Metallic Nanowire Coupled CsPbBr₃ Quantum Dots Plasmonic Nanolaser

Abstract

Plasmonic nanolasers provide a valuable opportunity for expanding sub‐wavelength applications. Due to the potential of on‐chip integration, semiconductor nanowire (NW)‐based plasmonic nanolasers that support the waveguide mode attract a high level of interest. To date, perovskite quantum dots (QDs) based plasmonic lasers, especially nanolasers that support plasmonic‐waveguide mode, are still a challenge and remain unexplored. Here, metallic NW coupled CsPbBr3 QDs plasmonic‐waveguide lasers are reported. By embedding Ag NWs in QDs film, an evolution from amplified spontaneous emission with a full width at half maximum (FWHM) of 6.6 nm to localized surface plasmon resonance (LSPR) supported random lasing is observed. When the pump light is focused on a single Ag NW, a QD‐NW coupled plasmonic‐waveguide laser with a much narrower emission peak (FWHM = 0.4 nm) is realized on a single Ag NW with the uniform polyvinylpyrrolidone layer. The QDs serve as the gain medium while the Ag NW serves as a resonant cavity and propagating plasmonic lasing modes. Furthermore, by pumping two Ag NWs with different directions, a dual‐wavelength lasing switch is realized. The demonstration of metallic NW coupled QDs plasmonic nanolaser would provide an alternative approach for ultrasmall light sources as well as fundamental studies of light matter interactions.

Integration of on-chip perovskite nanocrystal laser and long-range surface plasmon polariton waveguide with etching-free process

“…In comparison to the propagation lengths of the SPPs (L ≈25 μm) reported in the literature of perovskite-nanowire lasers, the observed LRSPP mode propagation length is 6-times longer. 18,33 We also measure the waveguides prepared with different widths from 3 to 10 μm, which give an average propagation length of 157 ± 18 μm (Table S1 †).…”

A quantitative single-nanowire study on the plasmonic enhancement for the upconversion photoluminescence of rare-earth-doped nanoparticles

“…S19 †). [47][48][49] The blue-shifted LSPR resonances would couple more with the 1 D 2 to 3 F 4 and 1 G 4 to 3 H 6 transitions of Tm 3+ , resulting in a relatively higher enhancement in the blue emissions.…”

“…S19 †). [47][48][49] AgNWs with larger diameters would exhibit a scattering spectrum centered in the red region and therefore enhance the red emissions more, while AgNWs with smaller diameters would show a blue-shifted scattering spectrum and promote the green emissions with higher EFs. A clear trend in the diameter dependence of the EFs for emissions at different wavelengths could be observed when plotting the intensity ratios for the green/red emissions (i.e., I 520 /I 655 and I 540 /I 655 ) of Er@2.6/AgNW hybrids against the diameter of single AgNWs (Fig.…”

Aromatic Carboxylic Acid Ligand Management for CsPbBr3 Quantum Dot Light-Emitting Solar Cells

“…CsPbBr 3 with a wide band gap ( E g ∼2.4 eV) generates a high open-circuit voltage ( V OC ) and has great potential for application in tandem solar cells as top cells. − Moreover, CsPbBr 3 QDs overcome the problem of phase instability and exhibit narrow emission linewidth and high photoluminescence quantum yield, showing huge potential in LEDs − and lasers. − A room-temperature method was reported to synthesize CsPbBr 3 nanocrystal inks, and the corresponding solar cells were fabricated, delivering an efficiency exceeding 5% and a V OC higher than 1.5 V . However, the CsPbBr 3 nanocrystals showed poor dispersibility in hexane solvent, which seriously hindered the film uniformity and the device reproducibility.…”