Graphene is a promising material for producing optical devices because of its optical, electronic, thermal, and mechanical properties. Here, we demonstrated on-chip switches equipped with graphene heater, which exhibited high modulation speed efficiency. We designed the optimal structure switch an add/drop-type racetrack resonator two output waveguides (the through drop ports) by electromagnetic field calculation. fabricated in microheater was directly placed on observed operation utilizing...

For the single crystals of thalidomide (C13H10N2O4, TD) grown by solvent evaporation method, temperature dependences crystal structures have been investigated over a wide range between 100 and 423.15 K. Comparing α-form racemic TD crystal, which consists symmetric heterochiral dimers belongs to P21/n space group, with enantiomeric P21 asymmetric (pseudosymmetric) homochiral dimers, there clear differences in temperature-dependent changes lattice parameters, isobaric linear thermal expansion...

A metastable liquid crystal (LC) was found to serve as a time-responsive reaction medium, in which the enantioselectivity of photoreaction perfectly switched through isothermal annealing system. When LC salt an enantiopure amine with photoreactive acid irradiated UV/vis light, situ photodimerization moiety proceeded smoothly afford (+)-isomer photodimer high (+86% ee). In contrast, photoirradiation aged sample, isothermally annealed for 20 h, gave predominantly (-)-isomer (-94% Systematic...

This paper presents a technique by which the steady-state performance of grid-connected permanent-magnet induction generator (PMIG) can be predicted more accurately. By applying topological principle duality, an equivalent circuit PMIG is derived that takes into consideration core loss as well (PM) excitation. The nonlinear parameters in are modeled using curve-fitting methods. Experimental results performed on 2.2-kW prototype demonstrate accuracy proposed technique.

Optical activity (OA) along the optic axis of crystalline benzil has been measured by many over past 150 years. However, OA anisotropy remains uncharacterized due to difficulties in sample preparation as well competition with linear birefringence (LB). The challenges associated measuring low-symmetry directions crystals have too often left scientists only average values nonresonant solution, i.e., specific rotations, which continue resist interpretation terms structure. Measuring facilitated...

Abstract Many single crystals have been developed and commercialized for optical isolators. However, isolator materials limited to isotropic or the direction (optic axis) of anisotropic crystals. This study investigates wavelength dependences linear birefringence, dichroism, Faraday rotation magnetic-circular dichroism in a crystal rare-earth fluoride, namely CeF 3 . Measurements were made parallel perpendicular optic axis under an applied magnetic field. The field was generated by Nd-Fe-B...

IR analyses such as Fourier transform infrared spectroscopy (FTIR) are widely used in many fields; however, the performance of FTIR is limited by slow speed (∼10 Hz), large footprint (∼ millimeter), and glass bulb structure light sources. Herein, we present imaging based on multilayer-graphene microemitters, which have distinct features: a planar structure, bright intensity, small (sub-μm2), high modulation >50 kHz. We developed an analysis system microemitter performed absorption...

A new biological nutrient removal process, anaerobic-oxic-anoxic (A/O/A) system using denitrifying polyphosphate-accumulating organisms (DNPAOs), was proposed. To attain excess sludge reduction and phosphorus recovery, the A/O/A equipped with ozonation tank adsorption column operated for 92 days, water quality of effluent, efficiency, recovery efficiency were evaluated. As a result, TOC, T-N T-P 85%, 70% respectively, throughout operating period. These slightly lower efficiencies than...

New holographic prescription for the model of 3d higher-spin gravity coupled to real matter fields $B_{\mu\nu}$ and $C$, which was introduced in ArXiv:1304.7941[hep-th], is formulated. By using a local symmetry, two components are eliminated, gauge-fixing conditions imposed such that non-vanishing component, $B_{\phi\rho}$, satisfies covariantly-constancy condition background Chern-Simons gauge $A_{\mu}$, $\bar{A}_{\mu}$. In this model, solutions classical equations motion $A_{\mu}$...

Microsized light sources with polarized or broadband emission can be used for a variety of applications. However, the system directly generating and broad-spectrum without using polarizers has not been established. Here, we found that nano-device densely packed highly aligned carbon nanotube (CNT) films on silicon chips emit broad spectrum. We observed spatial patterns are dependent angle between electrical bias CNT alignment direction, which caused only by large thermal conductivity...

A novel method for fabricating anisotropic collagen membranes, which regulate the preferred orientation, is developed. The high-accuracy universal polarimeter (HAUP) used simultaneous and quantitative evaluations of optical anisotropy activity. evaluation these quantities, enabled by HAUP method, beneficial to field tissue engineering.

