70 citations · 644 across the 34 of their papers we have counts for
13 papers · 1 filter
Ultraviolet Photodetectors based on GaN and AlGaN/AlN Nanowire Ensembles: Effects of Planarization with Hydrogen Silsesquioxane and Nanowire Architecture
E. Akar, I. Dimkou, A. Ajay +2
The interest in nanowire photodetectors stems from their potential to improve the performance of a variety of devices, including solar cells, cameras, sensors, and communication sy…
Comparison of the material quality of AlxIn1-xN (x ~ 0-0.50) films deposited on Si (100) and (111) by reactive RF sputtering
M. Sun, R. Blasco, M. de la Mata +5
Here, we compare the material quality of AlxIn1-xN layers deposited on Si with different crystallographic orientations, (100) and (111), via radio-frequency (RF) sputtering. To mod…
Optical net gain measurement on AlGaN/GaN multi-quantum well
Quang Minh Thai, Sergi Cuesta, Lou Denaix +5
We present net gain measurements at room temperature in AlGaN/GaN 10-period multi-quantum well emitting at 367 nm, using the variable stripe length method. Measur…
A Photonic Atom Probe Analysis of the Effect of Extended and Point Defects on the Luminescence of InGaN/GaN Quantum Dots
I. Dimkou, J. Houard, N. Rochat +6
We report a correlative microscopy study of a sample containing three stacks of InGaN/GaN quantum dots (QDs) grown at different substrate temperature, each stack consisting of 3 la…
Polarization doping ab initio verification of the concept charge conservation and nonlocality
Ashfaq Ahmad, Pawel Strak, Pawel Kempisty +10
In this work, we study the emergence of polarization doping in AlxGa1-xN layers with graded composition from a theoretical viewpoint. We demonstrate that the charge conservation la…
Solubility limit of Ge Dopants in AlGaN: a Chemical and Microstructural Investigation down to the Nanoscale
C. Bougerol, E. Robin, E. Di Russo +5
Attaining low resistivity AlGaN layers is the keystone to improve the efficiency of light emitting devices in the ultraviolet spectral range. Here, we present a microstructural ana…