The work on fast topology optimization is out
Many processes depend superlinearly on light intensity (that is: two photons are more than twice as better as one). This work shows how to efficiently design lossless ultrathin dielectric optical metasurfaces to achieve extremely large light intensities. The concept can benefit nonlinear optical processes such as photothermal catalysis, light-driven desalination or higher-harmonics generation.
Interestingly, we also show that sometimes it is better to give up some input power (i.e., lose some energy) if that translates into more local field intensities.
Thanks to Yage Zhao and Ming Zhang and great collaboration with Nordlander’s group
