I'm a Ph.D. student (in the field of quantum chemistry, more specifically nonlinear optics) and teaching assistant in the laboratory of Professor Benoît Champagne, in the University of Namur (in Belgium) where I also obtained a bachelor in Computer Science. During my free times, I like to shoot photos, read, code, bike, or enjoy a beer with my friends ;)
Dynamical nonlinear optical systems: a multiscale theoretical chemistry investigation.
My Ph.D. thesis focuses on the evaluation of the nonlinear optical response of molecules or systems in gas or condensed phase. It includes computations at the Hartree-Fock, DFT or Coupled Cluster levels for the evaluation of the different contributions. The theoretical works is carried out in close collaboration with experimental characterizations, through our collaborators or the literature.
L. Lescos, S. P. Sitkiewicz, P. Beaujean, M. Blanchard-Desce, B. Champagne, E. Matito and F. Castet. "Performance of DFT functionals for calculating the second-order nonlinear optical properties of dipolar merocyanines". Phys. Chem. Chem. Phys. 22, 16579 (2020). 10.1039/D0CP02992K.
P. Beaujean and B. Champagne. "Coupled cluster investigation of the vibrational and electronic second and third harmonic scattering hyperpolarizabilities of the water molecule". J. Chem. Phys. 151, 064303 (2019). 10.1063/1.5110375.
P. Beaujean and B. Champagne. "Coupled cluster evaluation of the second and third harmonic scattering responses of small molecules". Theo. Chem. Acc. 137, 50 (2018). 10.1007/s00214-018-2219-y.
B. Champagne, P. Beaujean, M. de Wergifosse, M. H. Cardenuto, V. Liégeois and F. Castet. "Quantum Chemical Methods for Predicting and Interpreting Second-Order Nonlinear Optical Properties: From Small to Extended π-Conjugated Molecules". Frontiers of Quantum Chemistry 6, 117 (2018). 10.1007/978-981-10-5651-2_6.
P. Beaujean and B. Champagne. "Coupled cluster evaluation of the frequency dispersion of the first and second hyperpolarizabilities of water, methanol, and dimethyl ether". J. Chem. Phys. 145, 044311 (2016). 10.1063/1.4958736.
P. Beaujean, F. Bondu, A. Plaquet, J. Garcia-Amoros, J. Cusido, F.M. Raymo, F. Castet, V. Rodriguez and B. Champagne. "Oxazines: A New Class Of Second-Order Nonlinear Optical Switches". J. Am. Chem. Soc. 138, 5052 (2016). 10.1021/jacs.5b13243.
P. Beaujean and M. Kertesz. "Helical molecular redox actuators with pancake bonds?". Theo. Chem. Acc. 134, 147 (2015). 10.1007/s00214-015-1750-3.
Used for the study (prediction and analysis) of molecular properties, through TDHF, TDDFT or response functions.
HTML and CSS
Most of my codes are written in python 3, with the scipy stack.
Comfortable with oral and writing communications in French (native) and English.
Excellent knowledge in quantum, physical, biological, inorganic, and organic chemistry. Good knowledge in mathematics, group theory, physics and biology.
Good knowledge in UNIX-like operating systems (Linux and Mac OS), experiences using Microsoft Windows.
Teaching assistant (2015 to today): exercises and practical sessions in general chemistry (first year of science), mathematics (second year of chemistry, in differential equations, linear algebra and group theory) and quantum chemistry (third and fourth year of chemistry, practical sessions with GAMESS).
Computer programing (2011 to today): development of many codes to extract and interpret data from calculation results, written during my master and Ph.D. thesis. Since 2014, regular contributions to the code of Zeste de Savoir, a knowledge-sharing platform written in Python. In September 2017, I started a bachelor in computer science in evening classes to improve my skills. I got it, with honnors, in June 2020.
Private school coach (2011-2015): school coach in chemistry, biology, physics and mathematics.
Scout and summer camp leadership (2008-2014): own a diploma of child animation capacity (BACV) obtained in 2011.
Getting my Bachelor's Degree in Computer Science, with honnors (University of Namur, Belgium)
15 minutes talk at the EUCO 2019 on Evaluating the electronic and vibrational contributions to second and third harmonic scattering responses (Perugia, Italy)
15 minutes talk at the Namur Institute of Structural Matter (NISM) first annual meeting on Prediction and Analysis of the Electronic and Vibrational Contributions to the Second and Third Harmonic Scattering Responses Using Ab Initio Methods (Namur, Belgium).
1 week scientific trip in the laboratory of our collaborator, Lionel Sanguinet (researcher in Moltech Anjou), to confront theoretical and experimental results on different systems (University of Angers, France).
15 minutes talk at the METAMORPHOSE (doctoral school) scientific day on Coupled cluster evaluation of the second and third harmonic scattering responses of small molecules (UCL, Belgique).
Presentation of a poster entitled Coupled cluster evaluation of the second and third harmonic scattering responses of small molecules at the Quantum Chemistry in Belgium (QCB) 13 symposium.
Starting a Bachelor in Computer Science (evening classes) in the University of Namur in parallel with my Ph.D. thesis.
15 minutes talk at the CTTC VII (Current Trends in Theoretical Chemistry VII) on Coupled cluster evaluation of the frequency dispersion of the first and second hyperpolarizabilities of water, methanol, and dimethyl ether (Krakow, Poland).
Starting my PhD thesis (in 6 years) in the Laboratory of Theoretical Chemistry (LCT), under the supervision of Professor B. Champagne (University of Namur, Belgium), together with a position of teaching assistant.
Getting my Master's Degree in Chemistry (University of Namur, Belgium), obtained with Distinction.
3 months internship in the laboratory of Professor M. Kertesz (Georgetown University, USA), on Helical molecular actuators with pancake bonds.
Presenting my Master's Thesis in quantum chemistry, made in the Laboratory of Theoretical Chemistry (LCT) under the supervision of Professor B. Champagne and Doctor A. Plaquet (University of Namur, Belgium) on Characterization of the second-order nonlinear optical properties of oxazine molecular switches by quantum chemistry calculation and hyper-Rayleigh scattering spectroscopy.
2 weeks internship in the laboratory of Professor V. Rodriguez for the characterization of nonlinear optical (NLO) properties of some compounds from the oxazine family (University of Bordeaux I, France).