IIT Kanpur

Education / Work History

  • ONGC (present)
  • Ph.D. Scholar, IIT Kanpur (2015)

Research Topic / Interest

Contact me to know my current interests.

Publications

These include only those published in our lab.

  1. Study of Two Xanthene Dyes Using Spectrally Resolved Three-Pulse Photon Echo Spectroscopy. A. Kumar, S. K. K. Kumar, S. Singhal, and D. Goswami, Current Science 108(10), 1801–1803 (2015) [Abstract] [PDF] [BibTeX]

    Abstract: Comparitive study of the molecular dynamics of two xanthene dye derivatives (Rhodamine-6G and Fluorescein-548) is reported using spectrally resolved three-pulse photon echo spectroscopy. An appreciable change in the coherence and population dynamics was observed between the two xanthene derivatives due to the presence of different functional groups. Solution of Rhodamine-6G in methanol behaves in a more coherent fashion compared to that of Fluorescein-548 dye.

     BibTeX: @article{kumarStudyTwoXanthene2015,
      title = {Study of Two Xanthene Dyes Using Spectrally Resolved Three-Pulse Photon Echo Spectroscopy},
      volume = {108},
      issn = {0011-3891},
      url = {https://www.jstor.org/stable/24905603},
      number = {10},
      journaltitle = {Current Science},
      urldate = {2019-08-01},
      date = {2015},
      pages = {1801-1803},
      author = {Kumar, Ajitesh and Kumar, S. K. Karthick and Singhal, Sumit and Goswami, Debabrata}
    }
    
  2. Spectrally Resolved Photon-Echo Spectroscopy of Rhodamine-6G. A. Kumar, S. K. Karthick, and D. Goswami, Journal of spectroscopy and dynamics 3(1), 2 (2013) [Abstract] [PDF] [BibTeX]

    Abstract: Wavelength dependent study of a laser dye: Rhodamine-6G (Rh6G) by using spectrally resolved photon-echo spectroscopy is presented. The coherence and population dynamics of Rh6G solution in methanol changes as the excitation wavelength is tuned near its absorption maxima of 528 nm. Specifically, the central wavelength of the femtosecond laser pulse was set to 535 nm and to 560 nm while the respective spectra of the photon-echo signals were collected. This gives information on how the ultrafast dynamics of the Rh6G molecule changes with a change in the excitation wavelength.

     BibTeX: @article{kumarSpectrallyResolvedPhotonecho2013,
      title = {Spectrally Resolved Photon-Echo Spectroscopy of {{Rhodamine}}-{{6G}}},
      volume = {3},
      issn = {2249-2704},
      url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3790070/},
      number = {1},
      journaltitle = {Journal of spectroscopy and dynamics},
      shortjournal = {J Spectrosc Dyn},
      urldate = {2019-08-02},
      date = {2013-02},
      pages = {2},
      author = {Kumar, Ajitesh and Karthick, S. K. and Goswami, D.},
      eprinttype = {pmid},
      eprint = {24098869},
      pmcid = {PMC3790070}
    }
    
  3. Spectrally Resolved Femtosecond Photon Echo Spectroscopy of Astaxanthin. A. Kumar, S. K. K. Kumar, A. Gupta, and D. Goswami, in Photonics 2010: Tenth International Conference on Fiber Optics and Photonics (International Society for Optics and Photonics, 2011), 8173, p. 817325 [Abstract] [PDF] [BibTeX]

    Abstract: We have studied the coherence and population dynamics of Astaxanthin solution in methanol and acetonitrile by spectrally resolving their photon echo signals. Our experiments indicate that methanol has a much stronger interaction with the ultrafast dynamics of Astaxanthin in comparison to that of acetonitrile.

     BibTeX: @inproceedings{kumarSpectrallyResolvedFemtosecond2011,
      title = {Spectrally Resolved Femtosecond Photon Echo Spectroscopy of Astaxanthin},
      volume = {8173},
      url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8173/817325/Spectrally-resolved-femtosecond-photon-echo-spectroscopy-of-astaxanthin/10.1117/12.899781.short},
      doi = {10/fs3jxj},
      eventtitle = {Photonics 2010: {{Tenth International Conference}} on {{Fiber Optics}} and {{Photonics}}},
      booktitle = {Photonics 2010: {{Tenth International Conference}} on {{Fiber Optics}} and {{Photonics}}},
      publisher = {{International Society for Optics and Photonics}},
      urldate = {2019-08-02},
      date = {2011-08-23},
      pages = {817325},
      author = {Kumar, Ajitesh and Kumar, S. K. Karthick and Gupta, Aditya and Goswami, Debabrata}
    }
    
