Yann DESMET

Laboratoire IEMN – UMR 8520
Avenue Henry Poincare’
59652 VILLENEUVE D’ASCQ
+33 (0)3 28 65 78 65
yann.desmet@iemn.univ-lille1.fr

– Thesis title Non-linearity study of resonant cavity photoconductive switches for optoelectronic direct subsampling of microwave signals.

– Thesis starting date. 01 June 2014

– Thesis topic. I currently work on photoconductors for the under-sampling of high frequency signals. A novel resonant cavity photoconductor that optimises the optical absorption inside a low temperature grown-GaAs layer has been developed at IEMN. Controlled by a mode-locked femtosecond laser these photoconductors allow overcoming the time-jitter limitation of electronic clocks. At such low levels of jitter the main limitation becomes the dynamic reduction due to the harmonic generation induced by the photoconductor non-linearity. My work is focused on the non-linear modelisation of the photoconductor in order to propose a new topology to reduce harmonic generation.

– Publications

[1] E. Peytavit, M. Billet, Y. Desmet, G. Ducournau, D. Yarekha, and J-F. Lampin, “THz photomixers based on nitrogen-ion-implanted GaAs,” Journal of Applied Physics 118, 183102 (2015); doi: doi.org/10.1063/1.4935520

– Conference proceedings:

[1] Y. Desmet et al., “Room temperature platinum nano-strip bolometer for mm & submm-wave applications,” 2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre Wave Technology and Applications, Espoo, 2016, pp. 1-4. doi: 10.1109/GSMM.2016.7500290

[2] E. Peytavit, M. Billet, Y. Desmet, G. Ducournau, D. Yarekha and J. F. Lampin, “Nitrogen-ion-implanted GaAs Fabry-Pérot cavity photoconductor for THz photonics,” 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Hong Kong, 2015, pp. 1-2. doi: 10.1109/IRMMW-THz.2015.7327720

[3] Y. Desmet, E. Peytavit, L. Menager, S. Formont and J. F. Lampin, “Photoconducteur à cavité résonnante pour l’échantillonnage optoélectronique de signaux hyperfréquences”,15èmes Journées Nano, Micro et Optoélectronique, JNMO 2016, Les Issambres, France, 30 Mai-1 June, 2016

[4] Y. Desmet, E. Peytavit, L. Menager, S. Formont and J. F. Lampin, “Photoconducteur à cavité résonante pour l’échantillonnage optoélectronique de signaux hyperfréquences,” Actes des 19èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2016, Toulouse, France, 11-13 Mai, 2016, paper 10.1.2