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Enhanced Photoluminescence of Halide Perovskite Nanocrystals Mediated by a Higher-Order Topological Metasurface
Enhanced Photoluminescence of Halide Perovskite Nanocrystals Mediated by a Higher-Order Topological Metasurface
- Source :
- The Journal of Physical Chemistry - Part C; May 2021, Vol. 125 Issue: 18 p9884-9890, 7p
- Publication Year :
- 2021
-
Abstract
- Halide perovskite nanocrystals are a family of nanomaterials with a high prospect for use in light-emitting devices, lasers, and quantum optics, which makes their integration into photonic circuits highly desirable. On the other hand, recently discovered higher-order topological insulators offer rich potential for disorder-robust light confinement due to topological protection over an extended range of dimensionalities. Here, we demonstrate coupling of halide perovskite nanocrystals to higher-order zero-dimensional states confined to the corners of a topological metasurface. Namely, we integrate a silicon-based kagome lattice supporting various topologically protected states with a layer of perovskite nanocrystals with the emission wavelength precisely tuned to the required wavelength via anion exchange reaction. By measuring the photoluminescence spectra of perovskite nanocrystals, we reveal a significant enhancement at the frequency of zero-dimensional topological corner states, thus highlighting the interplay of topological physics and the Purcell effect. We further support our findings by the time-resolved photoluminescence measurements.
Details
- Language :
- English
- ISSN :
- 19327447 and 19327455
- Volume :
- 125
- Issue :
- 18
- Database :
- Supplemental Index
- Journal :
- The Journal of Physical Chemistry - Part C
- Publication Type :
- Periodical
- Accession number :
- ejs55983012
- Full Text :
- https://doi.org/10.1021/acs.jpcc.1c01492