Robert J. Levis

 

Robert Levis

 

Professor

B.A. (1984) La Salle College
Ph.D. (1988) The Pennsylvania State University

Director:
CAPR

Center for Advanced Photonics Research

OFFICE
Beury Hall 244


MAILING ADDRESS

Department of Chemistry
Beury Hall 130
1901 N. 13th Street
Philadelphia, PA 19122


PHONE

office: 215-204-5241
fax: 215-204-1532
lab: 215-204-4871, -4872, -1052


E-MAIL
rjlevis@temple.edu

 

RESEARCH GROUP

 

Analytical / Photonics / Physical

Research Interests

Strong Field Chemistry

Levis pioneered the area of strong field chemistry, the use of ultrafast and intense lasers to modify, manipulate and detect virtually any molecular system. This work employs lasers having electric field strength of magnitude equal to the forces binding atoms into molecules to reprogram specific characteristics of molecular. Recent work combines strong laser fields with adaptive control to develop novel photonic chemistries. This work has applications in the detection of chemical warfare agents, developing novel materials processing methods (e.g. dentistry) and in biophotonics (e.g. deep tissue cancer detection).

 

Selected Publications

 

Perez, J.J., Flanigan, P.M., Brady, J.J., Levis, R.J., “The Classification of Smokeless Gun powders using Laser Electrospray Mass Spectrometry and Offline Multivariate Statistical Analysis,” Analytical Chemistry, 2013 85(1), 296-302

 

Flanigan, P.M., Radell, L., Brady, J.J., Levis, R.J., “Differentiation of Eight Phenotypes and Discovery of Potential Biomarkers for a Single Plant Organ Class Using Laser Electrospray Mass Spectrometry and Multivariate Statistical Analysis,” Analytical Chemistry, 2012 84(14) 6225-6232

 

Odhner, J.H., Romanov, D.A., McCole, E.T., Wahlstrand, J.K., Milchberg, H.M., Levis R.J., “Ionization-Grating-Induced Nonlinear Phase Accumulation in Spectrally-Resolved Transient Birefringence Measurements at 400 nm,” Physical Review Letters, 2012 109(6), 065003

 

Brady, J.J., Judge, E.J., Levis, R.J., “Reply to Breuker et al.: How laser electrospray mass spectrometry (LEMS) measures condensed phase protein structure, not vacuum structure,” Proceedings of the National Academy of Sciences of the United States of America, 2012 109(5), E207-E207

 

Flanigan, P.M., Perez, J.J., Karki, S., Levis, R.J., “Quantitative Measurements of Small Molecule Mixtures Using Laser Electrospray Mass Spectrometry,” Analytical Chemistry, 2012

 

Judge, E.J., Brady, J.J., Barbano, P.E., Levis, R.J.,"Nonresonant Femtosecond Laser Vaporization with Electrospray Postionization for ex vivo Plant Tissue Typing Using Compressive Linear Classification" Analytical Chemistry, 2011 83(6) 2145-2151

 

Compton, R., Filin, A., Romanov, D.A., Levis, R.J., “Dynamic Rabi Sidebands in Laser-Generated Micro-Plasmas: Tunablity and Control,Physical Review A, 2011 83(5) 1050-2947

 

Brady, J.J., Judge, E.J., Levis, R.J., “Nonresonant Femtosecond Laser Vaporization of Aqueous Protein Preserves Folded Structure,” Proceedings of the National Academy of Sciences, 2011 108(30), 12217-12222

 

Flanigan, P.M., Brady, J.J., Judge, E.J., Levis, R.J., “Determination of Inorganic Improvised Explosive Device Signatures Using Laser Electrospray Mass Spectrometry Detection with Offline Classification,” Analytical Chemistry, 2011 83(18) 7115-7122

 

Odhner, J.H., McCole, E.T., Levis, R.J., “Filament-Driven Impulsive Raman Spectroscopy,” Physical Chemistry A, 2011 115 (46), 13407-13412

 

Odhner, J.H., Romanov, D.A., Levis, R.J., “Filament-Based Stimulated Raman Spectroscopy,SPIE Photonics West Conference, 2010 7582: 75820M.

 

Compton, R., Filin, A., Romanov, D.A., Levis, R.J., “Tunable Broadband Optical Generation via Giant Rabi Shifting in a Micro-plasma,” SPIE Photonics West Conference, 2010 7582: 75820D.

 

Brady, J.J., Judge, E.J., Levis, R.J., “Laser Electrospray Mass Spectrometry of Adsorbed Molecules at Atmospheric Pressure,” SPIE Photonics West Conference, 2010 7582: 75820M.

 

Plewicki, M., Compton, R., Filin, A., Levis, R.J., “Origin of the Spectral Coherence in Dynamically Broadened Rabi Sidebands,” Optics Letters, 2010 35(5) 778-780.

 

Smith, S.M., Romanov, D.A., Li, X., Sonk, J.A., Schlegel, H.B., Levis, R.J., “Numerical Bound State Electron Dynamics of Carbon Dioxide in the Strong-Field Regime,” Journal of Physical Chemistry A, 2010 114(7) 2576-2587.

