Figure 3 | Scientific Reports

Figure 3

From: A stand-alone fiber-coupled single-photon source

Figure 3

Durability test of the fiber-connection. (a–c) Spectra of a fiber-coupled QD-microlens (Device1) operated in our QSource at T = 40 K after repeated cool-down/warm-up (40 K ↔ 290 K). Emission of the exciton (X), the biexciton (XX), and singly charged trion states (X+ and X−) is identified. (d) Frequency count histogram of the center wavelength of the four QD states extracted from the spectra in the contour plot in (b). (e) Integrated CCD counts of the fiber-coupled QD emission for each individual excitonic complex (lower panel) and its sum (upper panel), evaluated for the spectra shown in (b).

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