Yu, C.-C., Imoto, S., Seki, T., Chiang, K.-Y., Sun, S., Bonn, M., et al. (2022). Accurate molecular orientation at interfaces determined by multimode polarization-dependent heterodyne-detected sum-frequency generation spectroscopy via multidimensional orientational distribution function. The Journal of Chemical Physics, 156(9): 094703. doi:10.1063/5.0081209.