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Diffraction in TEM - Introduction Wave Propagation Vector, K.

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Presentation on theme: "Diffraction in TEM - Introduction Wave Propagation Vector, K."— Presentation transcript:

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2 Diffraction in TEM - Introduction

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6 Wave Propagation Vector, K

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8 or

9 Scattering From A Crystal

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11 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.

12 Diffraction From Planes

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18 Dynamic Diffraction

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

20 Selected Area Diffraction

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24 TEM Diffraction Summary


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