Fig. 4: Humidity control of PL radiation.
From: Switchable unidirectional emissions from hydrogel gratings with integrated carbon quantum dots
a Experimental setup for the PL measurement with humidity applied. b Measured angle-resolved reflection intensity alteration under the middle RH (red) and high RH (blue) conditions at the normal incidence. c Simulated the angular intensity change from the morphological transformation of hydrogel grating. d, e Experimentally measured far-field angular dispersion of PL emission from Q-HIG under the middle and high RH, respectively. f Line plots of the corresponding PL intensity in (d, e), as marked by dashed lines.
