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Lassailly Yves

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Groupe Electrons Photons Surfaces

+33 (0)1 69 33 46 75

Since the last ten years I have worked on different topics :

Electron Spin Filtering effect of a spin-polarized electron beam through ultra-thin magnetic layer and the optical detection of ballistic electrons and of the spin polarization. The experiments aim at understanding the spin dependent transport when spin polarized electrons are injected from vacuum into a structure associating semi-conductor and ferromagnetic layer on top (such as Fe on GaAs). (see I. Favorskiy PhD thesis 2013, X.Li PhD Thesis 2011)
Optical detection of spin-filter effect for electron spin polarimetry
Appl. Phys. Lett. 105, 052402 (2014) ;
X. Li, O. E. Tereshchenko, S. Majee, G. Lampel, Y. Lassailly, D. Paget, and J. Peretti

Matter Migration phenomena induced by light by harnessing the photomechanical effects associated with the structural changes of the azobenzene molecule. The objective is to demonstrate the ability to control optically the movement of molecules incorporated into organic and organic-mineral matrices. It leads to sub-wavelenght inscription of artificial structures and the fabrication of optically tunable 2D arrays of photoactive metal/dielectric structures. (see F. Fabbri PhD thesis- 2009, Anh‐Duc Vu PhD thesis 2015)
Optical Patterning of Sol–Gel Silica Coatings
N. Desbœufs, Anh‐Duc Vu, K.Lahlil,Y. Lassailly, L. Martinelli, J‐P.Boilot, J. Peretti,T. Gacoin,
Adv. Optical Materials, (2016), 4, 313-323,

Low energy cathodoluminescence in GaN based structures under local tunneling electron by a STM tip : the goal is to achieve a spatially resolved mapping of the luminescence using InGaN quantum wells (QW’s) buried at different depths of the surface as an optically active region. Spatial localization of the luminescence correlated to In fluctuations in QW’ layers is evidenced at the scale of 5 nm. Such results lead to develop a quantum model of carrier distribution (localization landscape) and transport in disordered materials. (see P Podovodov, PhD. Thesis 2015)

Evidence of nanoscale Anderson localization induced by intrinsic compositional disorder in InGaN/GaN quantum wells by scanning tunneling luminescence spectroscopy
W. Hahn, J.-M. Lentali, P. Polovodov, N. Young, S. Nakamura, J. S. Speck, C. Weisbuch, M. Filoche, Y.-R. Wu, M. Piccardo, F. Maroun, L. Martinelli, Y. Lassailly, and J. Peretti, Phys. Rev. B 98, 045305 (2018)

Magneto-optic detection limits for semiconductor materials : the ability to measure ultra sensitive light polarization rotations in the photon shot noise limit is investigated for 3 experimental approaches : partially crossed polarizers, a Sagnac interferometer and an optical optical. The superior performance of the bridge is demonstrated by measuring a 3 nrad rotation in a ferromagnetic material. Photo-induced Faraday rotation due to spin-polarized electrons has been measured in doped GaAs using a pump-probe experiment. (see I. Zhaksylykova PhD thesis 2018)

Polarizers, optical bridges, and Sagnac interferometers for nanoradian polarization rotation measurements, Review of Scientific Instruments 88, 043903 (2017), A. C. H. Rowe, I. Zhaksylykova, G. Dilasser, Y. Lassailly, and J. Peretti,

Spin resolved studies of chiral surfaces : the study of chiral surface allows to demonstrate the effect of chirality on the electron spin. The Si(110)-16x2 surface is a chiral reconstruction that is prepared as a single domain of only one enantiomer. Spin and angle-resolved photoemission shows localized surface states whose spin polarization components are non zero and are opposite in sign between enantiomorphs. The next step is to explore signature of chirality in metallic systems.

Domain formation mechanism of the Si(110) “16×2” reconstruction, N. K. Lewis, N. B. Clayburn, E. Brunkow, T. J. Gay, Y. Lassailly, J. Fujii, I. Vobornik, W. R. Flavell, and E. A. Seddon, Phys. Rev. B 95, 205306 – (2017)