We investigate the influence of slab thickness on the electronic structure of the Si(1 0 0)- p([Formula: see text]) surface in density functional theory (DFT) calculations, considering both density of states and band structure. Our calculations, with slab thicknesses of up to 78 atomic layers, reveal that the slab thickness profoundly affects the surface band structure, particularly the danglin...

[1] Measurements from the incoherent scatter radar (ISR) and ionosonde over Millstone Hill (42.6 N, 288.5 E) are analyzed to explore ionospheric temporal variations. The F2 layer peak density NmF2, peak height hmF2, and scale height H are derived from a Chapman a layer fitting to observed ISR electron density profiles. Diurnal, seasonal, and solar activity variations of the ionospheric characte...

The quality factor and mode volume of a nanocavity play pivotal roles in realizing the strong coupling interaction between the nanocavity mode and a quantum dot. We present an extremely simple method to obtain the mode volume and investigate the effect of the slab thickness on the quality factor and mode volume of photonic crystal slab nanocavities. We reveal that the mode volume is approximati...

Abstract Ionospheric total electron content (TEC) is one of the key parameters for users radio-based systems, such as Global Navigation Satellite System, high-frequency communication and space-based remote sensing since ionospheric delay proportional to TEC through propagation path. It important know extreme values in readiness hazardous conditions. The purpose this study estimate with occurren...

Abstract The ionospheric equivalent slab thickness ( $\tau $ τ ) is a parameter characterizing both the distribution of plasma in ionosphere and shape corresponding vertical electron density profile. It calculated as ratio total content (vTEC) to F2-layer maximum Nm F2). Since its definition dated back 60s, l...

The shape of the vertical electron density profile is a result production, loss and transportation plasma in Earth’s ionosphere. Therefore, equivalent slab thickness ionosphere that characterizes width profiles an important parameter for better understanding ionospheric processes under regular as well perturbed conditions. defined by ratio total content over peak therefore easy to compute utili...

When a circularly polarized plane wave is normally incident on a slab of a structurally chiral material with local 4̄2m point group symmetry and a central twist defect, the slab can function as either a narrowband reflection hole filter for co–handed plane waves or an ultranarrowband transmission hole filter for cross–handed plane waves, depending on its thickness and the magnitude of the applie...

Using terahertz spectroscopy, we measure the normal-incidence transmission coefficient of photonic crystals consisting of a periodic lattice of air holes in a silicon slab. Sharp resonant features are observed in the transmission spectra due to coupling of the leaky photonic crystal modes, called guided resonances, to the continuum of free-space modes. The resonances show considerable sensitivi...