Vassili Fedotov

Design of plasmonic toroidal metamaterials at optical frequencies.

Din Ping Tsai, Pin Chieh Wu, Wei Ting Chen, 2012, Optics express.

Focused electromagnetic doughnut pulses and their interaction with interfaces and nanostructures.

Nikolay Zheludev, Nikitas Papasimakis, N. Zheludev, 2015, Optics express.