Fig. 3: Spectra after nonlinear pulse propagation. | Nature Communications

Fig. 3: Spectra after nonlinear pulse propagation.

From: Ultrafast-nonlinear ultraviolet pulse modulation in an AlInGaN polariton waveguide operating up to room temperature

Fig. 3: Spectra after nonlinear pulse propagation.The alternative text for this image may have been generated using AI.

a, b Colour maps of the output intensity I relative to the peak I0 vs. wavelength, λ, and position y transverse to the propagation direction for increasing pulse energy coupled into the waveguide and at temperatures T = 10 K (a) and at T = 200 K (b). The injected pulses had central wavelength λ = 355 nm and propagation distance L = 100 μm. c–e Spectra integrated along y for a range of temperatures, T = 8 K (c), 250 K (d), and 300 K (e) all at pulse-exciton detuning Δ ~  −90 meV. f–h Spectra integrated along the y-direction for a range of detunings Δ ~ −60 meV (f),−80 meV (g), and −100 meV (h) all at T = 200 K.

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