Maarten Mooij
A cryogenic buffer gas beam source of BaF molecules
Promotores: H.L. Bethlem; W.M.G. Ubachs
Defense: 3 June 2025
Frank Cozijn
High-Precision Rovibrational Saturation Spectroscopy of H2, HD and HT
Promotor: W.M.G. Ubachs; co-promotor E.J. Salumbides
Defense: 25 Oct 2024
Meissa Diouf
Saturated Ultra-Precision Spectroscopy of Water and HD with NICE-OHMS
Promotoren: W.M.G. Ubachs and K.S.E. Eikema
Defense: 6 Dec 2023
Zoi Bouza
Developments for broadband spectral and spatial characterization of tin plasma light sources for EUV lithography
Promotoren: O.O. Versolato, W.M.G. Ubachs, R. Hoekstra; copromotor: M. Bayraktar
Defense: 6 Oct 2023
Lars Behnke
Efficient 2-mum laser-wavelength driven plasma sources of EUV light
Promotoren: O.O. Versolato, W.M.G. Ubachs
Defense: 2 Oct 2023
Kin Fung (Kenneth) Lai
Laser precision spectroscopy on hydrogen isotopologues:
Tritiated molecules and vibrationally excited H2
Promotor: W.M.G. Ubachs; Co-promotores: E.J. Salumbides, M. Beyer
Defense: 28 June 2022
Joel Hussels
Improved determination of the dissociation energy of H2, HD, and D2
Promotores: W.M.G. Ubachs; Co-promotores H.L. Bethlem, E.J. Salumbides
Defense: 6 Dec 2021
Ruben Schupp
Spectral chracterization of solid-state laser-driven plasma sources of EUV light
Promotores: O.O. Versolato, R. Hoekstra, W.M.G. Ubachs
Defense: 17 Mar 2021
Ruud van der Beek
Bloch oscillations of meta-stable helium in an optical lattice
Promotores: H.L. Bethlem; Co-promotores: K.S.E. Eikema, W.M.G. Ubachs
Defense: 17 Mar 2021
Joris Scheers
Charge-state-resolved spectroscopy of multiply-charged tin ions
Promotores: O.O. Versolato, R.A. Hoekstra, W.M.G. Ubachs
Defense: 10 Nov 2020
Xia Zhang
Theoretical study of rotationally inelastic scattering of molecules
Promotores: W.M.G. Ubachs and A. van der Avoird; co-promotor S. Stolte
Defense: 5 March 2020
Francesco Torretti (Cum Laude)
Spectrocopy of highly-charged Sn ions for extreme ultraviolet nanolithography
Promotores: W.M.G. Ubachs and R.A. Hoekstra; co-promotor O.O. Versolato
Defense: 19 December 2019
Yuanqing Wang
Spontaneous Rayleigh-Brillouin
Scattering in Molecular Gases
Promotores: W.M.G. Ubachs and W. van de Water
Defense: 4 December 2019
Xavier Bacalla
Electronic Spectroscopy of Molecules of Astrophysical Interest;
Towards improving our knowledge of the DIB carriers
Promotores: H.V.J. Linnartz, W.M.G. Ubachs;
Defense: 2 July 2019 (Leiden)
Mart-Johan Deuzeman
Generation and interaction of energetic tin ions
Promotores: R.A. Hoekstra, W.M.G. Ubachs; co-promotor: O.O. Versolato
Defense: 21 June 2019 (Groningen)
Sayan Patra
Towards Doppler-free two-photon spectroscopy of trapped and cooled HD+ ions
Promotores: W.M.G. Ubachs and K.S.E. Eikema; co-promotor: J.C.J. Koelemeij
Defense: 9 May 2019
Dmitry Kurilovich
Laser-induced dynamics of liquid tin microdroplets
Promotores: W.M.G. Ubachs and R.A. Hoekstra; co-promotor: O.O. Versolato
Defense: 4 April 2019
Madhu Talluri Trivikram
High-Precision REMPI and CARS studies on molecular hydrogen and tritium
Promotor: W.M.G. Ubachs; co-promotor: E.J. Salumbides
Defense: 7 February 2019
Bob Rengelink
A magic wavelength optical dipole trap for high-precision spectroscopy of ultracold metastable helium
Promotor: W. Vassen; co-promotor W.M.G. Ubachs
Defense: 10 December 2018
Robert Altman
Ramsey-comb spectroscopy in the deep ultraviolet for tests of molecular quantum theory
Promotor: K.S.E. Eikema; co-promotor: W.M.G. Ubachs