We report the development of narrow-linewidth photoluminescence (PL) devices based on single-walled carbon nanotubes (SWNTs) and silicon photonics with microresonators waveguides that can generate in-line PL at a telecommunication wavelength 1.55 μm band. coupled from SWNTs to ring disk resonators obtain low-background PL. From resonator device, emission high Q factor ∼3000 is obtained. In addition, enhanced by approximately 34 due confinement excitation light in resonator. The saturable...

Graphene is a promising material for developing high-speed and wide-wavelength-range photodetectors. However, since the polarities of photovoltages at each graphene/electrode interface two electrodes on both ends graphene are opposite, they canceled out under macroscopic light irradiation to In this study, we propose graphene-based photodetectors with different asymmetric device structures that can suppress cancelation photovoltage interfaces electrodes. One has local shadow mask, where only...

A single-photon source (SPS) based on a single-walled carbon nanotube (SWCNT) is promising candidate for uncooled on-chip quantum information optoelectronics because single photon can be generated at both room temperature and telecommunication wavelengths silicon chips. However, the applications of information, such as computing cryptography, higher performance SPSs that exhibit high purity efficiency generation are required. Here, we theoretically propose high-performance simultaneously...

High-speed light emitters integrated on silicon chips can enable novel architectures for silicon-based optoelectronics, such as on-chip optical interconnects and photonics. However, conventional sources based compound semiconductors face major challenges their integration with the platforms because of difficulty direct growth a substrate. Here, we report high-speed, ultra-small-size electroluminescence (EL) semiconducting single-walled carbon nanotube (SWNT) thin films. The peaks EL emission...

We have examined optical properties of a fluorene derivative with two positively charged substituents, 1,1’- diethyl-4,4’-(9,9-diethyl-2,7-fluorenediyl-2,1-ethanediyl)dipyridinium perchlorate (1), in water. The photoluminescence quantum yield 1 was relatively high (35%) for use as fluorescent probe also two-photon absorption (TPA) methanol. maximum value the TPA cross-section (730 GM at 750 nm, = 10-50 cm4 s photon-1 molecule-1) larger than that most two-photon-excited dyes including...

Two-photon absorption (TPA) spectra were measured on a dimethyl sulfoxide solution of [M(dpphen)3](ClO4)2 (dpphen: 4,7-diphenyl-1,10-phenanthroline; M = Mn, Co, Ni, Cu, Zn, and Ru). The TPA cross section depended drastically the central metal(II) ions, in order Ru- Co- > Ni- Mn- Cu- Zn complexes. effects rationalized terms resonance photons used for two-photon transition with one-photon band.

We developed a procedure for direct patterning of graphene with arbitrary position, size, and shape on silicon substrates from solid-state carbon source without dry etching processing. Our light emitting devices perform par those based high crystallinity obtained via mechanical exfoliation or chemical vapor deposition.

This paper focuses on anomalous nonlinear phenomena in a thyristor controlled reactor-static var compensator (TCR-SVC) system, called switching time bifurcation, and clarifies the relationship between occurrence of phenomenon intrinsic characteristics circuit equation with function. The TCR-SVC system cannot be predicted when dynamics related to action is neglected. Therefore, this considers operations analysis phenomena. parametric excitation discussed relation homogeneous expression...

Forty-eight patients with hepatic malignancy (47 hepatocellular carcinoma, one metastatic colon carcinoma), who underwent transcatheter arterial embolization (TAE) for treatment of neoplasms, were investigated to determine the effects TAE on coagulation and fibrinolysis. was followed by a significant decrease in platelet count (P less than .001); prolongation prothrombin time an early increase levels fibrinopeptide A .01), B beta-15-42 .001), fibrin(ogen) degradation products delayed...

3′-(N-Phthalimido)glutarimide, commonly known as thalidomide (TD), is one of the most famous chiral drugs, because its tragic history. Although R-enantiomers TD have positive medical effects, S-enantiomers dangerous side and consequently, enantiomeric purity in a solid state inversion physiological conditions attracted considerable attention prompted discussion on "TD paradox". Subsequently, physicochemical properties been indicated to be essential those solution for understanding...

Copper oxide high-temperature superconductors, such as Bi

For chiral liquid crystals that express topologically protected defects and thermally driven mechanical rotation, the size- temperature-driven reversal of rotational direction their droplets was demonstrated even under a fixed temperature gradient. This unconventional indicates dependence thermomechanical coupling on molecular orientational order, this is justified through an examination size, temperature, structure as well by phenomenological arguments order parameter.

A novel compact type slip-power recovery system having sinusoidal rotor currents is proposed. In the proposed system, a PWM boost rectifier used as substitute for diode and chopper in conventional system. The has advantage that ratings of inverter transformer are only 15% motor power capacity. However, remains Therefore, it rectangular current, stator current distorted. use this paper solved problem. effectiveness was verified through computer simulations experiments.