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Labs ■ Nanophotonics

Nanophotonics

The Nanophotonics lab focuses on the different aspects of light absorption, emission, and modulation via colloidal nanocrystals. Highly luminescent nanocrystals are investigated via time-resolved fluoresence spectroscopy, in the nanosecond and picosecond time domain. Nonlinear optical properties are measured using the Z-scan technique, and two-photon induced fluorescence excitation spectroscopy. Finally, phototransport studies can be conducted, in collaboration with the nanostructures department, with the goal of selecting the most suitable nanomaterials for integration into prototypic photovoltaic cells.

For these purposes, the optical spectroscopy lab is equiped with a spectrofluorometer, measuring the nanosecond time-resolved photoluminescence in the visible and near-infrared spectral range. Faster picosecond dynamics are measured with a streak camera. Samples can be excited over a wide range of wavelengths, using CW light, a femtosecond TiSa laser (80MHz), or a kHz amplifier coupled to an OPA. The nonlinear properties can be measured using both the femtosecond laser sources, or a nanosecond Nd:YAG laser coupled to an OPO.

The solar lab contains gloveboxes with a spincoater and a thermal evaporation system to fabricate the solar cells. Sputtering of metal electrodes, and optical lithography are performed in the clean room (nanostructures facility). Next to standard I-V measurements, a solar simulator enables the characterization of the device efficiency under AM1.5 conditions.

Last Updated on Friday, 11 January 2013 16:28

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