Time-bandwidth limit and reciprocity in optical nanostructures (Conference Presentation)

The time-bandwidth limit refers to the trade-off between the time delay that can be applied to a signal as it travels through a device and its bandwidth. Recently, there have been several studies showing that this bound can be broken in nonreciprocal nano-structures, including nonreciprocal cavities and terminated unidirectional waveguides. Here, we explore the physical mechanisms involved in these structures, and explore the opportunities offered by non-reciprocal elements to control the delay applied to an impinging signal.