Three-dimensional nonparaxial accelerating beams from the transverse Whittaker integral Yiqi Zhang, Milivoj R. Belić, Jia Sun, Huaibin Zheng, Haixia Chen, Changbiao Li, Zhiguo Wang and Yanpeng Zhang EPL, 107 3 (2014) 34001 Published online: 24 July 2014 DOI: 10.1209/0295-5075/107/34001