Nanophotonic Enhanced Two Photon Excited Photoluminescence of Perovskite Quantum Dots
| Autor: | Klaus Jäger, Sven Burger, Tõnu Pullerits, Christiane Becker, Pavel Chábera, Junsheng Chen, Kaibo Zheng, Carlo Barth, Phillip Manley, David Eisenhauer, Grit Köppel |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Photoluminescence Silicon Nanophotonics FOS: Physical sciences chemistry.chemical_element Physics::Optics 02 engineering and technology 010402 general chemistry 01 natural sciences Condensed Matter::Materials Science Electrical and Electronic Engineering Perovskite (structure) Silicon photonics business.industry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry all inorganic cesium lead halide perovskites quantum dot photoluminescence two photon absorption nanophotonics metasurface Quantum dot Optoelectronics Photonics 0210 nano-technology business Lasing threshold Optics (physics.optics) Biotechnology Physics - Optics |
| Popis: | All-inorganic CsPbBr3 perovskite colloidal quantum dots have recently emerged as promising material for a variety of optoelectronic applications, among others for multi-photon-pumped lasing. Nevertheless, high irradiance levels are generally required for such multi-photon processes. One strategy to enhance the multi-photon absorption is taking advantage of high local light intensities using photonic nanostructures. Here, we investigate two-photon-excited photoluminescence of CsPbBr3 perovskite quantum dots on a silicon photonic crystal slab. By systematic excitation of optical resonances using a pulsed near-infrared laser beam, we observe an enhancement of two-photon-pumped photoluminescence by more than one order of magnitude when comparing to using a bulk silicon film. Experimental and numerical analyses allow relating these findings to near-field enhancement effects on the nanostructured silicon surface. The results reveal a promising approach for significant decreasing the required irradiance levels for multi-photon processes being of advantage in applications like low-threshold lasing, biomedical imaging, lighting and solar energy. |
| Databáze: | OpenAIRE |
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