Guided-wave devices with fixed losses inspired by PT-symmetry and their spectrum singularity

Henri Benisty (1) , Aloyse Degiron (2) , Anatole Lupu (2)

1 Laboratoire Charles Fabry / Naphel
2 IEF - Institut d'électronique fondamentale

Guided-wave devices with plasmonic-type fixed losses can be adapted to exploit the singular point behavior well known for exact PT symmetric guides. Coupled guides having fixed losses and variable gain fail to exhibit a singular point in their eigenvalues if the guides! effective indices coincide. We show how to "heal# this situation and restore singularity by detuning among the guides. We also present a frame inspired by Kogelnik!s representations of alternate 'E couplers to usefully account for several configurations.

Domaines: Optique [physics.optics]

Henri Benisty, Aloyse Degiron, Anatole Lupu. Guided-wave devices with fixed losses inspired by PT-symmetry and their spectrum singularity. 4th International Conference on Metamaterials, photonic crystals and plasmonics (META13), Mar 2013, Sharjah, United Arab Emirates. ⟨hal-00857669⟩