In
this work, arrays of predominantly relaxed InGaN platelets with
indium contents of up to 18%, free from dislocations and offering
a smooth top c-plane, are presented. The InGaN platelets
are grown by metal–organic vapor phase epitaxy on a dome-like
InGaN surface formed by chemical mechanical polishing of InGaN pyramids
defined by 6 equivalent {101̅1} planes. The dome-like surface
is flattened during growth, through the formation of bunched steps,
which are terminated when reaching the inclined {101̅1} planes.
The continued growth takes place on the flattened top c-plane with single bilayer surface steps initiated at the six corners
between the c-plane and the inclined {101̅1}
planes, leading to the formation of high-quality InGaN layers. The
top c-plane of the as-formed InGaN platelets can
be used as a high-quality template for red micro light-emitting diodes.
This paper applies the peridynamic continuum mechanics theory on a new type of material known as harmonic-structured materials. Using the Peridigm software, rapid uniaxial elongation is simulated on a peridynamic model of a thin bimodal harmonic-structured metal sheet. Mechanical wave initiation, propagation, and reflection, as well as fracture initiation and propagation are successfully simulated.
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