Photonic crystals based on graphene plasmons (GPs) are highly tunable and can accurately control photonic transmission at the nanoscales. In this work, transfer matrix method (TMM) is introduced to study plasmonic crystal (GPC) with periodic surface conductivity in case of normal incidence. The introduction TMM after considering abnormal phase scattering abrupt interface gives an idea manipulat...

Regarding the effect of initial geometric defect (IGD) on static stability single-layer reticulated shells, its distribution pattern and magnitude are main concerns to researchers. However, suitable selection (IGDM) is still a controversial topic. Therefore, it intended study determination proper IGDM based structure force state (SFS) coefficient. In order find out qualified IGDM, more than 520...

The structures and vibrational properties of a series of styryl-substituted sexithiophenes and their charged species have been examined using resonance Raman spectroscopy in conjunction with density functional theory calculations. The calculated geometries of the radical cations and dications indicate that the quinoidal charged defects are more strongly localized in the center of the thiophene ...

background: congenital heart disease (chd) is the most common congenital anomaly in newborns. this study was performed to determine the live birth incidence of chd by ethnicity and sex in gorgan, northern iran. methods: in this longitudinal, hospital-based study, 18162 live births in dezyani hospital in gorgan, north of iran, were screened for chd, from 2007 through 2009. clinical examination, ...

We propose a novel approach to confine light in a silica microfiber (MF) cavity using a lattice-constant-varying nanohole array. The MF cavity integrated with an optimally designed nanohole array produces Q-factors ~ 7×10 in the near infrared region while its mode volume remains ~ (λe). Our MF cavity of enhanced performance will find potential applications in fiber lasers, nonlinear fiber optic...

Objective(s): Use of a positron emission tomography (PET)/single-photonemission computed tomography (SPECT) system facilitates the simultaneousacquisition of images with fluorine-18 fluorodeoxyglucose (18F-FDG) andtechnetium (99mTc)-tetrofosmin. However, 18F has a short half-life, and 511keV Compton-scattered photons are detected in the 99mTc energy window.Therefore, in this study, we aimed to ...

We show theoretically that range of reflection bands and defect modes inside the band gap can be tuned by using a one-dimensional tilted photonic crystal (TPC) structure. A TPC structure is similar to the conventional PC structure with the only difference that in this case alternate layers are inclined at certain angle in the direction of periodicity of the structure. In order to obtain the ref...