Numerical investigation of high-contrast ultrafast all-optical switching in low-refractive-index polymeric photonic crystal nanobeam microcavitiesZi-Ming Meng, Xiao-Lan Zhong, Chen Wang and Zhi-Yuan LiEPL, 98 5 (2012) 54002DOI: https://doi.org/10.1209/0295-5075/98/54002