Waveguide sub-wavelength structures: a review of principles and applications Halir, Robert ; Bock, Przemek J. ; Cheben, Pavel ; Ortega-Moñux, Alejandro ; Alonso-Ramos, Carlos ; Schmid, Jens H. ; Lapointe, Jean ; Xu, Dan-Xia ; Wangüemert-Pérez, J. Gonzalo ; Molina-Fernández, Íñigo ; Janz, Siegfried Abstract Publication: Laser & Photonics Reviews Pub Date: January 2015 DOI: 10.1002/lpor.201400083 Bibcode: 2015LPRv....9...25H