期刊
NANO LETTERS
卷 18, 期 9, 页码 5522-5529出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b01912
关键词
Fano resonance; halide perovskites; excitons; nanophotonics; Mie resonances
类别
资金
- Ministry of Education and Science of the Russian Federation [16.8939.2017/8.9]
- Russian Science Foundation [17-73-20336]
- Knut and Alice Wallenberg Foundation
- European Social Fund [09.3.3-LMT-K-712-01-0031]
- Australian National University
- Welch Foundation [AT 16-17]
- Russian Science Foundation [17-73-20336] Funding Source: Russian Science Foundation
Halide perovskites are known to support excitons at room temperatures with high quantum yield of luminescence that make them attractive for all-dielectric resonant nanophotonics and meta-optics. Here we report the observation of broadly tunable Fano resonances in halide perovskite nanoparticles originating from the coupling of excitons to the Mie resonances excited in the nanoparticles. Signatures of the photon-exciton (hybrid) Fano resonances are observed in dark-field spectra of isolated nanoparticles, and also in the extinction spectra of aperiodic lattices of such nanoparticles. In the latter case, chemical tunability of the exciton resonance allows reversible tuning of the Fano resonance across the 100 nm bandwidth in the visible frequency range, providing a novel approach to control optical properties of perovskite nanostructures. The proposed method of chemical tuning paves the way to an efficient control of emission properties of on-chip-integrated light-emitting nanoantennas.
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