Tailored KTP and LiNbO3 waveguide structures for counter-propagating parametric down-conversion processes (B05)

• Subject Area: Experimental Condensed Matter Physics
• Term: from 2018 to 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 231447078

This project aims at the fabrication of periodically poled waveguide structures with ultrashort periods in lithium niobate and KTP for counter-propagating parametric down conversion. We will focus on the development of the technological processes required to achieve ultra short domain periods in a combined technological and analytical approach in close cooperation with theoretical materials physics. The realized structures will be investigated for the applicability in real PDC sources in terms of their nonlinear optical properties. Achieving counter-propagating parametric down conversion will enable bright and narrowband single photon sources necessary for novel quantum optical experiments.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 142: Tailored nonlinear photonics: From fundamental concepts to functional structures
• Applicant Institution: Universität Paderborn
• Project Heads: Dr. Gerhard Berth; Professorin Dr. Christine Silberhorn