Figure 1 | Light: Science & Applications

Figure 1

From: Rapid and robust control of single quantum dots

Figure 1

Schematic of the experiment. Laser pulses from a broadband femtosecond laser induce two-photon absorption in rod-shaped CdSe/CdS quantum dots, after passing through a phase-only pulse shaper. TPPL signal collected using an oil-immersion objective is spectrally filtered and sent to a single photon avalanche photodiode (APD). For each optimization step, the multiple one-dimensional search optimization algorithm searches for the spectral phase on the spatial light modulator pixels that maximizes the TPPL signal using it as feedback variable.

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