Defense: 13 November 2018
Aernout P.P. van der Poel
Cold Collisions in a Molecular Synchrotron
Promotor: W.M.G. Ubachs, co-promotor: H.L. Bethlem
Defense: 13 March 2018
Mario Dapra
Search for drifting constants of nature via optical and radio astronomy
Promotor: Wim Ubachs; co-promotor: Rick Bethlem
Defense: 20 November 2017
Adonis Silva Flores
An ultracold, optically trapped mixture of 87Rb and metastable 4He atoms
Promotor: Wim Ubachs; co-promotors: Wim Vassen, Steven Knoop
Defense: 30 May 2017
Remy Notermans (Cum Laude)
High-Precision spectroscopy of Forbidden Transitions in Ultracold 4He and 3He
Promotor: Wim Ubachs; co-promotor: Wim Vassen
Defense: 15 March 2017
Jurriaan Biesheuvel
Probing QED and fundamental constants through vibrational spectroscopy of HD+
Promotor: W.M.G. Ubachs, copromotor: J.C.J. Koelemeij
Defense: 28 June 2016
Mingli Niu
High Resolution Laser and Synchrotron Spectroscopic Studies on H2 and CO
Promotor: W.M.G. Ubachs, copromotor: E.J. Salumbides
Defense: 30 November 2015
Mohammad Rafiee Fanood
Molecular chirality under the reaction microscope:
Mass-selective photoelectron circular dichroism of pure and multi-component enantiomeric mixtures
Promotor: W.M.G. Ubachs, I. Powis
Defense: 22 October 2015
Congsen Meng
Femtosecond laser detection of xenon and Stark decelerated polyatomic molecules
Promotor: W.M.G. Ubachs, copromotor: H.L. Bethlem
Defense: 30 June 2015
Julija Bagdonaite (Cum Laude)
Search for a variation of the proton-electron mass ratio from molecular hydrogen and methanol
Promotor: W.M.G. Ubachs, L. Kaper, copromotor: M.T. Murphy
Defense: 7 April 2015
Ziyu Gu
Spontaneous Rayleigh-Brillouin Scattering on Atmospheric Gases
Promotor: W.M.G. Ubachs, copromotor: W. van de Water
Defense: 23 March 2015
Adrian J. de Nijs
Molecular radicals in the search for drifting constants
Promotor: W.M.G. Ubachs, copromotor: H.L. Bethlem
Defense: 2 October 2014
Marina Quintero Perez
Preparation of an ultra-cold sample of ammonia molecules for precision measurements
Promotor: W.M.G. Ubachs, copromotor: H.L. Bethlem
Defense: 8 September 2014
Mohammad Ali Haddad
Cavity Ring-Down Laser Spectroscopy of Carbon-Chain Molecules
Promotores: W.M.G. Ubachs and H.V.J. Linnartz; copromotor: D. Zhao
Defense: 24 March 2014
Paul Jansen (Cum Laude)
Polyatomic molecules for probing a possible variation of the proton-to-electron mass ratio
Promotores: W.M.G. Ubachs, H.L. Bethlem
Defense: 1 July 2013
Gareth Dickenson
Laser and Synchrotron Spectroscopic Studies of Molecular Hydrogen
Promotor: W.M.G. Ubachs; copromotor E.J. Salumbides
Defense: 8 May 2013
Shreyas Raghunathan
Studies in Physical optics; Coherence Theory and Surface Plasmons
Promotores: T.D. Visser, W.M.G. Ubachs
Defense: 3 May 2013 (TU Delft)
Rob van Rooij
Frequency Metrology in Quantum Degenerate Helium
Promotores: W.M.G. Ubachs; copromotor: W. Vassen
Defense: 8 June 2012
Dominik Kandula
XUV Frequency Comb Metrology and the Ground State of Helium
Promotores: K.S.E. Eikema, W.M.G. Ubachs
Defense: 1 December 2011
Anne Lisa Wolf
Frequency comb spectroscopy on trapped calcium ions
Promotores: W.M.G. Ubachs, K.S.E. Eikema; co-promtor: S. van den Berg
Defense: 7 July 2011
Thomas van Dijk
Experimental and Theoretical studies in Optical Coherence Theory
Promotores: T.D. Visser, W.M.G. Ubachs
Defense: 4 April 2011
Maria Ofelia Vieitez Hornos
XUV laser studies of Rydberg-valence states in N2 and H+H- heavy Rydberg states
