GeSii infrared detectors grown by Rapid Thermal CVD are demonstrated. External quantum efficiency of7% at A=1.32jtm and eye-diagram at 1.5Gbit/s are obtained for Ge2Si71 waveguide pin detectors. It is shown that external quantum efficiency is limited by the fiber to waveguide coupling efficiency. These, along with system considerations suggest that with further improvements, such devices can be...

In the absence of phonon contribution, a weakly coupled single orbital noninteracting quantum dot thermoelectric setup is known to operate reversibly as a Carnot engine. This reversible operation, however, occurs only in the ideal case of vanishing coupling to the contacts, wherein the transmission function is delta shaped, and under open-circuit conditions, where no electrical power is extract...

Apple scab causes significant losses in the production of this fruit. A timely and more site-specific monitoring and spraying of the disease could reduce the number of applications of fungicides in the fruit industry. The aim of this leaf-scale study therefore lies in the early detection of apple scab infections in a non-invasive and non-destructive way. In order to attain this objective, fluor...

Molecular dynamics (MD) simulation and Density functional theory (DFT) methods were applied to the two thiocarbohydrazides derivatives (T1 and T2) as corrosion inhibitors for carbon steel in aqueous phase. Experimental results have shown that the corrosion rate follows the below order: T1>T2. Quantum chemical parameters such as hardness (η), electrophilicity (ω),polarizability (α), dipole momen...

In this paper, photodetection properties of a Graphene-based device at the third telecommunication window have been reported. The structure of the device is a Graphene-silicon Schottky junction which has been simulated in the form of an infrared photodetector. Graphene has specific electrical and optical properties which makes this material a good candidate for optoelectronic applications. Phot...

We measured the quantum efficiency of an H2RG HgCdTe near infrared sensor array. We determine a 2-σ lower limit of 85% for the quantum efficiency averaged over the array and over three observed wavelengths, 3.38μm , 3.9μm , and 4.5μm . The peak quantum efficiency occurs near the center of the sensor and is unity within measurement uncertainty (5%). We used a blackbody, narrowband filters, and a...