Photonic crystal laser based on Fano interference allows for ultrafast frequency modulation in the THz range

摘要

Replacing a conventional mirror in a photonic crystal laser by one based on Fano interference leads to richlaser dynamics, including realisation of stable self-pulsing and potential for ultra-fast modulation. In particular,the narrowband Fano mirror guarantees single-mode operation and significantly alters the modulation responsecompared to Fabry-Perot lasers. In this work the small-signal response is analysed using a dynamical model basedon coupled-mode theory and rate equations, which shows how the 3-dB bandwidth of the frequency modulationresponse may exceed tens of THz, orders of magnitude larger than for conventional semiconductor lasers.