  4. Study of Two Xanthene Dyes Using Spectrally Resolved Three-Pulse Photon Echo Spectroscopy. A. Kumar, S. K. K. Kumar, S. Singhal, and D. Goswami, Current Science 108(10), 1801–1803 (2015) [Abstract] [PDF] [BibTeX]

    Abstract: Comparitive study of the molecular dynamics of two xanthene dye derivatives (Rhodamine-6G and Fluorescein-548) is reported using spectrally resolved three-pulse photon echo spectroscopy. An appreciable change in the coherence and population dynamics was observed between the two xanthene derivatives due to the presence of different functional groups. Solution of Rhodamine-6G in methanol behaves in a more coherent fashion compared to that of Fluorescein-548 dye.

     BibTeX: @article{kumarStudyTwoXanthene2016,
      title = {Study of Two Xanthene Dyes Using Spectrally Resolved Three-Pulse Photon Echo Spectroscopy},
      volume = {108},
      issn = {0011-3891},
      url = {https://www.jstor.org/stable/24905603},
      number = {10},
      journaltitle = {Current Science},
      urldate = {2019-08-01},
      date = {2015},
      pages = {1801-1803},
      author = {Kumar, Ajitesh and Kumar, S. K. Karthick and Singhal, Sumit and Goswami, Debabrata}
    }
    
  5. Spectrally Resolved Photon-Echo Spectroscopy of Rhodamine-6G. A. Kumar, S. K. Karthick, and D. Goswami, J Spectrosc Dyn 3(1), 2 (2013) [Abstract] [PDF] [BibTeX]

    Abstract: Wavelength dependent study of a laser dye: Rhodamine-6G (Rh6G) by using spectrally resolved photon-echo spectroscopy is presented. The coherence and population dynamics of Rh6G solution in methanol changes as the excitation wavelength is tuned near its absorption maxima of 528 nm. Specifically, the central wavelength of the femtosecond laser pulse was set to 535 nm and to 560 nm while the respective spectra of the photon-echo signals were collected. This gives information on how the ultrafast dynamics of the Rh6G molecule changes with a change in the excitation wavelength.

     BibTeX: @article{kumarSpectrallyResolvedPhotonecho2014,
      title = {Spectrally Resolved Photon-Echo Spectroscopy of {{Rhodamine}}-{{6G}}},
      volume = {3},
      issn = {2249-2704},
      url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3790070/},
      number = {1},
      journaltitle = {J Spectrosc Dyn},
      urldate = {2019-08-02},
      date = {2013-02},
      pages = {2},
      author = {Kumar, Ajitesh and Karthick, S. K. and Goswami, D.},
      eprinttype = {pmid},
      eprint = {24098869},
      pmcid = {PMC3790070}
    }
    
  6. Spectrally Resolved Femtosecond Photon Echo Spectroscopy of Astaxanthin. A. Kumar, S. K. K. Kumar, A. Gupta, and D. Goswami, in Photonics 2010: Tenth International Conference on Fiber Optics and Photonics (International Society for Optics and Photonics, 2011), 8173, p. 817325 [Abstract] [PDF] [BibTeX]

    Abstract: We have studied the coherence and population dynamics of Astaxanthin solution in methanol and acetonitrile by spectrally resolving their photon echo signals. Our experiments indicate that methanol has a much stronger interaction with the ultrafast dynamics of Astaxanthin in comparison to that of acetonitrile.

     BibTeX: @inproceedings{kumarSpectrallyResolvedFemtosecond2012,
      title = {Spectrally Resolved Femtosecond Photon Echo Spectroscopy of Astaxanthin},
      volume = {8173},
      url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8173/817325/Spectrally-resolved-femtosecond-photon-echo-spectroscopy-of-astaxanthin/10.1117/12.899781.short},
      doi = {10/fs3jxj},
      eventtitle = {Photonics 2010: {{Tenth International Conference}} on {{Fiber Optics}} and {{Photonics}}},
      booktitle = {Photonics 2010: {{Tenth International Conference}} on {{Fiber Optics}} and {{Photonics}}},
      publisher = {{International Society for Optics and Photonics}},
      urldate = {2019-08-02},
      date = {2011-08-23},
      pages = {817325},
      author = {Kumar, Ajitesh and Kumar, S. K. Karthick and Gupta, Aditya and Goswami, Debabrata}
    }