Growth and capping of InAs/GaAs quantum dots investigated by x-ray Bragg-surface diffraction

Abstract

Dipole-dipole interaction in a quantum dot and metallic nanorod hybrid system Appl. Phys. Lett. 99, 181106 (2011) Competing influence of an in-plane electric field on the Stark shifts in a semiconductor quantum dot Appl. Phys. Lett. 99, 181109 (2011) Strain-induced tuning of the emission wavelength of high quality GaAs/AlGaAs quantum dots in the spectral range of the 87Rb D2 lines Appl. Phys. Lett. 99, 161118 (2011) Temperature-dependent energy band gap variation in self-organized InAs quantum dots Appl. Phys. Lett. 99, 151909 (2011) Room temperature photoluminescence of high density (In,Ga)As/GaP quantum dots

Hybrid reciprocal lattice: application to layer stress determination in GaAlN/GaN(0001) systems with patterned substrates

“…24,26 For instance, enhancement of intensity along the 111 BC line above the 002 reflection, Dw>0 in Figure 2a, is related to the presence of surface defects that increase the re- scattering of diffracted beam when the 111 reflection is excited, such as reported in GaAs (001) substrates. 27 Moreover, BC lines have also been seen decorating X-ray images collected by zeronoise detectors, in a process called multiple diffuse scattering. 13 Hybrid reflections in hexagonal lattices with strain gradients.…”

Introduction to Python Dynamic Diffraction Toolkit (PyDDT): structural refinement of single crystals via X-ray phase measurements

“…1(b), these excitation geometries are represented by the BC lines in blue (g = À1) and red (g = 1). In addition to indexing azimuthal scans, there are other MD-related phenomena where BC line plots can be helpful: revealing surface structure information via a specific MD geometry, otherwise known as Bragg surface diffraction (Jen & Chang, 1992;Morelha ˜o & Cardoso, 1993;Hayashi et al, 1997;Avanci & Morelha ˜o, 2000;Avanci et al, 1998a;Freitas et al, 2009;Lang et al, 2013;Huang et al, 2014;Zheng et al, 2016), where the 2D intensity distribution around the MD peaks follows the orientation of the BC lines. When single crystals are hit with a high-flux ($10 14 ph s À1 mm À2 ) monochromatic X-ray beam, diffuse multiple scattering (Nisbet et al, 2015) makes BC lines visible on zero-noise area detectors.…”

Assessment of phase transition and thermal expansion coefficients by means of secondary multiple reflections of Renninger scans

“…XRMD has provided many useful contributions to physics and materials science. It has been applied to study dislocations at the interface plane of a GaAs layer on top of an Si(001) substrate (Morelhã o & Cardoso, 1993), growth and capping of InAs/GaAs quantum dots (QDs) with the detection of misorientation in the cap-layer lattice faceting the QDs (Freitas et al, 2009), and single-crystal habit modifications due to the incorporation of impurities at the lattice sites (Lai et al, 2003). It has also allowed the accurate determination, using synchrotron radiation, of the piezoelectric coefficients of organic crystals based on symmetry changes in an applied electric field (Avanci et al, 1998(Avanci et al, , 2000dos Santos et al, 2003).…”