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Figure 10 | Nanoscale Research Letters

Figure 10

From: Ge/Si(001) heterostructures with dense arrays of Ge quantum dots: morphology, defects, photo-emf spectra and terahertz conductivity

Figure 10

Photo-emf spectra of the p–i–n structures. (a) R 163: (1) without bias lighting; (2)–(5) under bias lighting (Ge filter): (2) W=0.25 mW/cm2; (3) W=0.77 mW/cm2; (4) W=1.5 mW/cm2; (5) W=2.16 mW/cm2; (b) R 166: (1) without bias lighting; (2)–(6) under bias lighting (Si filter): (2) W=0.63 mW/cm2; (3) W=3.3 mW/cm2; (4) W=5.3 mW/cm2; (5) W=12 mW/cm2; (6) W=17.5 mW/cm2.

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