We design three-dimensional (3D) metallic nanowire media with different structures and numerically demonstrate that they can be homogeneous effective indefinite anisotropic by showing their dispersion relations are hyperbolic. For a finite slab, nice fitting procedure is exploited to obtain the from which we retrieve permittivities. The pseudo focusing for real 3D wire medium agrees very well having permittivity tensor of medium. Studies also show in long-wavelength limit, hyperbolic...

We present a computational scheme allowing for self-consistent treatment of dispersive metallic photonic metamaterial coupled to gain material incorporated into the nanostructure. The is described by generic four-level system. A critical pumping rate exists compensating loss metamaterial. Nonlinearities arise due depletion beyond certain strength test field. Transmission, reflection, and absorption data as well retrieved effective parameters are presented lattice resonant square cylinders...

Massless Dirac fermions with a pseudospin of $\frac{1}{2}$ are tied to many intriguing properties graphene. Previous studies have discussed the possibility constructing higher system in artificial lattices ultracold atoms, which can also support equally interesting physical properties. The authors this paper demonstrate that photon transport certain photonic crystals corresponds pseudospin-1 system. This is significant development because, contrary systems, offer better opportunity study...

We present a computational approach, allowing for self-consistent treatment of three-dimensional fishnet metamaterial coupled to gain material incorporated into the nanostructure. show numerically that one can compensate losses by incorporating inside structure. The pump rate needed loss is much smaller than bulk and figure merit $[\text{FOM}=|\text{Re}(n)/\text{Im}(n)|]$ increases dramatically with rate. Transmission, reflection, absorption data, as well retrieved effective parameters, are...

A self-consistent computational scheme is presented for one-dimensional (1D) and two-dimensional (2D) metamaterial systems with gain incorporated into the nanostructures. The described by a generic four-level system. loss compensation lasing behavior of system are studied. critical pumping rate exists compensating losses metamaterial. There wide range input signals where composite behaves linearly. Nonlinearities arise stronger due to depletion. retrieved effective parameters one layer...

We present a computational approach, allowing for self-consistent treatment of split ring resonator (SRR) array with gain layer underneath. apply three different pumping schemes on the layer: (1) homogeneously pumped isotropic gain, (2) shadow cast by SRR and (3) anisotropic in selected direction only. show numerically magnetic losses can be compensated gain. The difference loss compensations among is analyzed electric field distribution. Studies also dielectric background does not affect...

Photonic crystals with a finite size can support surface modes when appropriately terminated. We calculate the dispersion curves of for different terminations using plane-wave expansion method. These nonradiative be excited help attenuated total reflection technique. did experiments and simulations to trace band curve, both in good agreement numerical calculations.

We discovered unique Anderson localization behaviors of pseudospin systems in a 1D disordered potential. For pseudospin-1 system, due to the absence backscattering under normal incidence and presence conical band structure, wave are entirely different from those conventional systems. show that there exists critical strength random potential ([Formula: see text]), which is equal incident energy below length [Formula: text] decreases with for fixed angle But drops abruptly minimum at rises...

Bi-based layered ferroelectric thin films of Sr2Bi4Ti5O18 (SBTi) were prepared by pulsed-laser deposition. The c-axis-oriented SBTi grown on SrRuO3 seeded Pt/TiO2/SiO2/Si substrates while polycrystalline substrates. measurements ferroelectricity revealed that the direction spontaneous polarization was not along c axis since much less than randomly oriented films. There no significant degradation switchable charge at least up to 1011 cycles for films, suggesting that, even with Ti which...

We demonstrate the angular selection of incident electromagnetic waves using photonic crystals (PCs) composed a square lattice dielectric rods which exhibit position-varying Dirac conical dispersion at Brillouin zone boundary. At frequency point, transmittance can reach unity particular angle associated with dispersion, while for all other angles are reflected due to existence directional band gap. By changing size rods, position point boundary is variable, makes transmission customizable....

