Fig. 4: Experimental demonstration of chiral thermal emission with high coherence at δ = 280 nm. | Nature Communications

Fig. 4: Experimental demonstration of chiral thermal emission with high coherence at δ = 280 nm.

From: Full polarization and high coherence control of thermal emissions via saddle-band dispersion engineering

Fig. 4

a, b present the top and cross-sectional scanning electron microscope (SEM) images of the fabricated structure, respectively. Both scale bars correspond to 3 μm. c Schematic of the setup used to characterize the thermal emission properties of the structure. Ap Aperture, QWP Quarter-wave plate, LP Linear polarizer, IFO Interferometer, BS Beam splitter, MM Moving mirror. d Measure signals of LCP thermal emission at 0° output for the device at various temperatures (125, 150, 175, and 200 °C), with the dashed line indicating the blackbody thermal emission signal at 125 °C. e Normalized emissivity spectra for two different chirality at four distinct temperatures. f The central emission wavelength and ECD extracted from (e). g, h Measured LCP and RCP emissions supported by the structure in (a) as a function of the output angle in the y- and x -direction, respectively, with color amplitude representing the emissivity.

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