Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.83: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Multiplexed image storage by EIT in a doped solid — •Nina Rentzsch, Georg Heinze, Daniel Schraft, and Thomas Halfmann — Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt

The concept of stored light in atomic coherences, driven by electromagnetically induced transparency (EIT) is a promising technique for coherent storage and processing of optical data. Typically, EIT is implemented with single light pulses, which carry single-bit information. However, realistic applications require the storage of much larger amounts of data. Hence, the storage of 2D light patterns (images) by EIT attracted interest in recent years.

To further increase the storage capacity, we apply frequency- and angle-resolved multiplexing to simultaneously store more than one image by EIT in a rare-earth-ion doped solid. The inhomogeneous linewidth of the medium (Pr³⁺:Y₂SiO₅) is in the range of GHz, while the optical transition linewidths are kHz. This enables addressing of different ensembles of Pr³⁺ ions by frequency multiplexing – hence multiplexed data storage by EIT. In addition, we demonstrate EIT multiplexing also by a variation of the angle between the driving laser pulses. Due to phase matching conditions, we can hereby separately address specific ensembles of ions. We experimentally demonstrate, that both multiplexing approaches permit independent, selective storage and readout of more than one image by EIT in a doped solid. Moreover, we demonstrate combination of frequency and angle-multiplexing to further increase the storage capacity in the EIT-driven solid medium.