1-nm Line Width, Flux-Resistant Laser Mirror Using a Resonant Grating

A corrugated structure comprising a multidielectric mirror, a waveguide resonant mirror and a buffer is shown to exhibit close to 100% abnormal reflection close to normal incidence at 1064 nm wavelength thanks to the excitation of a guided mode of the structure. A solution is found to overcome the laser damage problem caused by high electric field strength in the narrow band high index metal oxide slab waveguide reflector.