Regensburg 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DF: Fachverband Dielektrische Festkörper

DF 19: Poster 2

DF 19.23: Poster

Mittwoch, 13. März 2013, 15:00–17:30, Poster B2

Holographic image recording in nominally undoped, thermally reduced LiNbO₃ using small bound polarons — •Sarah Masch, Hauke Brüning, and Mirco Imlau — School of Physics, Osnabrück University, Germany

An experimental setup for the study of holographic image recording is presented that uses a new type of hologram recording mechanism in nominally undoped, thermally reduced LiNbO₃. By means of single intense ns-laser pulses (λ = 532 nm) short-lived volume gratings with high diffraction efficiencies occur [1,2]. These gratings are based on spatially modulated densities of small bound polarons and can be described as mixed gratings as they originate from both the light-induced absorption of the polarons as well as from a polaronic change of the refractive index. Due to their fast generation on the fs-scale, such small polaron-based gratings offer unique properties needed for real-time holographic applications. We demonstrate the successful application of this type of recording mechanism using cross polarized beams for both recording and read-out. The impact of our findings for ultrafast real-time holography is discussed.

[1] H. Bruening et al., Optics Express 20, 13326 (2012)

[2] M. Imlau et al., Optics Express 19, 15322 (2011)

*Financial support by the DFG (IM37/5 and INST190/137-1) and DAAD (50445542) is gratefully acknowledged.