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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

Authors :
Berestennikov, Alexander S.
Vakulenko, Anton
Kiriushechkina, Svetlana
Li, Mengyao
Li, Yanxiu
Zelenkov, Lev E.
Pushkarev, Anatoly P.
Gorlach, Maxim A.
Rogach, Andrey L.
Makarov, Sergey V.
Khanikaev, Alexander B.
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