Dr. Charles R Markus

Professional Information

Graduate Student: Analytical Chemistry
Project: Sub-Doppler spectroscopy of molecular ions in the mid-infrared.
B.S. Chemistry and Mathematics, University of Wisconsin-Madison, 2012

cmarkus2@illinois.edu
CV

Current Research

Studying molecular ions relevant to fundamental physics and astrochemistry using cavity enhanced techniques.

Papers

7	C. R. Markus and B. J. McCall "Highly accurate experimentally determined energy levels of H₃⁺" Journal of Chemical Physics (2019), 150, 214303.
6	C. R. Markus, P. A. Kocheril, and B. J. McCall "Sub-Doppler rovibrational spectroscopy of the v₁ fundamental band of D₂H⁺" Journal of Molecular Spectroscopy (2019), 355, 8-13.
5	P. A. Kocheril, C. R. Markus, A. M. Esposito, A. W. Schrader, T. S. Dieter, and B. J. McCall "Extended sub-Doppler resolution spectroscopy of the v₃ band of methane" Journal of Quantitative Spectroscopy and Radiative Transfer (2018), 215, 9-12.
4	C. R. Markus, A. J. Perry, J. N. Hodges, and B. J. McCall "Improving cavity-enhanced spectroscopy of molecular ions in the mid-infrared with up-conversion detection and Brewster-plate spoilers" Optics Express (2017), 25, 3709-3721.
3	C. R. Markus, J. N. Hodges, A. J. Perry, G. S. Kocheril, H. S. P. Müller and B. J. McCall "High precision rovibrational spectroscopy of OH⁺" The Astrophysical Journal (2016), 817, 138-142.
2	A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril and B. J. McCall "High-precision R-branch transitions in the ν₂ fundamental band of H₃⁺" Journal of Molecular Spectroscopy (2015), 317, 71-73.
1	A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, and B. J. McCall "Communication: High-precision sub-Doppler infrared spectroscopy of the HeH⁺ ion" Journal of Chemical Physics (2014), 141, 101101-1-101101-5.

Talks

10	C. R. Markus, J. E. McCollum, T. S. Dieter, P. A. Kocheril, and B. J. McCall "Sub-doppler rovibrational spectroscopy of the H₃⁺ cation and isotopologues" Seventy Second International Symposium on Molecular Spectroscopy, University of Illinois at Urbana-Champaign, 2017.
9	C. R. Markus, J. E. McCollum, T. S. Dieter, J. N. Hodges, A. J. Perry, and B. J. McCall "Cavity-enhanced spectroscopy of molecular ions in the mid-infrared with up-conversion detection and Brewster-plate spoilers" Seventy Second International Symposium on Molecular Spectroscopy, University of Illinois at Urbana-Champaign, 2017.
8	C. R. Markus, J. E. McCollum, T. S. Dieter, P. A. Kocheril, and B. J. McCall "Cavity-enhanced spectroscopy of molecular ions in the mid-infrared with up-conversion detection and Brewster-plate spoilers" 12th International User Meeting on Cavity Enhanced Spectroscopy, Radboud University, Nijmegen, Netherlands, 2017.
7	A. J. Perry, G. S. Kocheril, J. N. Hodges, C. R. Markus and B. J. McCall "Highly accurate and precise infrared transition frequencies of the H₃⁺ cation" Seventy First International Symposium on Molecular Spectroscopy, The University of Illinois at Urbana-Champaign, 2016.
6	C. R. Markus, J. N. Hodges, A. J. Perry, B. J. McCall "Improved spectroscopy of molecular ions in the mid-infrared with up-conversion detection" Seventy First International Symposium on Molecular Spectroscopy, The University of Illinois at Urbana-Champaign, 2016.
5	A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, P. A. Jenkins II and B. J. McCall "Progress Towards a High-Precision Infrared Spectroscopic Survey of the H₃⁺ Ion" Seventieth International Symposium on Molecular Spectroscopy, University of Illinois, Urbana-Champaign, IL, 2015.
4	J. N. Hodges, A. J. Perry, C. R. Markus, P. A. Jenkins II, G. S. Kocheril and B. J. McCall "Advances in Sensitive, Accurate, Precise Ion Spectroscopy through Noise Immune Cavity Enhanced Optical Heterodyne Velocity Modulation Spectroscopy" Eleventh International User Meeting & Summer School on Cavity-Enhanced Spectroscopy, NIST / NOA, Boulder, CO, 2015.
3	C. R. Markus, A. J. Perry, J. N. Hodges, G. S. Kocheril, P. A. Jenkins II, and B. J. McCall "High Precision Infrared Spectroscopy of OH⁺" Seventieth International Symposium on Molecular Spectroscopy, University of Illinois, Urbana-Champaign, IL, 2015.
2	A. J. Perry, J. N. Hodges, C. R. Markus, G. S. Kocheril, P. A. Jenkins II, and B. J. McCall "High-Precision Sub-Doppler Infrared Spectroscopy of HeH⁺" Sixty-Ninth International Symposium on Molecular Spectroscopy, University of Illinois, Urbana-Champaign, IL, 2014.
1	J. N. Hodges, A. J. Perry, C. R. Markus, P. A. Jenkins II, G. S. Kocheril, and B. J. McCall "New High Precision Linelist of H₃⁺" Sixty-Ninth International Symposium on Molecular Spectroscopy, University of Illinois, Urbana-Champaign, IL, 2014.

Posters

2	G. S. Kocheril, A. J. Perry, C. R. Markus, J. N. Hodges and B. J. McCall "High Precision Spectroscopy of Molecular Ions" Chemistry REU Annual Poster Session, The University of Illinois at Urbana-Champaign, 2015.
1	C. R. Markus, A. J. Perry, J. N. Hodges, G. S. Kocheril and B. J. McCall "High precision and high accuracy spectroscopy of molecular ions" Midwest Astrochemistry Meeting, The University of Northern Iowa, Cedar Falls, IA, 2015.

Other Publications

2	C. R. Markus "Sensitive and high-precision rovibrational spectroscopy of molecular ions relevant to astronomical and quantum chemistry" Ph. D. Thesis, University of Illinois, 2019.
1	C. R. Markus "Progress in High-Precision Spectroscopy of Molecular Ions in the Mid-Infrared" Research Prospectus for Preliminary Examination, University of Illinois, 2015.