Paweł Kowalczyk, Prof.
Molecular Spectroscopy and Ultracold Quantum Gases Laboratory (QGL)
Paweł Kowalczyk, Prof.
Molecular Spectroscopy and Ultracold Quantum Gases Laboratory (QGL)
Bio
Prof. dr hab. Paweł Kowalczyk is employed as a professor at the Faculty of Physics of the University of Warsaw. His research is concentrated around laser spectroscopy of diatomic molecules. After several scholarships in Germany, Canada and France he initiated experimental studies of molecular spectra in Warsaw, employing an original method of polarization labelling spectroscopy and specializing in spectroscopy of alkali metal dimers. During thirty years of intensive research he studied more than 90 electronic states of these molecules. In recent years he concentrates his research on such states which are important in processes of formation of ultracold molecules from laser cooled atoms, being a hot topic in contemporary experimental physics. At the same time he develops methods of description of observed molecular states, in particular the method of pointwise Inverted Perturbation Approach. At present this is the only method allowing to construct potential energy curves of „exotic” shapes common among excited electronic states (potentials with double minima, internal barriers etc.) and as such it is employed by many research groups in the world. Professor Kowalczyk was a deputy director of the Institute of Experimental Physics in the years 2008-2016 and from 2016 is the director of the Institute.
Papers
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2023 J. Phys. Chem. A 127
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2021 Spectrochimica Acta A255, 119643
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2020 Spectrochimica Acta A224, 117331
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2020 Physical Review A 101, 012512
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2020 Journal of Molecular Structure 1208, 127858
Polarisation labelling spectroscopy of rubidium dimer: highly excited 81Σ+u, 91Σ+u and 81Πu states
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2020 Journal of Quantitative Spectroscopy and Radiative Transfer 248, 106984
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2019 Phys. Rev. A100, 012507
Double-minimum 31Sigma+u state in Rb2: Spectroscopic study and possible applications for cold-physics experiments
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2019 J. Quant. Spectrosc. Rad. Transfer 239, 106650
The spin-orbit coupling of the 61Pi and 43Pi states in KCs: Observation and deperturbation
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2018 J. Mol. Spectrosc. 347, 48 – 55
Absolute vibrational numbering from isotope shifts in fragmentary spectroscopic data
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2018 J. Quant. Spectrosc. Rad. Transfer 210, 217 – 224
Experimental and theoretical study of the B(2)2Σ+→X(1) 2Σ+ system in the KSr molecule
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2018 Journal of Quantitative Spectroscopy and Radiative Transfer 204, 131-137
Spectroscopic study of the C(3)1Σ+ ← X1Σ+ and c(2)3Σ+ ← X1Σ+ transitions in KCs molecule
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2018 J. Quant. Spectrosc. Rad. Transfer 221, 225-232
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2018 Physical Chemistry Chemical Physics, 20, 26221-26240
The RbSr 2Σ+ ground state investigated via spectroscopy of hot & ultracold molecules
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2018 J. Mol. Spectrosc. 354, 60-64
Spectroscopic study of the 71Pu and 71S+u states of Rb2 molecule
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2017 J. of Quantitative Spectroscopy and Radiation Transfer 202, 328-334
The coupled system of (5) 1 Σ u + and (5) 1 Π u electronic states in Rb
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2017 Journal of Quantitative Spectroscopy and Radiative Transfer 202, 328-334
The coupled system of (5)1Σ+u and (5)1Πu electronic states in Rb2
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2016 J. Mol. Spectrosc. 330, 96-100
Potential energy curve of the D(3)1Piu state in rubidium dimer from spectroscopic measurements
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2016 Chem. Phys. Lett. 666, 19-21
Investigation of highly excited electronic 1Pi states in KLi molecule
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2015 Proc. of SPIE 5849, 182-185
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2015 J. of Chemical Physics 142, 234308
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2015 J. of Chemical Physics 143, 044308
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2015 J. of Molecular Spectroscopy 314, 63-72
