Indrajit Bhattacharyya

09 March 2026

• Researchgate

Education / Work History

• Ph.D. Scholar, IIT Kanpur (2010)
• M.Sc., University of Kalyani (2003)
• B.Sc., University of Kalyani (2001)

Thesis Abstract

Femtosecond Non-linear and Thermo-optical Spectroscopy for Studying Chemical Systems

The present thesis focuses on the study of chemical systems with nonlinear and thermo-optical spectroscopic techniques by femtosecond lasers. It includes the construction and alignment details of the each individual optical set ups. Mainly the third order optical nonlinearity and the thermal lens spectroscopic techniques have been utilized to exploit the nature of the chemical systems. Chapter 1 starts with brief historical backgrounds, the basic concepts, general behavioral aspects and different applications of Nonlinear Optical Spectroscopy and Thermo-optical Spectroscopic techniques. In Chapter 2, the description of all the laser systems used during the experiments and the principles and technical details of all the measurement techniques, characterization and calibration of laser pulses in the optical set ups have been provided. In Chapter 3, pulse characterization techniques like FROG and STRUT, which are based on Fourier domain inversion algorithms, have been implemented. A spectral windowing analysis is presented, which shows how to enhance the sensitivity and the resolution of the retrieval schemes at very low signal constraints particularly when the pulses are very weak and complex. In Chapter 4, ultrafast single beam Z-scan technique is used to measure the third order optical response in a series of homologues alcohols at 1560nm, where a frequency optimized optical chopper is used to minimize the thermal corruption arising from the cumulative heating effect in HRR laser systems. The thermal relaxation dynamics of the samples also has been explored by using 1560nm pump and 780nm probe thermal-lens study. Chapter 5 deals with the study of binary liquid mixtures of methanol diluted with carbon tetrachloride, dichloromethane, dimethylsulfoxide and water by Thermo-optical Spectroscopic technique. The deviations between calculated and measured TL trends have been attributed to the molecular properties of the samples under the experimental conditions. In Chapter 6, the effect of isotopic substitution (deuteration) on TL pump-probe signals has been explored by using binary liquid solution of methanol with each of CD3OD, H2O and D2O. The change in the trends of the TL pump-probe signal has been explained in terms of proton transfer behavior of the binary liquid mixtures under the experimental condition.

Research Topic / Interest

Contact me to know my current interests.

Publications

These include only those published in our lab.

1. Decoding Coherent Information in Femtosecond Shaped Laser Pulses. I. Bhattacharyya, A. Dutta, S. Ashtekar, S. K. Maurya, and D. Goswami, CURRENT SCIENCE 99(4), 10 (2010) [BibTeX]

    BibTeX: @article{bhattacharyyaDecodingCoherentInformation2010,
     title = {Decoding Coherent Information in Femtosecond Shaped Laser Pulses},
     author = {Bhattacharyya, Indrajit and Dutta, Aveek and Ashtekar, Sumit and Maurya, Sandeep Kumar and Goswami, Debabrata},
     year = {2010},
     journal = {CURRENT SCIENCE},
     volume = {99},
     number = {4},
     pages = {10},
     langid = {english},
     annotation = {GSCC: 0000001 \\
     00001}
   }
   

2. Effect of Isotope Substitution in Binary Liquids with Thermal-Lens Spectroscopy. I. Bhattacharyya, P. Kumar, and D. Goswami, Chemical Physics Letters 598, 35–38 (2014) [BibTeX]

    BibTeX: @article{bhattacharyyaEffectIsotopeSubstitution2014,
     title = {Effect of Isotope Substitution in Binary Liquids with {{Thermal-Lens}} Spectroscopy},
     author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
     year = {2014},
     month = apr,
     journal = {Chemical Physics Letters},
     volume = {598},
     pages = {35--38},
     issn = {0009-2614},
     doi = {10/f5xrr2},
     urldate = {2019-08-02},
     annotation = {GSCC: 0000009 \\
     8 citations (Crossref) [2024-05-28]\\
     00000}
   }
   

3. Molecular Structure-Property Correlations from Optical Nonlinearity and Thermal-Relaxation Dynamics. I. Bhattacharyya, S. Priyadarshi, and D. Goswami, Chemical Physics Letters 469(1), 104–109 (2009) [BibTeX]

