Second-harmonic generation tuning by stretching arrays of GaAs nanowires

We present a wearable device with III-V nanowires in a flexible polymer, which is used for active mechanical tuning of the second-harmonic generation intensity. An array of vertical GaAs nanowires was grown with metalorganic vapour-phase epitaxy, then embedded in polydimethylsiloxane and detached fr...

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Bibliographic Details
Published in:Nanoscale 2022-06, Vol.14 (24), p.8858-8864
Main Authors: Saerens, Grégoire, Bloch, Esther, Frizyuk, Kristina, Sergaeva, Olga, Vogler-Neuling, Viola V, Semenova, Elizaveta, Lebedkina, Elizaveta, Petrov, Mihail, Grange, Rachel, Timofeeva, Maria
Format: Article
Language:English
Subjects:
Arrays
Chemistry
Epitaxial growth
Gallium arsenide
Light sources
Metalorganic chemical vapor deposition
Nanowires
Polydimethylsiloxane
Second harmonic generation
Stretching
Substrates
Tuning
Vapor phase epitaxy
Wearable technology
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Summary:We present a wearable device with III-V nanowires in a flexible polymer, which is used for active mechanical tuning of the second-harmonic generation intensity. An array of vertical GaAs nanowires was grown with metalorganic vapour-phase epitaxy, then embedded in polydimethylsiloxane and detached from the rigid substrate with mechanical peel off. Experimental results show a tunability of the second-harmonic generation intensity by a factor of two for 30% stretching which matches the simulations including the distribution of sizes. We studied the impact of different parameters on the band dispersion and tunability of the second-harmonic generation, such as the pitch, the length, and the diameter. We predict at least three orders of magnitude active mechanical tuning of the nonlinear signal intensity for nanowire arrays. The flexibility of the array together with the resonant wavelength engineering make such structures perspective platforms for future bendable or stretchable nanophotonic devices as light sources or sensors. We present a wearable device with III-V nanowires in a flexible polymer, which is used for active mechanical tuning of the second-harmonic generation intensity.
ISSN:2040-3364
2040-3372
DOI:10.1039/d2nr00641c