Fig. 1: Dielectric membrane metasurface for high-harmonic generation.
From: Unconventional high-harmonic generation in resonant membrane metasurfaces
a Concept of high-harmonic generation from resonant membrane metasurfaces. The inset shows the structure’s unit cell and the definition of its geometrical parameters. b SEM image of the metasurface and its unit cell. The metasurface structural parameters are h = 1 μm, d = 1.69 μm, a = 0.73 μm, and b = 0.4 μm.
