[institut] Photonics Center Seminar: Jose Ordonez-Miranda, Monday, 05th November, 11:00

[Dr. Dragan D. Markushev]

Dear colleagues,

you are cordially invited to the Photonics Center seminar of the 
Laboratory for Photoacoustics, which will be held on Monday, 05th 
November 2018 at 11:00 in the library reading room "Dr. Dragan Popović" 
of the Institute of Physics Belgrade. The talk entitled

                               "Thermotronics: Thermal Diode and Thermal 
Transistor"

will be given by Dr. Jose Ordonez-Miranda from the Institut Pprime, 
CNRS, Université de Poitiers, ISAE-ENSMA, F-86962 Futuroscope, 
Chasseneuil, France (https://www.pprime.fr/?q=en).
The abstract of the talk is provided below.

Guidance, amplification and rectification of electric and thermal 
currents are of fundamental importance
for the efficient use of the energy resources of nature. In electricity, 
this has been achieved with diodes
and transistors, which have revolutionized our daily lives with their 
applications in almost all modern
electronic devices. Inspired by the capabilities of these essential 
electronic components, in recent years
many researchers have made great efforts to develop their thermal 
analogs, which are analysed in this
presentation.
The purpose of this talk is to present our latest results on the 
optimization of the rectification and
amplification factors of a thermal diode and thermal transistor 
operating with a
VO2 terminal, respectively. This phase-change material is very promising 
to control heat currents, due
to its transition from its insulating phase, at low temperature (T < 
68°C), to its metallic one, at high
temperature (T > 73°C); which induces significant changes in its thermal 
and optical properties,
within a relatively short interval of temperatures close to room 
temperature. Applying the principle
of energy conservation, we derive and analyse analytical expressions for 
the heat currents and the
rectification and amplification factors that characterize the operation 
of both thermal devices. The
thermal hysteresis of VO2 is used to maximize the rectification factor 
(amplification) of the thermal
diode (transistor) to values greater than 20 (100) and to generate a 
significant heating or cooling of the
VO2 terminal. This "thermal jump" effect can be efficiently applied to 
control the thermal currents inside
the thermal diode and transistor, which could, in turn, be used as 
thermal machines for heating and
cooling, as we do with microwave oven and freezers at home.

Selected publications:

[1] Jose Ordonez-Miranda, Younès Ezzahri, Karl Joulain, Jérémie 
Drevillon, JJ Alvarado-Gil
Modeling of the electrical conductivity, thermal conductivity, and 
specific heat capacity of VO 2
Physical Review B, 98(7), 075144, (2018) 
https://doi.org/10.1103/PhysRevB.98.075144
[2] Jose Ordonez-Miranda, James M Hill, Karl Joulain, Younès Ezzahri, 
Jérémie Drevillon
Conductive thermal diode based on the thermal hysteresis of VO2 and 
nitinol
Journal of Applied Physics, 123 (8), 085102 (2018); doi: 
10.1063/1.5019854
[3] Jose Ordonez-Miranda, Younes Ezzahri, Karl Joulain
Quantum thermal diode based on two interacting spinlike systems under 
different excitations
Physical Review E, 95, 022128 (2017); 
https://doi.org/10.1103/PhysRevE.95.022128
[4] Karl Joulain, Jérémie Drevillon, Younès Ezzahri, and Jose 
Ordonez-Miranda
Quantum Thermal Transistor
Phys. Rev. Lett. 116, 200601 – 2016, 
https://doi.org/10.1103/PhysRevLett.116.200601
[5] Volz, S., Ordonez-Miranda, J., Shchepetov, A. et al.
Nanophononics: state of the art and perspectives
Eur. Phys. J. B (2016) 89: 15. 
https://doi.org/10.1140/epjb/e2015-60727-7
[6] Jose Ordonez-Miranda, Juan Jose Alvarado-Gil
On the stability of the exact solutions of the dual-phase lagging model 
of heat conduction
Nanoscale research letters, 6(1), 321, (2011) doi: 
10.1186/1556-276X-6-327
[7] Dragan Markushev, J Ordonez-Miranda, S Rabasović, S Galovic, M. 
Todorovic, et al..
Effect of the absorption coefficient of aluminium plates on their 
thermoelastic bending in photoacoustic experiments
Journal of Applied Physics, American Institute of Physics, 2015, 117 
(24), pp.245309; https://doi.org/10.1063/1.4922718
[8] Markushev, D.D., Ordonez-Miranda, J., Rabasović, M.D. et al.
Thermal and elastic characterization of glassy carbon thin films by 
photoacoustic measurements
Eur. Phys. J. Plus (2017) 132: 33. 
https://doi.org/10.1140/epjp/i2017-11307-2

Best regards,
Dr. Dragan D. MARKUSHEV

-- 
Dr. Dragan D. MARKUSHEV
Principal Research Fellow
Photonics Center
Head of Laboratory for Photoacoustics
Institute of Physics Belgrade
Pregrevica 118,
11080 Belgrade, SERBIA
cell: +381603169816
phone: +381113713158
fax: +381113162190
http://photonics.ipb.ac.rs/
http://www.ipb.ac.rs/