TY - JOUR AU - Lind, Alexander AU - Kowligy, Abijith AU - Timmers, Henry AU - Cruz, Flavio Caldas da AU - Nader, Nima AU - Silfies, Myles AU - Allison, Thomas AU - Papp, Scott AU - Diddams, Scott C2 - Physical Review Letters DA - 2020-04-01 04:04:00 DO - https://doi.org/10.1103/PhysRevLett.124.133904 LA - en PB - Physical Review Letters PY - 2020 TI - Mid-Infrared Frequency Comb Generation and Spectroscopy with Few-Cycle Pulses and χð2Þ Nonlinear Optics ER -