1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Natural focusing of x rays from ferroelectric lithium niobate wafers
Rent:
Rent this article for
USD
10.1063/1.2794404
/content/aip/journal/apl/91/14/10.1063/1.2794404
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/14/10.1063/1.2794404
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

X-ray catastrophe focusing from reversed domains in lithium niobate. Top panel is an x-ray topograph of the [00.12] reflection from a reverse-poled thick lithium niobate -axis wafer oriented on a six-circle diffractometer, recorded with an x-ray camera having a pixel size and using a exposure time. One large hexagonal domain covers the right half, with numerous small domains on the left. (Scale bar denotes .) Carbon films were deposited on opposite wafer faces, providing electrically conducting surfaces transparent to the x rays. Succeeding panels were obtained with static applied voltages as labeled, showing a gradual focusing into caustics. Images acquired with an undulator and Si(111) monochromator at Sector 1 of the Advanced Photon Source (Argonne).

Image of FIG. 2.
FIG. 2.

Ray-tracing model of x-ray caustic formation. Main panel traces a set of x rays specularly reflected from a sinusoidally modulated surface, with the axis greatly expanded (millimeter units) compared to the axis (meters). Top panel shows the simple diffraction geometry, with undulator radiation well approximated as ideal parallel rays diffracting from a lithium niobate wafer with a controllable applied voltage across its thickness; inset indicates the periodic ferroelectric domain reversal pattern.

Image of FIG. 3.
FIG. 3.

Caustic formation from induced domains in unpoled lithium niobate. Top panel is an x-ray topograph of a thick lithium niobate wafer that had not been initially polarized. (Scale bar denotes .) Subsequent panels with 412, 504, and reveal reversible caustic formation associated with induced domains of opposite polarities.

Loading

Article metrics loading...

/content/aip/journal/apl/91/14/10.1063/1.2794404
2007-10-05
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Natural focusing of x rays from ferroelectric lithium niobate wafers
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/14/10.1063/1.2794404
10.1063/1.2794404
SEARCH_EXPAND_ITEM