Ice nucleating particles (INP) active at a few degrees below 0°C are produced by a range of organisms and released into the environment. They may affect cloud properties and precipitation when becoming airborne. So far, our knowledge about sources of biological INP is based on grab samples of vegetation, soil or water studied in the laboratory. By combining measurements of INP concentrations in...

We propose a first principles method of calculating the photo-component of tunneling conductivity of a specific superlattice (SL) photovoltaic structure: an InP/InGaAs P-I(SL)-N solar cell. The method we follow is based on the generalized Greenwood-Kubo formulation and on the causal form of the Green’s function. The vertical conductivity (along the growth direction of the device), under illumin...

Recent progress in semiconductor quantum dot based mode locked lasers is discussed. Sub-picosecond pulse generation and extremely low phase noise have been demonstrated for both InAs/GaAs and InAs/InP material systems. Applications include e.g. OTDM sources and frequency comb generation for WDM systems, all-optical clock recovery at high bit rate or microwave photonics . Keywordsself-assembled ...

We demonstrate electrostatically actuated end-coupled optical waveguide devices in the indium phosphide (InP) material system. The design of a suitable layer structure and fabrication process for actuated InP-based waveguide micro-electro-mechanical systems (MEMS) is reviewed. Critical issues for optical design, such as coupling losses, are discussed and their effect on device performance is ev...

Peripheral circulation is severely compromised in the advanced stages of peripheral arterial disease. Recently, it was shown that the application of -40 mmHg intermittent negative pressure (INP) to the lower leg and foot enhances macro- and microcirculation in healthy volunteers. In this case report, we describe the effects of INP treatment on four patients with lower limb ischemia and hard-to-...

Epitaxial layers of p-type indium phosphide (InP) have been grown by low pressure, metal organic chemical vapour deposition (LP-MOCVD) using diethylzinc (DEZn) as the p-dopant source. Proposed zinc-associated InP point defects and experimental DEZn doping data were used to formulate a point-defect equilibrium model of the Zn doping process of MOCVD InP. The model equation is contrasted with the...

The full-scale progression of optical communications was triggered by the indication in 1966 of the possibility of using low-loss optical fibers for communications. Since then, optical communication technologies have advanced by the development of optical semiconductors such as the laser diode (LD) and photodiode (PD), along with highspeed semiconductor circuit technologies, including the laser...

Single photon detectors sensitive to near-infrared (NIR) wavelength light are used in an increasing number of applications, such as quantum key distribution, laser detection and ranging, and integrated circuit analysis. There are many types of NIR single photon detectors, e.g. photomultiplier tube, superconducting single photon detector and single photon avalanche diode (SPAD). However, the SPA...

Radiative corrections to QCD amplitudes in the quasi-multi-Regge kinematics are interesting in particular since the Reggeized form of these amplitudes is used in the derivation of the NLO BFKL. This form is a hypothesis which must be at least carefully checked, if not proved. We calculate the radiative corrections in the one-loop approximation using the s-channel unitarity. Compatibility of the...

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