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2014 Chem. Phys. Lett. 614, 36-40
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2014 J. Quant. Spectrosc. Rad. Transfer 145, 147-152
Study of the A1S+ and b3P0 states in LiCs by polarization labelling spectroscopy technique
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2013 Chemical Physics Lett. 586, 16-20
Polarisation labelling spectroscopy of the D1Π state in NaLi molecule
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2013 Chem.Phys. Letters 576, 10-14
Study of the 41Π state in KCs molecule by polarisation labelling spectroscopy
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2013 European Physical Journal - Special Topics 222. 2329-2333
The 41Σ+ electronic state of LiCs molecule
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2013 Chem.Phys.Lett. 586, 16-20
Polarization labelling spectroscopy of the D(singlet)Pi state in NaLi molecule
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2012 J.of Molecular Spectroscopy 276, 19-21
On the 41Σ+ state of the KCs molecule
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2012 Chemical Physics Letters 535, 17-20
The A1Σ+ electronic state of KLi molecule
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2011 J. of Chemical Physics 135, 044318-044323
Experimental investigation of electronic states of LiCs dissociation to Li(22s) and Cs(52D) atoms
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2011 Phys. Review A 84, 012507-012512
Spin-forbidden c 3+( = 1) ← X 1+ transition in NaCs: Investigation of the = 1 state in hot and cold environments
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2010 Optica Applicata 40, 577-585
Analysis of the mutually perturbed (31∏u, 41∏u) ← X1∑g+ band system in Li2
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2010 Chemical Physics Letters 497, 22-25
Investigation of the B1Π state in NaCs by polarisation labelling spectroscopy
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2010 Journal of Physics B 43, 155102-155106
Rydberg states of Li2 molecule studied by polarization labelling spectroscopy
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2010 Chemical Physics Letters 499, 36-39
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2009 Opt.Mat. 31, 527-531
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2009 Spectrochim. Acta A 73, 117-120
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2009 J.Chem.Phys. 130, 124307
Polarization labeling spectroscopy of highly excited Π1Π1 and Σ1+Σ1+ states in NaLi
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2009 Phys.Rev. A 79, 042716
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2009 Chem.Phys. 362, 130-134
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2008 J. Mol. Spectrosc. 250, 27-32
Investigation of the D 1Π state of NaK by polarisation labelling spectroscopy
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2008 Mol.Phys. 106, 1375-1378
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2008 Acta Phys.Pol.A 114, 731-738
Investigation of the Spin-Orbit Perturbation of the 61Π State in KLi Molecule
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2007 Eur. J. Phys. 28, 789
Cavity ring down spectroscopy experiment for an advanced undergraduate laboratory
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2007 Chem.Phys. 333, 214-218
The C1Πu and [image] states in Li2: Experiment and comparison with theory
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2007 Chemical Physics Letters 440, 199-202
First observation of the 31Π and 41Π states of NaLi molecule
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2007 J.Chem.Phys. 126, 194313
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2007 Eur. J. Phys. 28, 789-796
Cavity ring down spectroscopy experiment for advanced undergraduate laboratory
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2007 Chem.Phys.Lett. 444, 229-231
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2007 Chem. Phys. Lett. 458, 64-66
Experimental investigation of the 61Π and 71Π electronic states of KLi
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2006 J.Chem.Phys. 124, 2043088
Experimental long range potential of the BΠ1BΠ1 state in NaRb
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2006 Chem.Phys.Lett. 430, 247-250
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2006 Optica Appl. 36, 511-522
Exotic states of diatomic molecules and methods of their description
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2006 Optica Appl. 36, 469-473
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2006 Optica Appl. 36, 499-504
