Journal of Raman Spectroscopy

Cover image for Vol. 42 Issue 10

October 2011

Volume 42, Issue 10

Pages 1825–1912

  1. Editorials

    1. Top of page
    2. Editorials
    3. Research Articles
  2. Research Articles

    1. Top of page
    2. Editorials
    3. Research Articles
    1. Flame temperature diagnostics with water lines using mid-infrared degenerate four-wave mixing (pages 1828–1835)

      Z. W. Sun, Z. S. Li, B. Li and M. Aldén

      Version of Record online: 25 MAR 2011 | DOI: 10.1002/jrs.2894

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      The dramatic spectral structure variations of infrared degenerate four-wave mixing spectroscopy (IR-DFWM) of hot H2O lines were demonstrated for flame thermometry. The ratio of peak intensities between two example lines, as shown in the figure at around 3231 cm−1, changes more than 200 times as the temperature varying from 1000 to 1900 K, which motivates the development of this non-intrusive and spatially resolved optical technique.

    2. Herman–Wallis correction in vibrational CARS of oxygen (pages 1836–1842)

      Michele Marrocco

      Version of Record online: 11 MAY 2011 | DOI: 10.1002/jrs.2965

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      Vibration-rotation interaction generates corrections to spectral line intensities. Such problem is here outlined for the spectral response of some medium-weight diatomics in the gas phase and probed by means of vibrational coherent anti-Stokes Raman scattering (CARS). Emphasis is on oxygen for the peculiarity of its anti-bonding molecular orbital.

    3. On the sensitivity of rotational CARS N2 thermometry to the Herman–Wallis factor (pages 1843–1847)

      Alexis Bohlin, Per-Erik Bengtsson and Michele Marrocco

      Version of Record online: 11 FEB 2011 | DOI: 10.1002/jrs.2869

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      Various literature values for the Herman–Wallis (HW) factor have been used as input data to the calculation of rotational CARS N2 spectra. The sensitivity of evaluated temperatures to these HW-factors has been examined by analyzing experimental data as well as in a theoretical investigation.

    4. Dissection of dispersed off-resonant femtosecond degenerate four-wave mixing of O2 (pages 1848–1853)

      G. Knopp, P. P. Radi, Y. Sych and T. Gerber

      Version of Record online: 31 MAR 2011 | DOI: 10.1002/jrs.2921

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      Simultaneous time and frequency detection in electronically off-resonant femtosecond degenerate four-wave mixing experiments displays spectral features that are covered in frequency integrated measurements. Information available from such experiments is split between the time and frequency domains. The measured rotational recurrences from oxygen (O2) exhibit spectral characteristics that are in accordance with simulations.

    5. A theoretical investigation of super-resolution CARS imaging via coherent and incoherent saturation of transitions (pages 1854–1858)

      Willem P. Beeker, Chris J. Lee, Klaus J. Boller, Petra Groß, Carsten Cleff, Carsten Fallnich, Herman L. Offerhaus and Jennifer L. Herek

      Version of Record online: 3 MAY 2011 | DOI: 10.1002/jrs.2949

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      A density matrix model of CARS has been used to identify two modified CARS experiments that lead to sub-diffraction-limited resolution images. The key is the spatial manipulation of the coherence between the ground state and the vibrational state. When the control and vibrational states are coupled via incoherent processes, the populations of the two states reach equilibrium very quickly, preventing CARS. When the control state has a rather long coherence lifetime, spatially dependent Rabi oscillations are observed.

    6. Phase-shaping strategies for coherent anti-Stokes Raman scattering (pages 1859–1863)

      A. C. W. van Rhijn, M. Jurna, A. Jafarpour, J. L. Herek and H. L. Offerhaus

      Version of Record online: 25 MAR 2011 | DOI: 10.1002/jrs.2922

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      We numerically study the possibilities of optimizing selectivity, specificity, and sensitivity in coherent anti-Stokes Raman scattering (CARS) by precalculating pulse shapes using an evolutionary algorithm (c and d), using an implementation for CARS microscopy that uses a broadband pump and probe field in combination with a narrowband Stokes field. Furthermore we show the retrieval of vibrational phase information by fitting of spontaneous Raman scattering data with an evolutionary algorithm (a and b).

    7. Raman spectroscopy and CARS microscopy of stem cells and their derivatives (pages 1864–1870)

      Andrew Downes, Rabah Mouras, Pierre Bagnaninchi and Alistair Elfick

      Version of Record online: 8 JUL 2011 | DOI: 10.1002/jrs.2975

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      Raman spectroscopy and CARS microscopy were used to characterise stem cells and their derivatives.

