Optical birefringence imaging of x-ray excited lithium tantalate
X-ray absorption in lithium tantalate induces large, long-lived (∼10−5 s) optical birefringence, visualized via scanning optical polarimetry. Similar birefringence measured from glass, sapphire, and quartz was two orders of magnitude weaker; much of this reduction can be accounted for by their small...
Gespeichert in:
Veröffentlicht in: | APL photonics 2017-08, Vol.2 (8), p.086102-086102-7 |
---|---|
Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | X-ray absorption in lithium tantalate induces large, long-lived (∼10−5 s) optical birefringence, visualized via scanning optical polarimetry. Similar birefringence measured from glass, sapphire, and quartz was two orders of magnitude weaker; much of this reduction can be accounted for by their smaller cross section for x-ray absorption. While x-ray induced charges can perturb local refractive indices and lead to birefringence, aligned dipoles in the non-centrosymmetric unit cell of ferroelectric LiTaO3 create electric fields that also induce birefringence via electro-optic coupling, which shows up as a dependence on crystal orientation. Time-resolved measurements from LiTaO3 show a prompt response on a picosecond time scale, which along with the long decay time suggest novel opportunities for optical detection of x-rays. |
---|---|
ISSN: | 2378-0967 2378-0967 |
DOI: | 10.1063/1.4997414 |