Design of ultrahigh-quality-factor photonic crystal nanocylinder cavities Chao-Sheng Deng, Zhuan Wang, Tao Ouyang, Wen-Liang Liu, Jie Peng and Jian-Xin Zhong EPL, 115 2 (2016) 24001 Published online: 30 August 2016 DOI: 10.1209/0295-5075/115/24001