[15p-K501-1~12] 22.1 Joint Session M "Phonon Engineering"

1:00 PM - 1:15 PM JST(4:00 AM - 4:15 AM UTC)English Presentation

[15p-K501-1] [The 57th Young Scientist Presentation Award Speech] Designing advanced nanophononic devices through genetic algorithm

〇Michele Diego¹, Matteo Pirro¹, Byunggi Kim¹, Roman Anufriev¹, Masahiro Nomura¹ (1.Institute of Industrial Science, The University of Tokyo)

Keywords:

Nanophononics,Genetic algorithm,Phonon Engineering

Controlling acoustic/phononic properties at the nanoscale is essential for various applications, ranging from thermal transport to mechanical resonators and quantum technologies. Phononic crystals have become the most established class of structures for engineering and tailoring phononic properties in advanced nanophononic devices [1]. However, their design typically relies on conventional shapes and simple guidelines based on human intuition. Here, we first present the experimental realization of an automated approach to designing phononic crystals through an inverse design method based on a genetic algorithm [2]. With this method, the desired phononic properties are input into the algorithm, which automatically finds the optimal structural design to meet these specific requirements. By moving beyond traditional, human-made designs, this approach can find novel structures with unique properties. Then, we demonstrate how inverse design can be applied to more complex devices, such as one-dimensional hybrid diamond-piezoelectric phononic cavities [3]. In this context, the goal is to enhance the device efficiency in exciting localized acoustic resonant modes, which can be used to control transitions in qubits based on diamond color centers.
[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)