R. Van Laer, A. Bazin, B. Kuyken, R. Baets, and D. Van Thourhout, “Net on-chip Brillouin gain based on suspended silicon nanowires,” New Journal of Physics, vol. 17, no. 11, p. 115005, Nov. 2015, https://doi.org/10.1088/1367-2630/17/11/115005.