Roman Anufriev

CNRS researcher

Biography

I graduated from the Nanotechnology faculty of St. Petersburg Academic University and moved to France, where I did my Ph.D. on optics of semiconductor nanowires at INSA-Lyon. Since 2014, I have been working on thermal physics, first as a postdoc in Nomura group and later project associate professor at the University of Tokyo. Presently, I work as a CNRS researcher at CETHIL. My research is focused on phonon and heat transport in nanostructures. Specifically, I study ballistic thermal conduction in nanowires and phononic crystals for applications in thermoelectrics and microelectronics.

Projects

Ballistic heat

Investigation of ballistic conduction of phonons and heat in semiconductors at nanoscale.

Thermoelectrics

Improving the thermoelectric performance of silicon-based devices using nanofabrication.

Polaritonics

Theoretical and experimental studies of surface phonon-polaritons

Ray phononics

In this project, I develop a new concept of heat manipulation based on particle properties of phonons"

Wave phononics

Theoretical and experimental studies of coherent heat conduction in phononic crystals.

Nanowire optics

My PhD project about optical properties of quantum dots is nanowires.

Publications

Tailoring phonon dispersion of a genetically designed nanophononic metasurface

Using the inverse design approach, we create a two-dimensional phononic metasurface exhibiting a highly anisotropic phonon dispersion.

Michele Diego, Matteo Pirro, Byunggi Kim, Roman Anufriev, Masahiro Nomura

ACS Nano XX, XXXXX (2024).

Project Link

Harnessing thermal waves for heat pumping

Based on the nonlinear propagation of thermal diffusion waves, we demonstrate the existence of a net heat current even in the absence of a mean temperature gradient.

Jose Ordonez-Miranda, Roman Anufriev, Volz Sebastian, Masahiro Nomura

Physical Review Applied 21, 054037 (2024).

Link

Anisotropy Reversal of Thermal Conductivity in Silicon Nanowire Networks Driven by Quasi-Ballistic Phonon Transport

Inspired by an oriental wave pattern, we investigate anisotropic in-plane thermal conduction in nanoscale silicon phononic crystals with the thermally dead volume.

Byunggi Kim, Félix Barbier-Chebbah, Yohei Ogawara, Laurent Jalabert, Ryoto Yanagisawa, Roman Anufriev, Masahiro Nomura

ACS Nano 18, 15, 10557–10565 (2024).

Project Link

Enhanced Far-Field Thermal Radiation through a Polaritonic Waveguide

We experimentally demonstrate the enhancement of the far-field thermal radiation between two nonabsorbent Si microplates coated with energy-absorbent SiO2 nanolayers

Saeko Tachikawa, Jose Ordonez-Miranda, Laurent Jalabert, Yunhui Wu, Roman Anufriev, Yangyu Guo, Byunggi Kim, Hiroyuki Fujita, Sebastian Volz, Masahiro Nomura

Physical Review Letters 132, 186904 (2024).

Project Link

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