 

Smith, S.M., Romanov, D.A., Heck, G., Schlegel, H.B., Levis, R.J., “Observing the Transition from Stark-Shifted, Strong-Field Resonance to Nonadiabatic Excitation,” Journal of Physical Chemistry C, 2010 114(12) 5645-5651.

 

Romanov, D.A., Compton, R., Filin, A., Levis, R.J., “Dynamics of Strong-Field Laser-Induced Microplasma Formation in Noble Gases,” Physical Review A, 2010 81(3) 033403.

 

Judge, E.J., Brady, J.J., Dalton, D., Levis, R.J., “Analysis of Pharmaceutical Compounds from Glass, Fabric, Steel, and Wood Surfaces at Atmospheric Pressure Using Spatially Resolved, Nonresonant Femtosecond Laser Vaporization Electrospray Mass Spectrometry,Analytical Chemistry, 2010 82(8) 3231-3238.

 

Brady, J.J., Judge, E.J., Levis, R.J., “Identification of Explosives and Explosive Formulations using Laser Electrospray Mass Spectrometry,” Rapid Communications in Mass Spectrometry, 2010 24(11) 1659-1664.

 

Coughlan, M.A., Plewicki, M., Levis, R.J., “Creating Multiple Longitudinal Foci With Parametric Spatio-Temporal Focusing,SPIE Photonics West Conference, 2010 Vol. 7570, 75700R.

 

Odhner, J.H., Romanov, D.A., Levis, R.J., “Self-Shortening Dynamics Measure Along a Femtosecond Filamentation in Air,Physical Review Letters, 2010 105(12) 125001-125004.

 

Liang W., Isborn, C.M., Lindsay, A., Li XS, Smith, S.M., Levis, R.J, “Time-Dependent Density Functional Theory Calculations of Ehrenfest Dynamics of Laser Controlled Dissociation of NO+: Pulse Length and Sequential Multiple Single-Photon Processes,” Journal of Physical Chemistry, 2010 114(21), 6201-6206.

 

Odhner, J.H., Romanov, D.A., Levis, R.J., “Spatio-Temporal Dynamics of Laser Filamentation Measured via Impulsive Raman Scattering,” International Conference on Ultrafast Phenomena, OSA Technical Digest, 2010 18(23), 23973-23986

 

Coughlan, M.A., Plewicki, M., Levis, R.J., “Spatio-Temporal and -Spectral Coupling of Shaped Laser Pulses in a Focusing Geometry,” Optics Express, 2010 18(23) 23973-23986.

 

Judge, E.J., Brady, J.J., Levis, R.J., “Mass Analysis of Biological Macromolecules at Atmospheric Pressure Using Nonresonant Femtosecond Laser Vaporization with Electrospray Post-ionization,” Analytical Chemistry, 2010 82(24) 10203-10207.

 

Coughlan, M.A., Plewicki, M, Weber, S.M., Bowlan, P., Trebino, R., Levis, R.J., “Shaped Pulse Electric-Field Construction and Interferometric Characterization: The SPECIFIC Method,” Journal of Physical Chemistry OCIS, 2009

 

Heck G., Judge E.J., Odhner J., Plewicki, M., Levis R.J., “Remote Sensing via Femtosecond Filament Based Technologies,” GomacTech Digest Conference, Orlando, FL, 2009

 

Robert J. Levis, “Response to Zhu et al.: Experimental Requirements for Strong Field Control in the Picosecond Regime,” Journal of Physical Chemistry, 2009 113(17), 5267-5268.

 

Judge E.J., Heck G., Cerkez, C.B., and Levis R.J., “Discrimination of Composite Graphite Samples Using Remote Filament-induced Breakdown Spectroscopy,” Analytical Chemistry, 2009 81(7), 2658-2663.

 

Filin, A., Compton, R., Romanov, D.A., Levis, R.J., “Impact Ionization Cooling in Femtosecond Laser-Induced Plasma Channels,” Physical Review Letters, 2009 102, 155004.

 

Odhner, J.H., Romanov, D., Levis, R.J., “Rovibrational Wave-packet Dispersion during Femtosecond Laser Filamentation in Air,” Physical Review Letters, 2009 103(7), 075005.   

 

Coughlan, M.A., Plewicki, M., Levis, R.J., “Parametric Spatio-Temporal Control of Focusing Laser Pulses,” Optics Express, 2009 17(18), 15808-15820.

 

Brady, J.J., Judge, E.J., Levis, R.J., “Mass Spectrometry of Intact Neutral Macromolecules Using Intense Non-Resonant Femtosecond Laser Vaporization with Electrospray Post-Ionization,” Rapid Communications in Mass Spectrometry, 2009 23(19), 3151-3157.

 

Compton, R., Filin, A., Romanov, D.A., Levis, R.J., “Observation of Broadband Time-Dependent Rabi Shifting in Microplasmas,” Physical Review Letters, 2009 103(20), 205001.