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We demonstrate asymmetric conical diffraction accompanied by pseudospin-mediated non-integer phase singularities when two sublattices of photonic graphene are equally excited near the Dirac points. Experimental and numerical results agree with analysis of the Dirac equation.
Defects could be inevitably generated during the growth or the artificial operation of graphene. The existence of structure defects could be influence to excellent properties of graphene. Non-equilibrium molecular dynamics (NEMD) simulations was used to investigate the thermal conductivity of graphene with single vacancy (SV) and stone-wales (SW) defects. Dependence of temperature showed that thermal...
Defects could be inevitably generated during the growth or the artificial operation of graphene. The existence of structure defects could be influence to excellent properties of graphene. Non-equilibrium molecular dynamics (NEMD) simulations was used to investigate the thermal conductivity of graphene with single vacancy (SV) and stone-wales (SW) defects. Dependence of temperature showed that thermal...
Growth of GaN on silicon is investigated to realize semiconductor device on silicon substrate. Our experiment's emphasis is focused on different of structure of interlayer on Si(111) substrate to growth high quality GaN layer. For the large mismatch coefficient between of Si and GaN, which result in the crake and defect. By investigating the different structure, we can draw a conclusion on what kind...
We study symmetry-breaking of the multi-vortex Bloch modes in optically induced hexagonal lattices. Such symmetry-breaking results from either exciting with an anisotropic beam or inducing an anisotropic photonic lattice.
In this paper, we consider a robust approximate lattice alignment design for K-pairs quasi-static MIMO interference channels. The traditional interference alignment on the signal space is infeasible for K > 3 and perfect channel state information (CSI) is required for all the alignment schemes in the literature, which is impractical in practice. Furthermore, the structured lattice, widely used...
We report on the controllable band-gap structure and nonlinear localized states of light in two-dimensional photonic superlattices. Bright gap solitons and vortex solitons residing in an additional mini-gap due to the extra periodicity are presented.
Undesired residual strain always exists in the epitaxial film inevitably as a result of lattice mismatch and thermal expansion mismatch between the substrate and the epitaxial film. The strain affects crystalline quality as well as optical and electrical properties of LED epitaxial film. In this paper, we report on the effects of strain on the emission properties of III-nitrides based LEDs grown on...
We report the first demonstration of 2D quasi-localized solitons near a saddle point of diffraction surfaces. These solitons arise from a balance between saddle-shaped diffraction and hybrid nonlinearity in optically-induced ionic-type photonic lattices.
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