Diffraction in TEM - Introduction

Wave Propagation Vector, K

or

Scattering From A Crystal

Defects in GaAs/InGaAs Laser Note that the laser looks to have a perfect crystal structure when using g=200[011], electron diffraction vector at the zone axis [011], but actually has dislocations, which moved into the active region by creep, when viewed using different diffraction contrast imaging conditions using g=220[110] diffraction vector at the [110] zone axis.

Diffraction From Planes

Dynamic Diffraction

Diffraction From Zone Axis The [111] zone axis of Al Note that

Selected Area Diffraction

TEM Diffraction Summary