    8. New opportunities offered by compact sub-nanosecond supercontinuum sources in ultra-broadband multiplex CARS microspectroscopy (pages 1871–1874)

      P. Leproux, V. Couderc, A. de Angelis, M. Okuno, H. Kano and H. Hamaguchi

      Version of Record online: 30 MAY 2011 | DOI: 10.1002/jrs.2995

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      We report, to the best of our knowledge, the first turnkey and compact dual-output sub-nanosecond supercontinuum source applicable to ultra-broadband multiplex coherent anti-Stokes Raman scattering microspectroscopy of biological samples. The light source design and the microspectroscopy setup are described in detail. Easy multi-colour imaging of Caenorhabditis elegans nematode is demonstrated and discussed.

    9. Origin of spectral interferences in femtosecond stimulated Raman microscopy (pages 1875–1882)

      E. Ploetz, B. Marx and P. Gilch

      Version of Record online: 25 MAR 2011 | DOI: 10.1002/jrs.2884

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      Simulations (red line) of disturbing interference patterns—observed experimentally (black line) in femtosecond stimulated Raman microscopy (FSRM)—were performed. In the simulation, four-wave mixing (FWM) fields were computed using frequency components of Raman pump and probe pulses as input. Heterodyning of the FWM and probe light results in the interference. The model predicts dependences of the modulation amplitude on light intensities and the nonlinear refractive index n2. These dependences are investigated experimentally.

    10. Ultrafast Raman loss spectroscopy (URLS): instrumentation and principle (pages 1883–1890)

      Babita Mallick, Adithya Lakhsmanna and Siva Umapathy

      Version of Record online: 14 JUN 2011 | DOI: 10.1002/jrs.2996

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      The concept and the design principle of ultrafast Raman loss spectroscopy (URLS), an alternative approach of stimulated Raman spectroscopy, are presented. An experimental finding differentiating URLS from SRS and providing an insight into the origin of the highly intense URLS signals is also reported.

    11. Ultrafast nonlinear spectroscopy of a single silver nanoparticle (pages 1891–1896)

      H. Baida, D. Christofilos, P. Maioli, A. Crut, N. Del Fatti and F. Vallée

      Version of Record online: 11 FEB 2011 | DOI: 10.1002/jrs.2874

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      Time-resolved femtosecond pump-probe spectroscopy of a single metal nanoparticle is used to investigate its size-dependent ultrafast vibrational dynamics.

    12. Raman spectroscopic identification of fullerene inclusions in polymer/fullerene blends (pages 1897–1900)

      Sarah Falke, Pinkie Eravuchira, Arnulf Materny and Christoph Lienau

      Version of Record online: 11 MAY 2011 | DOI: 10.1002/jrs.2966

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      Films of pure P3HT and P3HT : PCBM blends were characterized via absorption and resonant Raman spectroscopy as well as AFM phase imaging. A systematic analysis of the Raman spectra provides evidence that features attributable to PCBM, possible even depending on the charging state of the fullerene molecule, can be observed in P3HT : PCBM blends.

    13. Raman imaging and photodegradation study of phthalocyanine containing microcapsules and coated particles (pages 1901–1907)

      Daniil N. Bratashov, Admir Masic, Alexey M. Yashchenok, Matthieu F. Bedard, Olga A. Inozemtseva, Dmitry A. Gorin, Tamara Basova, Torsten K. Sievers, Gleb B. Sukhorukov, Mathias Winterhalter, Helmuth Möhwald and Andre G. Skirtach

      Version of Record online: 19 APR 2011 | DOI: 10.1002/jrs.2938

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      Raman molecular imaging and AFM are used for studying photodegradation of phthalocyanine containing capsules and coated particles. The influence of laser light on photodegradation kinetics is investigated experimentally. A theoretical model which accounts for these changes is proposed.

    14. Raman-induced Kerr effect spectroscopy of single-wall carbon nanotubes aqueous suspensions in the range 0.1–10 and 100–250 cm−1 (pages 1908–1912)

      A. F. Bunkin and S. M. Pershin

      Version of Record online: 2 MAY 2011 | DOI: 10.1002/jrs.2970

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      In this paper, we study a low (less than 0.1 µg/ml) concentration aqueous suspension of single-wall carbon nanotubes (SWNTs) by Raman-induced Kerr effect spectroscopy (RIKES) in the spectral bands 0.1–10 and 100–250 cm−1. This method is capable of carrying out direct investigation of the SWNT hydration layers. A comparison of RIKES spectra of SWNT aqueous suspension and milli-Q water shows a considerable growth in the intensity of low wavenumber Raman modes. These modes in the 0.1–10 cm−1 range are attributed to the rotational transitions of H2O2 and H2O molecules. We explain the observed intensity increase by the production of hydrogen peroxide and by the formation of a low-density depletion layer on the water–nanotube interface. A few SWNT radial breathing modes (RBM) are observed (ωRBM = 118.5, 164.7 and 233.5 cm−1) in aqueous suspension, which allows us to estimate the SWNT diameters (∼2.0, 1.5, and 1 nm, respectively).