It is well known that for ordinary one-dimensional (1D) disordered systems, the Anderson localization length $\xi$ diverges as $\lambda^m$ in long wavelength limit ($\lambda\rightarrow \infty$ ) with a universal exponent $m=2$, independent of type disorder. Here, we show rigorously pseudospin-1 systems exhibit non-universal critical behaviors when they are subjected to 1D random potentials. In such find $\xi\propto \lambda^m$ $m$ depending on For binary disorder, $m=6$ and fast divergence...

Abstract It has been shown recently that the backscattering of wave propagation in one-dimensional disordered media can be entirely suppressed for normal incidence by adding sample-specific gain and loss components to medium. Here, we study Anderson localization behaviors electromagnetic waves such gain-loss balanced random non-Hermitian systems when are obliquely incident on media. We also case profile is slightly altered so occurs. Our results show system behaves differently from Hermitian...

Intelligent home automatic system will not only enable the residents to integrate or distribute controlled-homely interior equipment via Web telephone, but also realize remote monitoring of security systems, including anti-theft, anti-gas leak, fire and other functions, which is future direction intelligent home. The high-speed growth computer control technology electronic information communication led birth We know that general circuit Ethernet design has good expansibility upgrading...

By exploiting the scaling invariance of photonic band diagrams, a complementary crystal slab structure is realized by stacking two uniformly scaled double-zero-index dielectric slabs together. The space cancellation effect in crystals demonstrated both numerical simulations and microwave experiments. refractive index dispersion experimentally measured. Using pure dielectrics, our will be an ideal platform to explore various intriguing properties related medium.

We review some recent progress in the exploration of pseudospin-1 physics using dielectric photonic crystals (PCs). show physical implications PCs exhibiting an accidental degeneracy induced conical dispersion at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi mathvariant="normal">Γ</mml:mi></mml:mrow></mml:math> point, such as realization zero refractive index medium and Berry phase a loop around nodal point. The states near Dirac-like point can be...

We build an effective impedance for two-dimensional (2D) photonic crystals (PCs) comprising a rectangular lattice of dielectric cylinders with the incident electric field polarized along axis cylinders. In particular, we discuss feasibility constructing case where Bloch wave vector is far away from center Brillouin zone, optical response PC necessarily anisotropic, and hence description becomes inevitably angle dependent. employ scattering theory treat 2D system as stack 1D arrays. consider...

In the past, managers of electric power department know situation whether network works well, by recording all kinds monitoring data artificially, or setting some observations for video surveillance with aid ISDN. While has a lot advantages, there are still many inadequacies, such as, requiring complex digital terminal, responding slowly, building on small scale and costing highly. These constrain development it. Through large number experimental studies, using China Mobile's GPRS wireless...

Developing effective and low-cost enzyme-like nanomaterials to kill bacteria is vital for human health. Herein, nanorod-assembled NiCo2O4microspheres were prepared though a facile hydrothermal method, andshowed highly enhanced peroxidase-like activity compared pure Co3O4due its large surface area abundant active sites. The NiCo2O4possess the ability catalyze H2O2to generate amounts of •O2-, which can be used bacteriostatic applications. In particular, antibacterial system combining spiky...

To replace the heavy desktops to perform operations of administration intelligent door lock, 32-bit ARM CPU PHILIPS has been chosen as core and real time operating system muC/OS-II platform deal with data through way wireless transmission. We have successfully developed a portable control lock solved inconvenience caused by fact that cannot be moved operate, which can conveniently administrate clienteles in hotel.

It was commonly modified a thermocouple transducer artificially and piecewise through the presupposed values in order to compensate its nonlinearity effects on temperature measurement. In doing so, although it can solve some errors measurement, parameters appear be divergent from one another for same group of transducers, hence compensations must executed each them. The work is heavy, efficiency low effect poor. Just those reasons, designers have been obsessed with such sort issues, which...

Pseudospin is of central importance in governing many unusual transport properties graphene and other artificial systems which have pseudospins 1/2. These unconventional are manifested phenomena such as Klein tunneling, collimation electron beams one-dimensional external potentials. Here we show that certain photonic crystals (PCs) exhibiting conical dispersions at the center Brillouin zone, eigenstates near "Dirac-like point" can be described by an effective spin-orbit Hamiltonian with a...