| Autor: |
Becker, Christiane, Burger, Sven, Barth, Carlo, Manley, Phillip, Jäger, Klaus, Eisenhauer, David, Köppel, Grit, Chabera, Pavel, Chen, Junsheng, Zheng, Kaibo, Pullerits, Tönu |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
ACS Photonics 5, 4668 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1021/acsphotonics.8b01199 |
| 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: |
arXiv |
| Externí odkaz: |
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