Investigation of a highly excited electronic 1Π state of NaLi molecule
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2005 Opt. Commun. 246, 569
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2005 Chem.Phys. Lett. 404, 323-326
Experimental characterisation of the double minimum 61Σ+ state in NaRb
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2005 Proc. of SPIE 5830, 231-235
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2005 J.Mol.Spectrosc. 232, 291-295
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2005 Eur.Phys.J. D36, 57-65
Accurate characterisation of the C(3)1Σ+ state of the NaRb molecule
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2005 Acta Phys.Pol. A108, 421-429
Polarisation Labelling Spectroscopy of Highly Excited (Rydberg) 1Πu States in Potassium Dimer
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2005 J.Mol.Spectrosc. 233, 290-292
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2004 J.Mol.Spectrosc. 224, 151-156
Experimental and theoretical investigation of the 61Σ+u and 71Πu states of K2
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2004 J.Mol.Spectrosc. 226, 95-102
On the C1Σ+ state of NaK
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2004 Chem.Phys.Lett. 394, 383-386
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2004 J.Chem.Phys. 121, 5754-5760
A regularized inverted perturbation approach method: Potential energy curve of the 4 1Σ+u4 1Σu+ state in Na2
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2004 Mol.Phys. 102, 1739-1742
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2003 J.Mol. Spectrosc. 220, 162-169
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2003 Chem.Phys.Lett. 372, 173-178
The molecular constants and potential energy curve of the D1Π state in KLi
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2003 Chem.Phys.Lett. 374, 297-301
Potential curve of the 41Σ+ state of NaK by polarisation labelling spectroscopy
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2003 Phys.Chem.Chem.Phys. 3, 3443-3452
The Cu*(2D5/2 and 2D3/2) chemiluminescent reactions with ClF
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2003 J.Mol.Spectrosc. 221, 279-284
Experimental study of the and states of NaK by polarization labeling spectroscopy technique
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2002 Spectrochim. Acta A 58, 2193-2197
Spectroscopic study of the E(4)1Σ+ state in NaLi
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2002 Che.Phys.Lett.353, 414-417
On the 51Σ+ state of NaK
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2002 Acta Phys. Pol. 102, 729-738
The C1Σ+ State of KLi Studied by Polarisation Labelling Spectroscopy Technique
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2001 Proc. SPIE 4397, 251-255
Determination of accurate potential energy curves for diatomic molecules
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2001 J.Chem. Phys. 114, 10725-10727
The ES1S+g state of lithium dimer revised
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2001 J.Chem.Phys. 115, 4118-4124
On the X 1∑+X 1∑+ state of KLi
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2001 J.Mol.Spectrosc. 209, 50-56
The Perturbation of the B1Π and C1Σ+ States in KLi
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2000 J.Chem. Phys. 112, 5740-5750
The c 3Σ+,c 3Σ+, b 3Π,b 3Π, and a 3Σ+a 3Σ+ states of NaK revisited
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2000 Comput.Phys. Commun. 128, 622-634
Construction of potential curves for diatomic molecular states by the IPA method
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2000 Phys.Rev.A 62, 042509
Spectroscopic investigation of the double-minimum 21Σ+ustate of the potassium dimer
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2000 J.Mol.Spectrosc. 203, 264-267
Accurate Potential Curve for the Double Minimum 21 Su1 State of Na2
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2000 J.Chem.Phys. 113, 6227-6234
Doppler-free UV-visible optical–optical double resonance polarization spectroscopy of the 2 1Σ+u2 1Σu+ double minimum state and the C 1ΠuC 1Πu state of Li2
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2000 J.Chem.Phys. 113, 6624-6628
The Li2Li2 F 1Σ+gF 1Σg+ “shelf” state: Accurate potential energy curve based on the inverted perturbation approach
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2000 J.Phys.B 33, L611-614
An improved description of the double minimum 6 [$^1\Sigma^+$] state of NaK by an IPA potential energy curve
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2000 Spectrochimica Acta A57, 1829-1831
The C(2)1Πu state of Na2 molecule studied by polarization labelling spectroscopy method