title: Robust adiabatic sum frequency conversion.
abstract: We discuss theoretically and demonstrate experimentally the robustness of the adiabatic sum frequency conversion method. This technique, borrowed from an analogous scheme of robust population transfer in atomic physics and nuclear magnetic resonance, enables the achievement of nearly full frequency conversion in a sum frequency generation process for a bandwidth up to two orders of magnitude wider than in conventional conversion schemes. We show that this scheme is robust to variations in the parameters of both the nonlinear crystal and of the incoming light. These include the crystal temperature, the frequency of the incoming field, the pump intensity, the crystal length and the angle of incidence. Also, we show that this extremely broad bandwidth can be tuned to higher or lower central wavelengths by changing either the pump frequency or the crystal temperature. The detailed study of the properties of this converter is done using the Landau-Zener theory dealing with the adiabatic transitions in two level systems.
authors: Physics of Complex System, Weizmann Institute of Science, Rehovot, 76100, Israel.
authors: Haim
authors: H
authors: Suchowski
authors: Vaibhav
authors: V
authors: Prabhudesai
authors: Dan
authors: D
authors: Oron
authors: Ady
authors: A
authors: Arie
authors: Yaron
authors: Y
authors: Silberberg
mesh_terms: D000465:Algorithms; D003460:Crystallization; D004867:Equipment Design; D007259:Infrared Rays; D008027:Light; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D010825:Physics / Q000379:methods; D013055:Spectrophotometry, Infrared / Q000379:methods; D013696:Temperature