title: Visible and UV coherent Raman spectroscopy of dipicolinic acid.
abstract: We use time-resolved coherent Raman spectroscopy to obtain molecule-specific signals from dipicolinic acid (DPA), which is a marker molecule for bacterial spores. We use femtosecond laser pulses in both visible and UV spectral regions and compare experimental results with theoretical predictions. By exciting vibrational coherence on more than one mode simultaneously, we observe a quantum beat signal that can be used to extract the parameters of molecular motion in DPA. The signal is enhanced when an UV probe pulse is used, because its frequency is near-resonant to the first excited electronic state of the molecule. The capability for unambiguous identification of DPA molecules will lead to a technique for real-time detection of spores.
authors.affiliation: Institute for Quantum Studies, Texas A&M University, College Station, TX 77843-4242, USA.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Pestov
authors.forename: Miaochan
authors.initials: M
authors.lastname: Zhi
authors.forename: Zoe-Elizabeth
authors.initials: ZE
authors.lastname: Sariyanni
authors.forename: Nikolai G
authors.initials: NG
authors.lastname: Kalugin
authors.forename: Alexandre A
authors.initials: AA
authors.lastname: Kolomenskii
authors.forename: Robert
authors.initials: R
authors.lastname: Murawski
authors.forename: Gerhard G
authors.initials: GG
authors.lastname: Paulus
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Sautenkov
authors.forename: Hans
authors.initials: H
authors.lastname: Schuessler
authors.forename: Alexei V
authors.initials: AV
authors.lastname: Sokolov
authors.forename: George R
authors.initials: GR
authors.lastname: Welch
authors.forename: Yuri V
authors.initials: YV
authors.lastname: Rostovtsev
authors.forename: Torsten
authors.initials: T
authors.lastname: Siebert
authors.forename: Denis A
authors.initials: DA
authors.lastname: Akimov
authors.forename: Stefanie
authors.initials: S
authors.lastname: Graefe
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Kiefer
authors.forename: Marlan O
authors.initials: MO
authors.lastname: Scully
mesh_terms: D015415:Biomarkers; D004791:Enzyme Inhibitors / Q000737:chemistry*; D008433:Mathematics; D010848:Picolinic Acids / Q000032:analysis*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation / Q000379:methods*; D013171:Spores, Bacterial / Q000737:chemistry*
chemical_list: D015415:Biomarkers; D004791:Enzyme Inhibitors; D010848:Picolinic Acids; C004860:dipicolinic acid