ADOPT Seminar: Frequency Conversion Devices based on Ferroelectric materials and III V Compounds
KTH Applied Physics seminars
Thursday 30 January 2014
to 11:00 at
Prof. Moti Katz (SOREQ)
Frequency conversion of light by Quasi Phase-Matching (QPM) based on periodically poled, nonlinear ferroelectric crystals (LiNbO3, LiTaO3 and KTP), has been widely demonstrated at our labs in the past few years. Recent results of our frequency conversion experiments, and the limitations of the ferro-electric crystals will be presented.
III-V Semiconductor materials such as GaAs offer a larger nonlinear coefficient and an extensive transparency range. The quasi phase-matching in such devices is achieved through an orientation-patterned GaAs (Op-GaAs) structure. The crucial steps in the process are the preparation of the orientation-patterned templates, and the MOCVD growth of GaAs- based layers on these templates. The main processing methods, together with the difficulties involved in the production of such devices, suitable for efficient frequency conversion, will be discussed.