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Efficient light trapping in ultrathin silicon solar cells
Ultrathin c-Si solar cells have the potential to drastically reduce costs by saving raw material, while maintaining good efficiencies thanks to the excellent quality of monocrystalline silicon. However, efficient light trapping strategies must be implemented to achieve high short-circuit …
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Exchange interaction-driven dynamic nuclear polarization in Mn-doped InGaAs/GaAs quantum dots
The optical spin orientation and subsequent dynamic nuclear polarization (DNP) in individual self-assembled InGaAs/GaAs quantum dots doped by a single Mn atom is shown to be strongly perturbed by the exchange interaction between a photo-created electron and the spin …
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Flexible nitride nanowires light emitting diodes
Presently, flexible light sources mainly use organic materials integrated on lightweight and flexible plastic substrates. However, organic LEDs present a much lower luminance and a shorter lifetime in comparison to the LEDs based on inorganic nitride semiconductors. The inorganic …
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Controlling carbon nanotube photoluminescence using silicon microring resonators
By depositing carbon nanotubes on ring-shaped micro-resonators, researchers at C2N (CNRS / Université Paris-Sud) managed to control the light emitted by the nanotubes. This technology could be optimized for future applications in optical telecommunications or …
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Coherent control of an artificial atom with few photons
In an optical quantum network, the information is transferred from one node to an other through light. A possible building block for such quantum network is an atom in a cavity. Ideally, every photon sent on the node should …
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