    BibTeX: @article{bhattacharyyaMolecularStructurepropertyCorrelations2009,
     title = {Molecular Structure-Property Correlations from Optical Nonlinearity and Thermal-Relaxation Dynamics},
     author = {Bhattacharyya, Indrajit and Priyadarshi, Shekhar and Goswami, Debabrata},
     year = {2009},
     month = feb,
     journal = {Chemical Physics Letters},
     volume = {469},
     number = {1},
     pages = {104--109},
     issn = {0009-2614},
     doi = {10/cpq233},
     urldate = {2019-08-14},
     annotation = {GSCC: 0000039 \\
     33 citations (Crossref) [2024-05-28]\\
     00024}
   }
   

4. Probing Intermolecular Interaction through Thermal-Lens Spectroscopy. I. Bhattacharyya, P. Kumar, and D. Goswami, The Journal of Physical Chemistry B 115(2), 262–268 (2011) [BibTeX]

    BibTeX: @article{bhattacharyyaProbingIntermolecularInteraction2011,
     title = {Probing {{Intermolecular Interaction}} through {{Thermal-Lens Spectroscopy}}},
     author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
     year = {2011},
     month = jan,
     journal = {The Journal of Physical Chemistry B},
     volume = {115},
     number = {2},
     pages = {262--268},
     issn = {1520-6106},
     doi = {10/d9mz5f},
     urldate = {2019-08-14},
     annotation = {GSCC: 0000040 \\
     30 citations (Crossref) [2024-05-28]\\
     00018}
   }
   

5. Thermal-Lens Spectroscopy in Binary Liquids Mixtures. I. Bhattacharyya, P. Kumar, and D. Goswami, in Frontiers in Optics 2010/Laser Science XXVI (2010), Paper FWX1 (Optical Society of America, 2010), p. FWX1 [BibTeX]

    BibTeX: @inproceedings{bhattacharyyaThermalLensSpectroscopyBinary2010,
     title = {Thermal-{{Lens}} Spectroscopy in Binary Liquids Mixtures},
     booktitle = {Frontiers in {{Optics}} 2010/{{Laser Science XXVI}} (2010), Paper {{FWX1}}},
     author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
     year = {2010},
     month = oct,
     pages = {FWX1},
     publisher = {Optical Society of America},
     doi = {10/gf6c8z},
     urldate = {2019-08-14},
     copyright = {\&\#169; 2010 Optical Society of America},
     langid = {english},
     annotation = {GSCC: 0000040 \\
     0 citations (Crossref) [2024-05-28]\\
     00000}
   }
   

6. Two-Dimensional Imaging of a Second-Order Nonlinear Optical Process. I. Bhattacharyya and D. Goswami, Current Science 112(04), 830 (2017) [BibTeX]

    BibTeX: @article{bhattacharyyaTwoDimensionalImagingSecondOrder2017,
     title = {Two-{{Dimensional Imaging}} of a {{Second-Order Nonlinear Optical Process}}},
     author = {Bhattacharyya, Indrajit and Goswami, Debabrata},
     year = {2017},
     month = feb,
     journal = {Current Science},
     volume = {112},
     number = {04},
     pages = {830},
     issn = {0011-3891},
     doi = {10/f92q98},
     urldate = {2019-08-01},
     langid = {english},
     annotation = {GSCC: 0000182 \\
     1 citations (Crossref) [2024-05-28]\\
     00000}
   }
   

7. Spatiotemporal Control of Degenerate Multiphoton Fluorescence Microscopy with Delay-Tunable Femtosecond Pulse Pairs. D. Das, I. Bhattacharyya, and D. Goswami, Chemical Physics Letters 657, 72–77 (2016) [BibTeX]

    BibTeX: @article{dasSpatiotemporalControlDegenerate2016,
     title = {Spatiotemporal Control of Degenerate Multiphoton Fluorescence Microscopy with Delay-Tunable Femtosecond Pulse Pairs},
     author = {Das, Dhiman and Bhattacharyya, Indrajit and Goswami, Debabrata},
     year = {2016},
     month = jul,
     journal = {Chemical Physics Letters},
     volume = {657},
     pages = {72--77},
     issn = {0009-2614},
     doi = {10/f84rwd},
     urldate = {2019-08-01},
     annotation = {GSCC: 0000003 \\
     3 citations (Crossref) [2024-05-28]\\
     00000}
   }
   

8. Thermal-Lens Spectroscopy in Binary Liquids Mixtures: Effect of Isotope Substitution. P. Kumar, I. Bhattacharyya, and D. Goswami, in Frontiers in Optics 2011/Laser Science XXVII (2011), Paper JTuA25 (Optical Society of America, 2011), p. JTuA25 [BibTeX]

