Cryogenic Second-Harmonic Generation in Periodically Poled Lithium Niobate Waveguides
M. Bartnick, M. Santandrea, J.P. Höpker, F. Thiele, R. Ricken, V. Quiring, C. Eigner, H. Herrmann, C. Silberhorn, T. Bartley, Physical Review Applied (2021).