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. © 2007 Optical Society of America.
Compact and efficient injection of light into band-edge slow-modes / Velha, Philippe; Hugonin, J. P.; Lalanne, P.. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 15:10(2007), pp. 6102-6112. [10.1364/OE.15.006102]
Compact and efficient injection of light into band-edge slow-modes
VELHA, PHILIPPEPrimo
;
2007-01-01
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. © 2007 Optical Society of America.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
