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Q: Quantenoptik und Photonik
Q 29: Poster Quanteneffekte
Q 29.3: Poster
Dienstag, 14. März 2006, 16:30–18:30, Labsaal
Coherent Population Transfer by STIRAP in a Solid StateSystem — •Jens Klein and Thomas Halfmann — Fachbereich Physik, TU Kaiserslautern,Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern
Laser assisted manipulation of population distributions in atomic and molecular media in the gas phase using coherent effects and adiabatic processes is extensively studied and well understood. However, it is solid state media which are - due to their high density - of special interest for applications such as data storage, data processing and quantum computing. Coherent population transfer by STIRAP (Stimulated Raman Adiabatic Passage) [1] has never been implemented in solid state systems.
The aim of the experiment presented here is to demonstrate the STIRAP method in a YSO-crystal doped with Pr3+ ions to manipulate population distributions in the hyperfine structure states of the dopant with possible applications in optical data storage. The laser pulses to adress the different transitions are derived from a single cw laser system by intensity modulation and frequency shifting using acusto-optic modulators. The experiment is implemented at a temperature of 4K to reduce homogeneous broadening produced by phonon scattering. The residual inhomogeneous linewidth is effectively reduced by spectral hole burning, i.e. selecting single ensembles of atoms.
[1] N.V. Vitanov, T. Halfmann, B.W. Shore, and K. Bergmann, emphLaser-induced Population Transfer by Adiabatic Passage Techniques, Ann. Rev. Phys. Chem. 52, 763-809 (2001)