Noise is generally thought as detrimental for energy transport in coupled oscillator networks. However, it has been shown that certain coherently evolving systems, the presence of noise can enhance, somehow unexpectedly, their efficiency; a phenomenon called environment-assisted quantum (ENAQT) or dephasing-assisted transport. Here, we report on experimental observation such effect network electrical oscillators. We demonstrate by introducing stochastic fluctuations one couplings network,...

By considering the structure of holococcoliths (calcite plates that cover holococcolithophores, a haploid phase coccolithophore life cycle) as photonic structure, we apply discrete dipolar approximation to study light backscattering properties these algae. We show some holococcolith structures have ability scatter ultraviolet radiation. This property may represent an advantage for holococcolithophores possessing it, by allowing them live higher in water column than other coccolithophores.

Flight velocity measurement is an important aspect of insect research that can aid identification and facilitate studies monitoring movements. We propose a novel scheme for the 1-D flight insects, based on near-IR Scheimpflug lidar system. implement this new technique apply it to study insects at Salter Research Farm, Robertson County, Texas. The resolution property perpendicular probing direction system explored reveals capability retrieving component normal passing through field view our...

Abstract The size of the nanoparticles (NP) is one most important and essential characteristics to know properties synthesized nanostructures. common characterization procedures are related Scanning Electronic Microscopy (SEM), Transmission (TEM), Atomic Force (AFM). Unfortunately, from a practical point view, they represent time-consuming procedure require expensive equipment, which limits its application specialized research groups. Significant attention has been paid Dynamic Light...

Abstrct Passive parity-time symmetry breaking transitions, where long-lived eigenmodes emerge in a locally dissipative system, have been extensively studied recent years. Conventional wisdom says that they occur at exceptional points. Here we report the observation of multiple transitions showing emergence slowly decaying dissipative, Floquet electronic system with synthetic components. Remarkably, our modes without Our setup uses an electrical oscillator inductively coupled to oscillator,...

The use of LiF as a thin interlayer between the electron transport layer and cathode has played pivotal role in remarkable advances perovskite LEDs (PeLEDs); however, mechanism behind effect remains to be fully understood. Here, we report combined experimental computational study, from which ascribe benefits migration dissociated Li into F anode. Electronic device simulations reveal that former improves injection by lowering Schottky barrier height, while latter reduces width. These reduce...

In this collaborative study, the variables that affect morphology of nanotubular arrays titanium oxide (grown by anodization substrate) were analyzed a fractional factorial (Taguchi) statistical experimental design. The growth voltage and water content medium found to have maximal impact on nanotube length as shown an analysis variance. Nanotubular array was monitored electrochemical impedance spectroscopy (EIS) results corroborated other measurement probes (scanning electron microscopy,...

Time-resolved photoluminescence spectroscopy is used to compare decay dynamics of colloidal PbSe quantum dots as (i) dilute dispersions in hexanes, (ii) thick, dense, emulsive films, and (iii) sub-monolayer films on silicon surfaces. Accounting for the effect each dielectric environment exciton radiative rates, we deduce non-radiative rate excitons increases going from solution thick by ≈6 fold ≈7–16 fold. This attributed surface passivation degradation due a lack mobile ligands when...

We report on the experimental observation of an emerging negative resistance in a system coupled linear electronic RLC harmonic oscillators under influence multiplicative noise with long correlation time. When two are by noisy inductor, analysis Fourier space electrical variables unveils presence effective resistance, which acts as energy transport facilitator. This might constitute simple explanation now fashionable problem assisted classical systems. The setup is based working principle...

We have performed a detailed measurement of the sign nonlinear refractive index PTS-polydiacetylene using Michelson interferometry and z-scan at 1.06 μm wavelength. The was 60 ps laser pulses 10 Hz repetition rate that avoided any significant thermal contribution. n2 found to be negative. negative explained considering saturation exciton absorption for off-resonant pumping. far outweighs two photon resonances in determining magnitude domain within wavelength range 700–1064 nm.

Abstract This paper shows the in‐situ study of wetting process in Silicon during anodization using an electrochemical Differential photoacoustic Cell (DPC). The Photoacoustic amplitude and phase signals were obtained for samples air, ethanol, ethanol/HF finally air. According to these results ethanol is responsible a mechanical contact reducing superficial tension produce removing SiO x 2 species on surface. It was found that DPC powerful technique wet surface before formation porous silicon...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> An electrostatic model is presented to explain the closed packing observed in anodic production of nanotubes. The suggested by experimental results impedance spectroscopy performed during growth titanium oxide nanotubes a polar nonaqueous electrolyte. dynamics process represented with capacitance and dc current. Accordingly, combination chemical activity defines structure formation, ranging from...

Single crystal films of N–(4-nitrophenyl)-L–prolinol have been prepared by modified shear method and the second order optical susceptibility has measured harmonic generation. The small thickness high nonlinear coefficient allowed measurements without considering phase matching. magnitudes tensor elements were determined detailed polarization selective measurements. maximum effective value nonlinearity, dmaxeff was found to be approximately 18 times deff LiNbO3. d21 is equal 97 (±5) pm/V d22...

Conformal mapping of a slab two-dimensional ultrasonic crystal generate closed geometrical arrangement scatterers with appealing acoustic properties. This shell is able to confine modes. Some these internal resonances can be induced from an external wave source. The linear defect produces wave-guide that exhibits spatial-frequency selection analogous characteristic synthetic "cochlea". Both, experimental and theoretical results are reported here.

In this article, we describe a magnonic crystal formed by magnetite nanoparticles. The periodic strip-like structure of the nanoparticles was fabricated on surface thin yttrium iron garnet single-crystal film grown gallium–gadolinium substrate via dip-coating techniques. It shown that such induces formation bandgaps in transmission spectra magnetostatic spin-waves (MSSW). simulated transfer matrix method. Spin-wave detection has been carried out using pair microwave antennas and vector...

Operation of Cr:LiSAF laser pumped by 670 nm high brightness single stripe (width 50 μm) diode with pump-threshold as low 650 μw is reported. The lasing threshold was observed simultaneously operation diode. For short pulse generation we designed and tested different multiple quantum well saturable absorbers. continuous mode-locked achieved tunability from 846 to 875 nm.

In this article, we show an alternative low-cost fabrication method to obtain poly(dimethyl siloxane) (PDMS) microfluidic devices. The proposed allows the inscription of micron resolution channels on polystyrene (PS) surfaces, used as a mold for wanted microchip’s production, by applying high absorption coating film PS surface ablate it with focused low-power visible laser. obtaining micro-resolution at powers between 2 and 10 mW can realize any two-dimensional polymeric effect main...

ABSTRACT Relaxation dynamics is universal in science and engineering; its study serves to parameterize a system's response help identify microscopic model of the processes involved. When measured data for phenomenon cannot be fitted using one exponential, choice an alternative function describe decay becomes nontrivial. Here, we contrast two different, but fundamentally related approaches fitting nontrivial curves; exponential decomposition gamma probability density function. Copyright ©...