TY - CONF KW - Electric fields KW - High harmonic generation KW - Optical angular momentum KW - Optical vortices KW - Phase matching KW - Spiral phase AU - Guan Gui AU - Nathan Brooks AU - Henry Kapteyn AU - Margaret Murnane AU - Chen-Ting Liao AB - The conservation of spatiotemporal orbital angular momentum (ST-OAM) of light is observed in second-harmonic generation for the first time. The space-time topological charge of the fundamental ST-OAM field is doubled along with the optical frequency. BT - Frontiers in Optics, Laser Science 2021 DA - 2021-12 DO - 10.1364/FIO.2021.FW5C.2 N2 - The conservation of spatiotemporal orbital angular momentum (ST-OAM) of light is observed in second-harmonic generation for the first time. The space-time topological charge of the fundamental ST-OAM field is doubled along with the optical frequency. PB - Optica Publishing Group PY - 2021 EP - FW5C.2 T2 - Frontiers in Optics, Laser Science 2021 TI - Conservation of spatiotemporal orbital angular momentum of light in nonlinear frequency conversion UR - http://opg.optica.org/abstract.cfm?URI=FiO-2021-FW5C.2 ER -