diffraction in tem - introduction

EM Course – Elastic Scattering

Professor Rodney Herring

Diffraction in TEM - Introduction

Diffraction in TEM - Introduction

Diffraction in TEM - Introduction

Diffraction in TEM - Introduction

Wave Propagation Vector, K

Wave Propagation Vector, K

Wave Propagation Vector, K

or

Scattering From A Crystal

Scattering From A Crystal

Defects in GaAs/InGaAs LaserNote 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

Diffraction From Planes

Diffraction From Planes

Diffraction From Planes

Diffraction From Planes

Diffraction From Planes

Dynamic Diffraction

Diffraction From Zone Axis

The [111] zone axis of Al

202

022

022

Note that 0ug

Selected Area Diffraction

Selected Area Diffraction

Selected Area Diffraction

Selected Area Diffraction

TEM Diffraction Summary