    BibTeX: @inproceedings{kumarThermalLensSpectroscopyBinary2011,
     title = {Thermal-{{Lens Spectroscopy}} in {{Binary Liquids Mixtures}}: {{Effect}} of {{Isotope Substitution}}},
     shorttitle = {Thermal-{{Lens Spectroscopy}} in {{Binary Liquids Mixtures}}},
     booktitle = {Frontiers in {{Optics}} 2011/{{Laser Science XXVII}} (2011), Paper {{JTuA25}}},
     author = {Kumar, Pardeep and Bhattacharyya, Indrajit and Goswami, Debabrata},
     year = {2011},
     month = oct,
     pages = {JTuA25},
     publisher = {Optical Society of America},
     doi = {10/gf5nqg},
     urldate = {2019-08-02},
     copyright = {\&\#169; 2011 Optical Society of America},
     langid = {english},
     annotation = {GSCC: 0000001 \\
     0 citations (Crossref) [2024-05-28]\\
     00000}
   }
   

9. Decoding Coherent Information in Femtosecond Shaped Laser Pulses. I. Bhattacharyya, A. Dutta, S. Ashtekar, S. K. Maurya, and D. Goswami, CURRENT SCIENCE 99(4), 10 (2010) [BibTeX]

    BibTeX: @article{bhattacharyyaDecodingCoherentInformation2011,
     title = {Decoding Coherent Information in Femtosecond Shaped Laser Pulses},
     author = {Bhattacharyya, Indrajit and Dutta, Aveek and Ashtekar, Sumit and Maurya, Sandeep Kumar and Goswami, Debabrata},
     year = {2010},
     journal = {CURRENT SCIENCE},
     volume = {99},
     number = {4},
     pages = {10},
     langid = {english},
     annotation = {GSCC: 0000001 \\
     00001}
   }
   

10. Effect of Isotope Substitution in Binary Liquids with Thermal-Lens Spectroscopy. I. Bhattacharyya, P. Kumar, and D. Goswami, Chemical Physics Letters 598, 35–38 (2014) [BibTeX]

     BibTeX: @article{bhattacharyyaEffectIsotopeSubstitution2015,
      title = {Effect of Isotope Substitution in Binary Liquids with {{Thermal-Lens}} Spectroscopy},
      author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
      year = {2014},
      month = apr,
      journal = {Chemical Physics Letters},
      volume = {598},
      pages = {35--38},
      issn = {0009-2614},
      doi = {10/f5xrr2},
      urldate = {2019-08-02},
      annotation = {GSCC: 0000009 \\
      8 citations (Crossref) [2024-05-28]\\
      00000}
    }
    

11. Molecular Structure-Property Correlations from Optical Nonlinearity and Thermal-Relaxation Dynamics. I. Bhattacharyya, S. Priyadarshi, and D. Goswami, Chemical Physics Letters 469(1), 104–109 (2009) [BibTeX]

     BibTeX: @article{bhattacharyyaMolecularStructurepropertyCorrelations2010,
      title = {Molecular Structure-Property Correlations from Optical Nonlinearity and Thermal-Relaxation Dynamics},
      author = {Bhattacharyya, Indrajit and Priyadarshi, Shekhar and Goswami, Debabrata},
      year = {2009},
      month = feb,
      journal = {Chemical Physics Letters},
      volume = {469},
      number = {1},
      pages = {104--109},
      issn = {0009-2614},
      doi = {10/cpq233},
      urldate = {2019-08-14},
      annotation = {GSCC: 0000039 \\
      33 citations (Crossref) [2024-05-28]\\
      00024}
    }
    

12. Probing Intermolecular Interaction through Thermal-Lens Spectroscopy. I. Bhattacharyya, P. Kumar, and D. Goswami, The Journal of Physical Chemistry B 115(2), 262–268 (2011) [BibTeX]

     BibTeX: @article{bhattacharyyaProbingIntermolecularInteraction2012,
      title = {Probing {{Intermolecular Interaction}} through {{Thermal-Lens Spectroscopy}}},
      author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
      year = {2011},
      month = jan,
      journal = {The Journal of Physical Chemistry B},
      volume = {115},
      number = {2},
      pages = {262--268},
      issn = {1520-6106},
      doi = {10/d9mz5f},
      urldate = {2019-08-14},
      annotation = {GSCC: 0000040 \\
      30 citations (Crossref) [2024-05-28]\\
      00018}
    }
    

