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NATO Science for Peace and Security Series B: Physics and Biophysics
Terahertz (THz) and Mid-Infrared (MIR) radiation (TERA-MIR) can be transmitted through nearly any material without causing biological harm. Novel and rapid methods of detection can be created with devices operation in these spectral ranges allowing scanning for weapons, detecting hidden explosives (including plastic landmines), controlling the quality of food and a host of other exciting applications...
In this work, we investigate the influence of the substrate material on the temperature distribution in the active region of the nitride-based quantum well UV light-emitting diodes. Results of mathematical modeling show that the application of the GaN substrate leads to a reduction of the averaged temperature in the active region of a few tens of degrees Kelvin comparing with the sapphire substrate.
In this work, we investigate the influence of the indium surface segregation on the differential absorption observed for different inverse biases applied to the structure. Obtained results evidence that the indium surface segregation leads to more sharp dependence of the absorption on the applied bias for a wide frequency range above the red edge. This feature can be used for experimental measurements...
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