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Quantification of the carrier absorption losses in Si-nanocrystal rich rib waveguides at
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View: Figures


Image of FIG. 1.
FIG. 1.

Direct measurement of the intensity of a signal for different pump photon fluxes: (a) full temporal dynamics and (b) under chopped pump conditions (gray dashed line at the bottom).

Image of FIG. 2.
FIG. 2.

Carrier absorption losses of signal as a function of the photon flux. A square-root fit to the experimental data is also shown (solid line). Inset: time resolved photoluminescence measurement performed at a pump photon flux of .

Image of FIG. 3.
FIG. 3.

Top panel: photoluminescence spectrum of the studied sample (interference fringes are observed because of large sample thickness). Bottom panel: normalized dynamical behavior of the excited carrier absorption losses (gray curve). The TR-PL decay (black right) and 1-(TR-PL) decay (black left) line shapes overlapped the CA signal. The TR-PL decay corresponds to that of the spectral range evidenced with a gray circle on the top panel, i.e., around . Stretched exponential fits of CA are also shown (black, dashed).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Quantification of the carrier absorption losses in Si-nanocrystal rich rib waveguides at 1.54μm