Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Laser Development: Nonlinear Effects

Q 40.4: Vortrag

Mittwoch, 25. März 2015, 11:45–12:00, K/HS2

Efficient and Broadband Frequency Generation by Composite Crystals — •Genko Genov1, Andon Rangelov2, and Nikolay Vitanov21Institute of Applied Physics, Technical University of Darmstadt, Hochschulstrasse 6, 64289 Darmstadt, Germany — 2Department of Physics, St. Kliment Ohridski University of Sofia, 5 James Bourchier blvd, 1164 Sofia, Bulgaria

Composite pulse sequences have been used for several decades in nuclear magnetic resonance, and lately, in quantum information processing. Novel universal broadband composite pulses have been introduced recently that perform robust population transfer and compensate errors in any experimental parameter and for any pulse shape [1]. These sequences were also experimentally implemented for efficient and robust rephasing of atomic coherences in doped solids.

We introduce another interesting application that uses an analogy with the universal composite pulses: composite crystals for efficient broadband sum and difference frequency generation [2]. This technique delivers high efficiency and robustness to parameter variations, e.g., when the phase matching condition is not fulfilled. It is a viable alternative to the adiabatic approaches because it requires much lower input intensity and shorter nonlinear crystals. It also works both with continuous-wave and pulsed lasers, as well as in the linear and nonlinear regimes of depleted and undepleted pump, respectively.

[1] G. T. Genov, D. Schraft, T. Halfmann, N. V. Vitanov, Phys. Rev. Lett. 113, 043001 (2014). [2] G. T. Genov, A. A. Rangelov, N. V. Vitanov, J. Opt. 16, 062001 (2014).

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