Here we show what determines the optical resolution in laser microscopy. We define the expanded resolution limit (spatial frequency cutoff ) that includes the classic Abbe definition as 2 NA/λ, where λ is the wavelength. The resolution limit can approximate‐ ly be redefined as the frequency cutoff αNA/λ, where α is the constant that depends on the optical process occurring in the sample. In the...

We report on the generation of THz waves through optical rectification in ZnTe femtosecond laser pulses whose photon energy is tuned from below to above bandgap energy. The signal exhibits a pronounced peak at energy, frequencies for which losses remain small. This likely due resonance nonlinear susceptibility vicinity bandgap.

In present investigation L-lysine doped ADP crystal has been grown by slow evaporation technique. The crystalline nature of the grown crystal was confirmed using powder X-ray diffraction technique. The optical studies were carried to examine optical transparency and determine the optical constants of the grown crystal quenching the optoelectronics applications. The optical band gap of grown cry...

Abstract Generalized Kramers–Kronig (K–K) type dispersion relations and sum rules are derived in the static limit for moments of degenerate four wave mixing susceptibility. The nonlinear susceptibility is different from a typical use conventional K–K relations, which assume absence complex poles function upper half frequency plane, whereas has simultaneous both planes. In derivation generalized...

  Objective: Bioactive glass 45S5 is a surface reactive glass-ceramic biomaterial, developed in 1969. BAG 45S5 with particle size of 20-60 nm has the ability of bone regeneration, broad spectrum antibacterial effect, repairs and replaces diseased or damaged bone. The aim of this study was to evaluate the antibacterial activity and determine MIC and MBC values of nano-BAG45S5 on Streptococcus mu...

introduction: this study seeks to discuss the light wave transport characteristics variation along the pericardium meridian under different pressures. methods: we selected 36 healthy students at the school for this study, tied up the desktop blood pressure cuff onto subjects’right proximal arms, fixed the detection probe immovably on the neiguan (pc6) acupoint and the reference point which was ...

A method for calculations of the frequency-dependent nonlinear susceptibility of inorganic materials is implemented in the velocity gauge using a linear combination of atomic orbitals (LCAO) method within the framework of either the Hartree–Fock approximation or density functional theory. It is based on the standard time-dependent diagrammatic perturbation theory and has previously been applied...