Roman Anufriev

Roman Anufriev

Project Associate Professor

The University of Tokyo

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. Next, I’ve been working in Nomura group on phononic crystals, and currently, I am a project associate professor at the University of Tokyo. 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.

Interests

  • Ballistic thermal transport
  • Nanoscale heat conduction
  • Phononic crystals
  • Thermoelectrics
  • Nanowires

Education

  • PhD in semiconductor optics at INSA-Lyon, 2013
  • MS in nanotechnology at St. Petersburg Academic University, 2010
  • BS in technical physics at St. Petersburg Politechnical University, 2008

Research

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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.

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

Parabolic mirrors collimating and focusing fluxes of thermal phonons

We demonstrate that parabolic surfaces can act as parabolic mirrors for phonons, thus collimating or focusing phonon fluxes in semiconductors.
Dhanishtha Singh, Roman Anufriev, Masahiro Nomura
Applied Physics Letters 122, 092203 (2023).
Project DOI

Impact of nanopillars on phonon dispersion and thermal conductivity of silicon membranes

We report on the fabrication and thermal measurements of silicon films with nanopillars as small as 12 nm in diameter.
Roman Anufriev, Daisuke Ohori, Yunhui Wu, Yanagisawa Ryoto, Jalabert Laurent, Samukawa, Seiji, Masahiro Nomura
Nanoscale 15, 2248 (2023).
Project DOI

In-plane surface phonon-polariton thermal conduction in dielectric multilayer systems

We find that SPhPs generated in SiO2 nanolayers couple with guided resonant modes and propagate mainly in the nonabsorbent Si layer for microscale Si thicknesses.
Saeko Tachikawa, Jose Ordonez-Miranda, Yunhui Wu, Laurent Jalabert, Roman Anufriev, Sebastian Volz, Masahiro Nomura
Applied Physics Letters 121, 202202 (2022).
DOI

Observation of heat transport mediated by the propagation distance of surface phonon-polaritons over hundreds of micrometers

We show that thin nanomembranes support heat transport by SPhPs, as evidenced by an increase in the thermal conductivity with temperature.
Yunhui Wu, Jose Ordonez-Miranda, Laurent Jalabert, Saeko Tachikawa, Roman Anufriev, H Fujita, Sebastian Volz, Masahiro Nomura
Applied Physics Letters 121, 112203 (2022).
DOI

Net heat current at zero mean temperature gradient

The existence of a net heat current of conductive thermal waves is demonstrated even in the absence of a mean temperature gradient.
Jose Ordonez-Miranda, Roman Anufriev, Masahiro Nomura, Sebastian Volz
Physical Review B 106, L100102 (2022).
DOI
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