Sonaly Goswami

Project Scientist

Education / Work History

  • M. Sc., Jadavpur University, Kolkata
  • B. Sc., Jadavpur University, Kolkata

Research Interests

  • Thermal Lens
  • Nonlinear Optics


These include only those published in our lab.

  1. Sensitive Detection of Phase Separation with Femtosecond Thermal Lens Spectroscopy. S. Goswami, S. Singhal, A. Banerjee, and D. Goswami, in 2019 Workshop on Recent Advances in Photonics (WRAP) (2019), pp. 1–2 [Abstract] [BibTeX]

    Abstract: Femtosecond Thermal Lens Spectroscopy (FTLS) has been developed to a level of sensitivity that can have molecule specific response due to convection as demonstrated experimentally and theoretically. Within this framework, we show here that it is possible to use this technique for sensitive detection of liquid versus gas phase. Experimental demonstration is made with a single beam FTLS experiment of traces of iodine in pentane mixture in liquid versus its vapor phase.

     BibTeX: @inproceedings{goswamiSensitiveDetectionPhase2019,
      title = {Sensitive {{Detection}} of {{Phase Separation}} with {{Femtosecond Thermal Lens Spectroscopy}}},
      booktitle = {2019 {{Workshop}} on {{Recent Advances}} in {{Photonics}} ({{WRAP}})},
      author = {Goswami, Sonaly and Singhal, Sumit and Banerjee, Arup and Goswami, Debabrata},
      date = {2019-12},
      pages = {1--2},
      issn = {null},
      doi = {10.1109/WRAP47485.2019.9013833},
      eventtitle = {2019 {{Workshop}} on {{Recent Advances}} in {{Photonics}} ({{WRAP}})},
      keywords = {conduction,convection,Gas versus vapor,Thermal Lens Spectroscopy}
  2. Molecular Size and Mass Sensitive Femtosecond Thermal Spectrometer. S. Singhal, S. Goswami, A. Banerjee, and D. Goswami, in 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) (2019), pp. 1–3 [Abstract] [BibTeX]

    Abstract: Though a single ultrashort pulse has inconceivable thermal effect, highly repetitive femtosecond lasers often result in some heating effects. Instead of fretting over the thermal effect, we have used this to develop the time-resolved photothermal lens spectroscopy for molecular sensitivity.

     BibTeX: @inproceedings{singhalMolecularSizeMass2020,
      title = {Molecular {{Size}} and {{Mass Sensitive Femtosecond Thermal Spectrometer}}},
      booktitle = {2019 {{URSI Asia}}-{{Pacific Radio Science Conference}} ({{AP}}-{{RASC}})},
      author = {Singhal, Sumit and Goswami, Sonaly and Banerjee, A. and Goswami, Debabrata},
      date = {2019-03},
      pages = {1--3},
      doi = {10/gf5mqh},
      eventtitle = {2019 {{URSI Asia}}-{{Pacific Radio Science Conference}} ({{AP}}-{{RASC}})},
      keywords = {_tablet,heating effects,high-speed optical techniques,highly repetitive femtosecond lasers,inconceivable thermal effect,Laser beams,Laser excitation,laser materials processing,lenses,Measurement by laser beam,molecular sensitivity,photothermal effects,Probes,Pulsed laser deposition,Sensitivity,single ultrashort pulse,Spectroscopy}