1. µJ-level multi-cycle terahertz generation in a periodically poled Rb:KTP crystal
- Author
-
Michael Hemmer, Valdas Pasiskevicius, Mikhail Pergament, Franz X. Kärtner, Fredrik Laurell, Yi Hua, Kore Hasse, Elias Kueny, Huseyin Cankaya, Frederike Ahr, Patrick Mutter, Giovanni Cirmi, Damian N. Schimpf, Fabian Reichert, Carlota Canalias, Wenlong Tian, Halil T. Olgun, Anne-Laure Calendron, Lu Wang, Andrius Zukauskas, and Nicholas H. Matlis
- Subjects
Materials science ,Sum-frequency generation ,Terahertz radiation ,business.industry ,Energy conversion efficiency ,Potassium titanyl phosphate ,chemistry.chemical_element ,02 engineering and technology ,Photorefractive effect ,021001 nanoscience & nanotechnology ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Rubidium ,Terahertz spectroscopy and technology ,010309 optics ,Crystal ,chemistry.chemical_compound ,Optics ,chemistry ,0103 physical sciences ,0210 nano-technology ,business - Abstract
We demonstrate multi-cycle terahertz (MC-THz) generation in a 15.5 mm long periodically poled rubidium (Rb)-doped potassium titanyl phosphate (Rb:PPKTP) crystal with a poling period of 300 µm. By cryogenically cooling the crystal to 77 K, up to 0.72 µJ terahertz energy is obtained at a frequency of 0.5 THz with a 3 GHz bandwidth. A maximum internal optical-to-terahertz conversion efficiency of 0.16% is achieved, which is comparable with results achieved using periodically poled lithium niobate crystal. Neither photorefractive effects nor damage was observed with up to 900 m J / c m 2 , showing the great potential of Rb:PPKTP for multi-millijoule-level MC-THz generation.
- Published
- 2021