Fig. 1: Integrated high contrast grating cavity.
From: Integrated, ultrafast all-optical polariton transistors with sub-wavelength grating microcavities

a Sketch of integrated high contrast grating (HCG) cavity embedded within the active polymer (MeLPPP) and encapsulation layer (Al2O3). b Scanning electron microscopy image (top view) of a fabricated device without polymer layer. c−e Different cross-sectional views of the electromagnetic field map of the resonant optical mode in the cavity, obtained using three-dimensional finite-difference time-domain (3D FDTD) simulations. The color scale shows the dominant y-component of the electric field (Ey) of the optical mode. Overlaid in black are the outlines of the structure