Promotores: W.M.G. Ubachs, C. A. de Lange, L.E. Berg; copromotor: O. Launila
Defense: 2 June 2010
Toncho Ivanov
XUV spectroscopy of highly excited states in H2, HD and D2
Promotores: W.M.G. Ubachs, C. A. de Lange
Defense: 7 December 2010
Dmitry Ityaksov
Cavity Ring-Down Optical Extinction Measurements of Atmospheric Molecules
Promotores: W.M.G. Ubachs, H.V.J. Linnartz
Defense: 30 November 2009
Edcel John Salumbides
Laser metrology studies for probing variation of fundamental constants
Promotor: W.M.G. Ubachs; copromotor: K.S.E. Eikema
Defense: 26 May 2009
Lineke van der Sneppen
Liquid-phase cavity ring-down spectroscopy for improved analytical detection sensitivity
Promotores: W.M.G. Ubachs, C. Gooijer; copromotor: F. Ariese
Defense: 10 November 2008
Sandro Hannemann
Deep-ultraviolet frequency metrology
with a narrowband titanium:sapphire laser
Promotor: W.M.G. Ubachs; copromotor: E.-J. van Duijn
Defense: 24 May 2007
Arjan Sprengers
Extreme ultraviolet laser excitation of molecular nitrogen;
perturbations and predissociation
Promotor: W. Ubachs; copromotor: B.R. Lewis (Canberra, Australia)
Defense: 29 June 2006
Marc Smits
Multi active electron effects in the strong field ionization of transition metal atoms and clusters
Promotores: W.M.G. Ubachs, C.A. de Lange; copromotor: A. Stolow (Ottawa, Canada)
Defense: 22 February 2005
Maarten Sneep
The atmosphere in the laboratory:
cavity ring-down measurements on scattering and absorption
Promotor: W.M.G. Ubachs
Defense: 23 November 2004
Fernando Brandi
Table-top tunable narrow-band extreme ultraviolet sources: from low to high-order optical harmonic generation
Promotor: W.M.G. Ubachs
Defense: 1 July 2004
Ruediger Lang
Spectral Sampling Techniques for Atmospheric modeling
Promotores: W. van der Zande, W.M.G. Ubachs; copromotor: E.A.A. Aben
Defense: 31 October 2002
Arno de Lange
XUV Multi-resonance spectroscopy of hydrogen and nitrogen
Promotor: W.M.G. Ubachs
Defense: 14 February 2002
Iavor Veltchev
Stimulated Brillouin Scattering Pulse Compression and Harmonic Generation
Promotor: W. Hogervorst; copromotor: W.M.G. Ubachs
Defense: 7 June 2001
Hans Naus
Cavity Ring-Down Spectroscopy on Atmospheric Molecules
Promotor: W. Hogervorst; copromotor: W.M.G. Ubachs
Defense: 13 February 2001
Elmar Reinhold
Extreme Ultraviolet Laser Spectroscopy of the hydrogen molecule:
excited states with large internuclear separation
Promotor: W. Hogervorst; copromotor: W.M.G. Ubachs
Defense: 18 May 2000
Paul Hinnen
XUV-laser spectroscopy of H2 and the mystery of the diffuse interstellar bands
Promotores: W. Hogervorst, S. Stolte; copromotor: W.M.G. Ubachs
Defense: 15 September 1997
Kjeld Eikema (Cum Laude)
QED and the ground state of helium;
precision extreme ultraviolet laser spectroscopy
Promotor: W. Hogervorst; copromotores: W.M.G. Ubachs, W. Vassen
Defense: 24 June 1996
Robert van Leeuwen
Electron correlation in autoionizing states of barium
Promotor: W. Hogervorst; copromotor: W.M.G. Ubachs
Defense: 11 December 1995
Pieternel Levelt
A coherent XUV-source for high resolution spectroscopy:
application to diatomic molecules
Promotor: W. Hogervorst; copromotor W.M.G. Ubachs
Defense: 11 November 1992
Ilse Aben
Resonance CARS in I2 and Br2
Promotor: W. Hogervorst; copromotor W.M.G. Ubachs
Defense: 29 September 1992
Robert de Graaf
Dielectronic states in barium
Promotor: W. Hogervorst; copromotor W.M.G. Ubachs
Defense: 17 October 1991