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. 2016 Jun 13;7:ncomms11880. doi: 10.1038/ncomms11880

Figure 4. GP emission from hot carriers.

Figure 4

Caption and notations same as in Fig. 2. Unlike conventional ČE, most of the emission occurs in the forward direction with a relatively low angular spread as is shown by b. The green dot shows that GPs a particular frequency can be coupled out as light (we assume a grating with period of 3.5 nm). For the parameters used here, ČE emission occurs due to intraband transitions that are becoming allowed by the GP losses, whereas high-frequency (such as ℏω>2EF) emission occurs due to interband transitions at areas of high GP losses. The hot carrier energy Ei=1.9EF. EF as in Fig. 2.