Structural, optical and electronic properties and elastic constants of Be1–xZnxS alloys have been studied by employing the commercial code Castep based on density functional theory. The generalized gradient approximation and local density approximation were utilized as exchange correlation. Using elastic constants for compounds, bulk modulus, band gap, Fermi energy and Kramers–Kronig relations,...

We present the first demonstration, to our knowledge, of a label-free flow cytometer for the analysis of biological specimens using multiplex coherent anti-Stokes Raman scattering (MCARS) and elastic scatter measurements. The MCARS system probes the Raman vibrational energy levels and the elastic scatter provides morphological information. We demonstrate these capabilities by probing a culture ...

We present the first experimental investigation of modulational instability in a layered Kerr medium. The particularly interesting and appealing feature of our configuration, consisting of alternating glass-air layers, is the piecewise-constant nature of the material properties, which allows a theoretical linear stability analysis leading to a Kronig-Penney equation whose forbidden bands corres...

Kramers-Kronig (KK) receiver shows strong feasibility since the phase can be extracted from detected intensity through Hilbert transform (HT). To reduce complexity and make HT more suitable for practical KK system, approximated as finite impulse response (FIR) filter, i.e., HT-FIR filter. However, Fourier series expansion of filter suffers oscillations around discontinuities further results in ...

An optical communication link is proposed for high speed point-to-point data transmission. The incorporates both fiber and wireless technologies. Kramer-Kronig coherent detection used due to its component implementation simplicity. Spatial multiplexing, via a multi-core followed by link, wavelength division multiplexing allow the efficient exploitation of all available degrees freedom. signal-t...

Silicon thin layers are deposited on glass substrates with the thickness of 103 nm, 147 nm and 197 nm. The layers are produced with electron gun evaporation method under ultra-high vacuum condition. The optical Reectance and the Transmittance of produced layers were measured by using spectrophotometer. The optical functions such as, real and imaginary part of refractive index, real and imaginar...