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

Phonon dispersion of nanoscale honeycomb phononic crystal: gigahertz and terahertz spectroscopy comparison

In this work, we experimentally investigate the behavior of a honeycomb silicon phononic crystal in the gigahertz range, where the continuum approximation holds, and in the terahertz range, where the phonon wavelengths are comparable to interatomic distances.

Michele Diego, Roman Anufriev, Ryoto Yanagisawa, Masahiro Nomura

The European Physical Journal Plus Plus 139, 1032 (2024).

Project Link

A graphite thermal Tesla valve driven by hydrodynamic phonon transport

We demonstrate the rectification of heat conduction using micrometre-scale Tesla valve with the difference in thermal conductivity between opposite directions at 45 K.

Xin Huang, Roman Anufriev, Laurent Jalabert, Kenji Watanabe, Taniguchi Takashi, Yangyu Guo, Yuxiang Ni, Sebastian Volz, Masahiro Nomura

Nature 634, 1086 (2024).

Project Link

Dimensional crossover in thermal radiation: From three-to two-dimensional heat transfer between metallic membranes

We reveal a dimensional crossover in far-field thermal radiation between subwavelength gold membranes.

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

Physical Review Applied 22, L031006 (2024).

Link

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 18, 18307 (2024).

Project Link

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