Observation of slow light in glide-symmetric photonic-crystal waveguides - Patil, Chirag Murendranath (Technical University of Denmark. Department of Photonics Engineering) ; Arregui Bravo, Guillermo (Institut Català de Nanociència i Nanotecnologia) ; Mechlenborg, Morten (Technical University of Denmark. Department of Photonics Engineering) ; Zhou, Xiaoyan (Niels Bohr Institute) ; Alaeian, Hadiseh (Purdue University. Department of Physics and Astronomy) ; García Fernández, Pedro David (Institut Català de Nanociència i Nanotecnologia) ; Stobbe, Søren (Technical University of Denmark. Department of Photonics Engineering)