Vibrational population distributions in infrared multiple-photon excitation probed by coherent anti-stokes Raman spectroscopy |
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| Affiliation: | 1. Institute of Physics and Technology, Ural Federal University, Ekaterinburg, 620002, Russia;2. Faculty of Physics, Moscow State University, Moscow, 119991, Russia;3. Institute of Metal Physics, Russian Academy of Sciences, Ekaterinburg, 620002, Russia;1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People’s Republic of China;2. College of Physics, Jilin University, Changchun 130012, People’s Republic of China;1. Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, 60455-900, Brazil;2. Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Fortaleza, Ceará, 60040-531, Brazil;3. Faculdade de Física, Universidade Federal do Pará, Belém, Pará, 66075-110, Brazil;4. Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea;5. Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi, 380-8553, Japan;6. Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, Rio de Janeiro, 25250-020, Brazil;7. Departamento de Química, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil;8. Instituto de Física, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, RJ, 21941-972, Brazil;9. Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, 13083-100, Brazil;10. Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, 35487, USA;1. Departamento de Física, Universidade Federal do Ceará, P.O. Box 6030, CEP 60455-900, Fortaleza, Ceará, Brazil;2. Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), CEP 25250-020, Duque de Caxias, RJ, Brazil;3. School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, buk-gu, Gwangju, 500-757, Republic of Korea;4. Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-8553, Japan;5. Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, MG 30123-970, Brazil;6. Massachusetts Institute of Technology, Departments of Physics and Electrical Engineering & Computer Science, Cambridge, MA 02139, United States;1. ETH Zürich, Photonics Laboratory, 8093 Zürich, Switzerland;2. University of Vienna, Faculty of Physics, 1090 Wien, Austria |
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| Abstract: | Coherent anti-stokes Raman spectroscopy has been used as a probe for molecules pumped by high-intensity CO2 laser radiation. Ozone, sulfur hexafluoride, and chloroethane have been investigated. The intensity of the ground-state CARS signal is decreased by IR multiphoton excitation, but signals at new vibrational origins do not appear. The observations on chloroethane are interpreted in terms of a rate-equation model for IRMPE, modified to take vibrational redistribution into account. |
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