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Research interests

The focus of my research is the theoretical study of molecules in strong laser fields. My main areas of interest are:

  1. Manipulation of external and internal degrees of freedom of molecules with strong laser fields, e.g., alignment, orientation and manipulating torsion
  2. Ionization and high-order harmonic generation from molecules
Slides from (selected) talks

AMO physics seminar, Aarhus 2008: A talk about using strong non-resonant laser fields to manipulate the torsion of molecules can be found here.

 
Publications

2010:

Adam Etches, Christian Bruun Madsen, and Lars Bojer Madsen "Inducing elliptically polarized high-order harmonics from aligned molecules with linearly polarized femtosecond pulses" Phys. Rev. A 81, 013409 (2010)

C. B. Madsen, M. Abu-samha, and L. B. Madsen "High-order harmonic generation from polyatomic molecules including nuclear motion and a nuclear modes analysis" Phys. Rev. A 81, 043413 (2010)

2009:

C. B. Madsen, L. B. Madsen, S. S. Viftrup, M. P. Johansson, T. B. Poulsen, L. Holmegaard, V. Kumarappan, K. A. Joergensen, and H. Stapelfeldt "A combined experimental and theoretical study on realizing and using laser controlled torsion of molecules" J. Chem. Phys. 130, 234310 (2009)

C. B. Madsen, L. B. Madsen, S. S. Viftrup, M. P. Johansson, T. B. Poulsen, L. Holmegaard, V. Kumarappan, K. A. Joergensen, and H. Stapelfeldt "Manipulating the Torsion of Molecules by Strong Laser Pulses" Phys. Rev. Lett. 102, 073007 (2009)

2008:

Vinod Kumarappan, Lotte Holmegaard, Christian Martiny, Christian B. Madsen, Thomas K. Kjeldsen, Simon S. Viftrup, Lars Bojer Madsen, and Henrik Stapelfeldt "Multiphoton Electron Angular Distributions from Laser-Aligned CS2 Molecules" Phys. Rev. Lett. 100, 093006 (2008).

2007:

C. B. Madsen and L. B. Madsen "Theoretical studies of high-order harmonic generation: Effects of symmetry, degeneracy, and orientation" Phys. Rev. A 76, 043419 (2007),

C. B. Madsen, A. S. Mouritzen, T. K. Kjeldsen and L. B. Madsen "Effects of orientation and alignment in high-order harmonic generation and above-threshold ionization" Phys. Rev. A 76, 035401 (2007).

2006:

C. B. Madsen and L. B. Madsen "High-order harmonic generation from arbitrarily oriented diatomic molecules including nuclear motion and field-free alignment" Phys. Rev. A 74, 023403 (2006).

 
Details on my educational background

I did both my undergraduate and graduate studies at the University of Aarhus. I provide a summary of my education below. I spezcialized in the interaction of molecules with strong laser fields and the reports from my Bachelor of Science as well as my Master of Science are available from this link.
Undergraduate courses

Computer Science: Introductory Programming.

Math: Mathematics 10, Mathematics 11, Probability 1, Complex Theory of Functions, Analysis 1, Algebra, Geometry, Statistics.

Physics: Physics 101, Physics 102, Physics 201, Physics 202, Physics 203, Numerical Physics, Experimental Physics, Astrophysics, Statistical Physics, Solid State Physics, Atomic and Molecule Physics, Nuclear/Particle Physics.
Graduate courses

Physics: Solid State Physics IIa, Solid State Physics IIb, Advanced Quantum Mechanics, General Theory of Relativity, Atomic Physics II, Condensed Matter, Modern Quantum Physics, Quantum Gases, Numerical Methods (my webpage for the course), Quantum Field Theory, Statistical Physics II, Advanced Electrodynamics, Quantum Optics.
Studenterkollovkium

Den 21. maj 2007 holdt jeg mit studenterkollokvium. Det foregik i fysisk auditorium paa IFA og omhandlede inflation i det tidlige Univers. Nedenunder er abstract'et til kollokviet samt links til slideshowet og rapporten.

Astronomiske observationer viser, at Universet naesten er homogent og isotropt. I standard Big Bang modellen er denne geometriske simpelhed tilfaeldig, men en kosmologisk tilfredsstillende forklaring er eksistensen af en epoke i det tidlige Univers med eksponentiel vaekst. En saadan fase kaldes inflation og udjaevner i hoej grad Universet. Inflationen forudsiger dog smaa kvantemekaniske fluktuationer, der som froe danner grunden for makroskopiske strukturer. Saadanne teoretisk forudsagte strukturer kan direkte sammenlignes med maaledata og giver dermed mulighed for at teste inflationsmodellen.

Slides fra kollokviet samt rapporten kan findes ved at foelge dette link.