Séminaire

Mardi 11 Mars 2025 à 15h00.

Inverse design of advanced nanophononic devices

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Controlling acoustic and phononic properties at the nanoscale is essential for a wide range of applications, including thermal management, mechanical resonators, and quantum technologies. Phononic crystals have emerged as the most established systems for tailoring phononic properties in advanced nanophononic devices [1]. These structures are artificially engineered superlattices that modify acoustic wave propagation, enabling precise control over their transport properties. However, their design has traditionally relied on predefined geometries and heuristic approaches guided by human intuition.
In this work, we show the experimental realization of an automated phononic crystal design methodology based on inverse design using a genetic algorithm [2, 3]. This approach takes the desired phononic properties as input and autonomously identifies an optimized structural configuration to achieve them. By moving beyond conventional, human-driven designs, it enables the discovery of novel architectures with unique acoustic properties.

References

[1] M.Diego, R.Anufriev, R.Yanagisawa and M.Nomura, Phonon dispersion of nanoscale honeycomb phononic crystal: gigahertz and terahertz spectroscopy comparison, Eur. Phys. J. Plus 139, 1032 (2024)
[2] M. Diego, M.Pirro, B.Kim, R.Anufriev and M.Nomura, Tailoring Phonon Dispersion of Genetically Designed Nanophononic Metasurface, ACS Nano 18, 28, 18307–18313 (2024)
[3] M. Diego, B.Kim, M.Pirro, S.Volz, and M.Nomura, Piezoelectrically driven diamond phononic nanocavity by phonon-matching scheme for quantum applications, Phys. Rev. Applied 21, 064064 (2024)

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