• Re-inventing Multimode Interference Couplers Using Subwavelength Gratings 

      Ortega-Moñux, Alejandro; Halir, Robert; Maese Novo, Alejandro; Alonso-Ramos, C.; Zavargo-Peche, Luis; [et al.] (European Physical Society, IEEE, The Optical Society, 2013)
      We use the concept of subwavelength grating (SWG) refractive-index-engineering to propose and experimentally demonstrate a reduced size, slotted 2x2 MMI coupler. We also present an ultra-broadband 2x2 MMI coupler which ...