13. Thermal-Lens Spectroscopy in Binary Liquids Mixtures. I. Bhattacharyya, P. Kumar, and D. Goswami, in Frontiers in Optics 2010/Laser Science XXVI (2010), Paper FWX1 (Optical Society of America, 2010), p. FWX1 [BibTeX]

     BibTeX: @inproceedings{bhattacharyyaThermalLensSpectroscopyBinary2011,
      title = {Thermal-{{Lens}} Spectroscopy in Binary Liquids Mixtures},
      booktitle = {Frontiers in {{Optics}} 2010/{{Laser Science XXVI}} (2010), Paper {{FWX1}}},
      author = {Bhattacharyya, Indrajit and Kumar, Pardeep and Goswami, Debabrata},
      year = {2010},
      month = oct,
      pages = {FWX1},
      publisher = {Optical Society of America},
      doi = {10/gf6c8z},
      urldate = {2019-08-14},
      copyright = {\&\#169; 2010 Optical Society of America},
      langid = {english},
      annotation = {GSCC: 0000040 \\
      0 citations (Crossref) [2024-05-28]\\
      00000}
    }
    

14. Two-Dimensional Imaging of a Second-Order Nonlinear Optical Process. I. Bhattacharyya and D. Goswami, Current Science 112(04), 830 (2017) [BibTeX]

     BibTeX: @article{bhattacharyyaTwoDimensionalImagingSecondOrder2018,
      title = {Two-{{Dimensional Imaging}} of a {{Second-Order Nonlinear Optical Process}}},
      author = {Bhattacharyya, Indrajit and Goswami, Debabrata},
      year = {2017},
      month = feb,
      journal = {Current Science},
      volume = {112},
      number = {04},
      pages = {830},
      issn = {0011-3891},
      doi = {10/f92q98},
      urldate = {2019-08-01},
      langid = {english},
      annotation = {GSCC: 0000182 \\
      1 citations (Crossref) [2024-05-28]\\
      00000}
    }
    

15. Spatiotemporal Control of Degenerate Multiphoton Fluorescence Microscopy with Delay-Tunable Femtosecond Pulse Pairs. D. Das, I. Bhattacharyya, and D. Goswami, Chemical Physics Letters 657, 72–77 (2016) [BibTeX]

     BibTeX: @article{dasSpatiotemporalControlDegenerate2017,
      title = {Spatiotemporal Control of Degenerate Multiphoton Fluorescence Microscopy with Delay-Tunable Femtosecond Pulse Pairs},
      author = {Das, Dhiman and Bhattacharyya, Indrajit and Goswami, Debabrata},
      year = {2016},
      month = jul,
      journal = {Chemical Physics Letters},
      volume = {657},
      pages = {72--77},
      issn = {0009-2614},
      doi = {10/f84rwd},
      urldate = {2019-08-01},
      annotation = {GSCC: 0000003 \\
      3 citations (Crossref) [2024-05-28]\\
      00000}
    }
    

16. Thermal-Lens Spectroscopy in Binary Liquids Mixtures: Effect of Isotope Substitution. P. Kumar, I. Bhattacharyya, and D. Goswami, in Frontiers in Optics 2011/Laser Science XXVII (2011), Paper JTuA25 (Optical Society of America, 2011), p. JTuA25 [BibTeX]

     BibTeX: @inproceedings{kumarThermalLensSpectroscopyBinary2012,
      title = {Thermal-{{Lens Spectroscopy}} in {{Binary Liquids Mixtures}}: {{Effect}} of {{Isotope Substitution}}},
      shorttitle = {Thermal-{{Lens Spectroscopy}} in {{Binary Liquids Mixtures}}},
      booktitle = {Frontiers in {{Optics}} 2011/{{Laser Science XXVII}} (2011), Paper {{JTuA25}}},
      author = {Kumar, Pardeep and Bhattacharyya, Indrajit and Goswami, Debabrata},
      year = {2011},
      month = oct,
      pages = {JTuA25},
      publisher = {Optical Society of America},
      doi = {10/gf5nqg},
      urldate = {2019-08-02},
      copyright = {\&\#169; 2011 Optical Society of America},
      langid = {english},
      annotation = {GSCC: 0000001 \\
      0 citations (Crossref) [2024-05-28]\\
      00000}
    }