Le professeur Gabriel Popescu, de l’Université de l’Illinois à Urbana-Champaign (USA), donnera un séminaire intitulé « Quantitative phase imagining (QPI) for materials and life sciences applications » le Vendredi 11 Avril 2014 à 11h dans la salle de conférences XLIM, sur le site de La Borie à Limoges. Ce séminaire s’inscrit dans le cadre du LABEX Sigma-Lim, et est ouvert au plus grand nombre.

Nous vous attendons nombreux !

Abstract

Quantitative phase imaging (QPI), in which optical pathlength shifts introduced by the sample of interest are measured at each point in the field of view, has undergone rapid development especially in the past decade. The nanoscale sensitivity to pathlength changes achieved in QPI allows new applications both in materials and life sciences. I will discuss the principles of the main QPI methods used in our laboratory: diffraction phase microscopy and spatial light interference microscopy. I will review our recent results in materials science: nanoscale topography, wafer inspection, dynamic topography in wet etching monitoring, photochemical etching. On life sciences applications I will discuss some of our results on label free imaging of cells and tissues: cell growth, cell tomography, and differentiation of stem cells.

Biography of the author

Gabriel Popescu is an Associate Professor in Electrical and Computer Engineering, University of Illinois at Urbana-Champaign. He received the B.S. and M.S. in Physics from University of Bucharest, in 1995 and 1996, respectively, obtained his M.S. in Optics in 1999 and the Ph.D. in Optics in 2002 from the School of Optics/ CREOL (now the College of Optics and Photonics), University of Central Florida.  Dr. Popescu continued his training with the G. R. Harrison Spectroscopy Laboratory at M.I.T., working as a postdoctoral associate. He joined Illinois in August 2007 where he directs the Quantitative Light Imaging Laboratory (QLI Lab) at the Beckman Institute for Advanced Science and Technology. Prof. Popescu received the 2009 NSF CAREER Award, was the 2012 Innovation Discovery Finalist selected by the Office of Technology Management Office, UIUC, was elected as the 2012-2013 Fellow of the Center for Advanced Studies at UIUC, and a 2014 finalist in the New Venture Competition with Phi Optics, Inc., at UIUC. Dr. Popescu is an Associate Editor of Optics Express and Biomedical Optics Express, and Editorial Board Member for Journal of Biomedical Optics. He is an OSA Senior Member and SPIE Fellow. Over the past decade, Dr. Popescu has been working mainly on quantitative phase imaging of cells and tissues. He authored a book on this subject, edited another book on NanoBiophotonics, authored 100 journal publications, 120 conference presentations, 24 patents, gave 110 invited talks. Dr. Popescu founded Phi Optics, Inc., a start-up company that commercializes quantitative phase imaging technology.

Contact XLIM du séminaire : Aurélian Crunteanu (aurelian.crunteanu@xlim.fr)