Abstract : We design compact (a few wavelength long) and efficient (>99%) injectors for coupling light into slow Bloch modes of periodic thin film stacks and of periodic slab waveguides. The study includes the derivation of closed-form expressions for the injection efficiency as a function of the group-velocity of injected light, and the proof that 100% coupling efficiencies for arbitrary small group velocities is possible with an injector length scaling as log(c/vg). The trade-off between the injector bandwidth and the group velocity of the injected light is also considered.
https://hal-iogs.archives-ouvertes.fr/hal-00846685 Contributor : Marie-Laure EdwardsConnect in order to contact the contributor Submitted on : Friday, July 19, 2013 - 4:19:11 PM Last modification on : Tuesday, October 6, 2020 - 4:30:48 PM Long-term archiving on: : Monday, October 21, 2013 - 11:01:24 AM
Philippe Velha, Jean-Paul Hugonin, Philippe Lalanne. Compact and efficient injection of light into band-edge slow-modes. Optics Express, Optical Society of America - OSA Publishing, 2007, 15 (10), pp.6102-6112. ⟨hal-00846685⟩