponsive hydrogel. The is comprised...

As for spintronic applications, all information is encoded in the spin degree of freedom, so key issues are high spin-polarization, large half-metallic (HM) bandgap, magnetic moment and higher Curie temperature than room temperature. In this paper, we studied halogen based CsYZ2 (Y = V or Cr; Z F, Cl, Br I) full-Heusler alloys. Our study reveals that CsVF2, CsVCl2, CsVI2 CsCrI2 alloys HM ferromagnets while remaining exhibits semiconductor behavior. The electronic structures indicate these...

Abstract A subclass of two-dimensional materials with honeycomb structure, namely buckled Xene monolayers, are efficient for topological applications due to varying degrees buckling in their lattice structure and have received a significant revival interest the last few years. However, to-date, less attention, as compared to, planer bilayers has been assigned bilayers. The can offer unique platform study transport properties bilayer systems. In this study, we explore unknown behaviour by...

Noncritical phase-matching (NCPM) fourth harmonic generation (FHG) of a 1053 nm laser was realized at room temperature on an ammonium dihydrogen phosphate (ADP), 35% deuterated DADP and 62% potassium (DKDP) crystals grown by point-seed rapid growth method. The NCPM is 33.7°C for ADP, 32.1°C DADP, 31°C DKDP crystal. temperature, angle tuning properties, performance in FHG ADP are calculated compared detail. 2ω-to-4ω conversion efficiency has been demonstrated up to 67% with crystal, 63.45%...

Metasurfaces, two-dimensional (2D) or quasi-2D arrays of dielectric metallic meta-atoms, offer a compact and novel platform to manipulate the amplitude, phase, polarization incoming wavefronts in desired manner by engineering geometry meta-atoms. In control, spin-insensitive metasurfaces have attracted significant attention due robustness circular against beam misalignment multi-path effects. Till now, several efforts been made realize polarization-insensitive for circularly polarized (CP)...

Metamaterials have shown great promise for manipulating electromagnetic (EM) waves, thus opening new routes the progression of flat optics. However, postfabrication fixed structures hinder dynamic manipulation light. Dynamic control EM light has been realized through different mechanisms including electrical gating, optical pumping, mechanical actuation, and temperature stimulation. Here, we are first proposing plasmonic-resonators-mounted thermoresponsive free-standing hydrogel holographic...

We propose and numerically demonstrate a dynamic beam deflector based on plasmonic resonator loaded thermoresponsive freestanding hydrogel that swells collapses in water by temperature. For this purpose, we utilize four-step phase gradients mounted hydrated hydrogel. normal incidence, linearly orthogonal light deflects to 19.44° the collapsed state 14.40° swollen of Furthermore, at third angle 12.29° when solvent changes from ethanol. It is expected our metadesign will provide platform for...

A significant issue in developing metal-catalyzed plastic polymer materials is obtaining distinctive catalytic characteristics to compete with current plastics industrial commodities. We performed first-principle DFT calculations on the key insertion steps for industrially important monomers, vinyl fluoride (VF) and 3,3,3-trifluoropropene (TFP), explain how ligand substitution patterns affect complex's polymerization behaviors. Our results indicate that favorable 2,1-insertion of TFP caused...