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Spectroscopy of PbS quantum dots on Si photonic crystal cavities with a fiber taper waveguide
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View: Figures


Image of FIG. 1.
FIG. 1.

[(a)–(c)] SEM images of the H1, L3, and MH cavities, respectively. The lattice constants in (c) are . [(d)–(f)] Transmission spectrum of the H1, L3, and MH cavities before QD spin with fits (dashed). (d) and (f) were taken with the taper in contact with the cavity, while (e) was taken with the taper above the cavity. [(g)–(i)] Same as [(d)–(f)] but after QD spin. Inset of (g) SEM image of QDs in a area.

Image of FIG. 2.
FIG. 2.

Fiber-collected PL spectra for (a) H1, (b) L3, and [(c)–(d)] MH PCCs. Inset of (a) Room-temperature PL of an ensemble of QDs without cavity. Inset of (b) L3 transmission with taper in contact with cavity.

Image of FIG. 3.
FIG. 3.

(a) Continuous measurement of PL on an SPCM while the excitation is intermittently turned off and on. (b) Close-up of one of the photodarkening curves taken in (a) along with fit (dashed). [(c) and (d)] PL saturation measurements of the modes at 1522.7 and 1532.1 nm in the MH cavity with fits (dashed).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spectroscopy of 1.55μm PbS quantum dots on Si photonic crystal cavities with a fiber taper waveguide