Hybrid Photonic Structures: Gallium Phosphide Nanowires Decorated with Carbon Dots for Enhanced Broadband Emission

Hybrid Photonic Structures: Gallium Phosphide Nanowires Decorated with Carbon Dots for Enhanced Broadband Emission

Carbon dots (CDs) are promising nanostructures in the field of photonics owing to the ease of fabrication, tunable and efficient emission. Gallium phosphide (GaP) nanowires are known for high surface area, optical density, waveguiding, resonant optical properties but lacking the luminescence due to...

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Bibliographic Details
Published in:Advanced optical materials Vol. 12; no. 21
Main Authors: Zakharov, Viktor V., Rider, Maxim A., Kovova, Mariia S., Kuznetsov, Alexey, Anikina, Maria A., Efimova, Arina A., Kondratev, Valeriy M., Shmakov, Stanislav V., Kirilenko, Demid A., Parfenov, Petеr S., Fedorov, Vladimir V., Orlova, Anna O., Bolshakov, Alexey D.
Format: Journal Article
Language:English
Published: Weinheim Wiley Subscription Services, Inc 01-07-2024
Subjects:
Broadband
Carbon dots
Decoration
Deposition
Emission
Energy gap
Excitation spectra
Fabry-Perot interferometers
gallium phosphide
Gallium phosphides
Luminescence
nanophotonics
Nanowires
nanowires;purcell effect
Optical density
Optical properties
Photoluminescence
Photonics
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Summary:Carbon dots (CDs) are promising nanostructures in the field of photonics owing to the ease of fabrication, tunable and efficient emission. Gallium phosphide (GaP) nanowires are known for high surface area, optical density, waveguiding, resonant optical properties but lacking the luminescence due to the indirect bandgap. Here, hybrid photonic structures – GaP nanowires decorated with the CDs are fabricated and studied. Feasible drop‐casting deposition technique allows fabrication of dense vertical structures exhibiting efficient photoluminescence. Deposition of the CDs over the nanowires does not affect their luminescent properties demonstrating tolerance of the approach toward the surface aggregation. Tuning of the emission spectrum is obtained via variation of the excitation wavelength and CDs’ synthesis protocol. The structures emitting throughout the visible range are obtained. Analysis of the photoluminescence of an individual structure demonstrates the most intense and fast recombination processes at the ends of a nanowire. It is shown that the luminescence of the CDs’ covering a nanowire acting as a Fabry–Perot cavity is enhanced up to a factor of 3 governed by the Purcell effect. The obtained results unveil a path for fabrication of novel photonic devices via decoration of optically dense nanowires with CDs for enhanced and directed broadband emission. Hybrid photonic structures‐GaP nanowires decorated with carbon dots (CDs) are fabricated and studied. Feasible protocol promotes efficient photoluminescence throughout the visible range. Owing to the Purcell effect, the luminescence of the CDs’ is enhanced up to a factor of 3. The results are promising for novel photonic devices exhibiting enhanced and directed broadband emission.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.202303198