IIT Kanpur

Education / Work History

  • Post Doctoral Research Associate, S. N. Bose National Centre for Basic Sciences (2017-present)
  • Ph.D. Scholar, IIT Kanpur (2010-2017)
  • M.Sc., IIT Kanpur

Research Topic / Interest

  • Solvation Dynamics in Deep Eutectic Solvents

Publications

These include only those published in our lab.

  1. Rapid Programmable Pulse Shaping of Femtosecond Pulses at the MHz Repetition Rate. S. Dinda, S. N. Bandyopadhyay, and D. Goswami, OSA Continuum 2(4), 1386 (2019) [Abstract] [PDF] [BibTeX]

    Abstract: We have shown experimentally the successful engineering of femtosecond pulse shaping at a 76 MHz repetition rate input pulse with an acousto-optic modulator (AOM). High repetition rate (HRR) femtosecond laser pulse shaping using an AOM in the Fourier plane was incomprehensible because of its intrinsic 100 kHz acoustic update limit. We demonstrate an effective way of pulse selection and a calibration routine (Fourier shift theorem), which enables generation of ∼10 MHz shaped output pulses from the HRR input pulse train. We have generated a temporally shifted rectangular shaped pulse profile by applying modulation on both the phase and amplitude of the ‘sinc’ RF modulation function.

     BibTeX: @article{dindaRapidProgrammablePulse2019b,
      langid = {english},
      title = {Rapid Programmable Pulse Shaping of Femtosecond Pulses at the {{MHz}} Repetition Rate},
      volume = {2},
      issn = {2578-7519},
      url = {https://my.pcloud.com/publink/show?code=XZDaxr7Z7j2h0Ej5kjfj9pVqlqwvHViq6oeX},
      doi = {10.1364/OSAC.2.001386},
      number = {4},
      journaltitle = {OSA Continuum},
      urldate = {2019-08-01},
      date = {2019-04-15},
      pages = {1386},
      author = {Dinda, Sirshendu and Bandyopadhyay, Soumendra Nath and Goswami, Debabrata}
    }
    
  2. On the Interferometric Coherent Structures in Femtosecond Supercontinuum Generation. S. Dinda, S. N. Bandyopadhyay, and D. Goswami, Appl. Phys. B 122(5), 148 (2016) [Abstract] [PDF] [BibTeX]

    Abstract: We report structured interferometric features in femtosecond supercontinuum generation (FSG) with incident laser powers that are near threshold for FSG. We argue that near threshold, these structures arise from the coherent superposition of pulses that are split initially into two daughter pulses during FSG process. Increase in the input pulse energy generates multiple daughter fragments in the temporal domain to an extent that correlated interference structures are not measurable.

     BibTeX: @article{dindaInterferometricCoherentStructures2016,
      langid = {english},
      title = {On the Interferometric Coherent Structures in Femtosecond Supercontinuum Generation},
      volume = {122},
      issn = {1432-0649},
      url = {https://my.pcloud.com/publink/show?code=XZfaxr7ZhXTWojTzmcfBOA16JDESUyR5fRWV},
      doi = {10/gf5mr5},
      number = {5},
      journaltitle = {Appl. Phys. B},
      urldate = {2019-08-01},
      date = {2016-05-11},
      pages = {148},
      author = {Dinda, Sirshendu and Bandyopadhyay, Soumendra Nath and Goswami, Debabrata}
    }
    
  3. On the Interferometric Coherent Structures in Femtosecond Supercontinuum Generation. S. Dinda, S. N. Bandyopadhyay, and D. Goswami, Applied Physics B 122(5), 148 (2016) [Abstract] [PDF] [BibTeX]

    Abstract: We report structured interferometric features in femtosecond supercontinuum generation (FSG) with incident laser powers that are near threshold for FSG. We argue that near threshold, these structures arise from the coherent superposition of pulses that are split initially into two daughter pulses during FSG process. Increase in the input pulse energy generates multiple daughter fragments in the temporal domain to an extent that correlated interference structures are not measurable.

     BibTeX: @article{dindaInterferometricCoherentStructures2017,
      title = {On the Interferometric Coherent Structures in Femtosecond Supercontinuum Generation},
      author = {Dinda, Sirshendu and Bandyopadhyay, Soumendra Nath and Goswami, Debabrata},
      date = {2016-05-11},
      journaltitle = {Applied Physics B},
      shortjournal = {Appl. Phys. B},
      volume = {122},
      pages = {148},
      issn = {1432-0649},
      doi = {10/gf5mr5},
      url = {https://my.pcloud.com/publink/show?code=XZfaxr7ZhXTWojTzmcfBOA16JDESUyR5fRWV},
      urldate = {2019-08-01},
      annotation = {00000},
      keywords = {_tablet,CCl4,Multiphoton Ionization,Nonlinear Refractive Index,Optical Frequency Comb,Optical Kerr Effect},
      langid = {english},
      number = {5}
    }
    
  4. Rapid Programmable Pulse Shaping of Femtosecond Pulses at the MHz Repetition Rate. S. Dinda, S. N. Bandyopadhyay, and D. Goswami, OSA Continuum 2(4), 1386 (2019) [Abstract] [PDF] [BibTeX]

    Abstract: We have shown experimentally the successful engineering of femtosecond pulse shaping at a 76 MHz repetition rate input pulse with an acousto-optic modulator (AOM). High repetition rate (HRR) femtosecond laser pulse shaping using an AOM in the Fourier plane was incomprehensible because of its intrinsic 100 kHz acoustic update limit. We demonstrate an effective way of pulse selection and a calibration routine (Fourier shift theorem), which enables generation of ∼10 MHz shaped output pulses from the HRR input pulse train. We have generated a temporally shifted rectangular shaped pulse profile by applying modulation on both the phase and amplitude of the ‘sinc’ RF modulation function.

     BibTeX: @article{dindaRapidProgrammablePulse2019,
      title = {Rapid Programmable Pulse Shaping of Femtosecond Pulses at the {{MHz}} Repetition Rate},
      author = {Dinda, Sirshendu and Bandyopadhyay, Soumendra Nath and Goswami, Debabrata},
      date = {2019-04-15},
      journaltitle = {OSA Continuum},
      shortjournal = {OSA Continuum},
      volume = {2},
      pages = {1386},
      issn = {2578-7519},
      doi = {10/gf4gtf},
      url = {https://my.pcloud.com/publink/show?code=XZDaxr7Z7j2h0Ej5kjfj9pVqlqwvHViq6oeX},
      urldate = {2019-08-01},
      annotation = {00000},
      keywords = {_tablet},
      langid = {english},
      number = {4}
    }
    
  5. Vectorial Imaging Techniques for Insights into the Principles of Optical Tweezers. S. Dinda and D. Goswami, Asian Journal of Physics 28(10-12), 989–1013 (2020) [Abstract] [BibTeX]

    Abstract: Optical tweezers work on the principle that microscopic particles may be immobilized by the application of an intense photon flux, which may be attained under tight focusing conditions. To elucidate the behaviour and mechanism of this tweezing action, herein we perform numerical studies and investigate the intensity distribution at the focusing spot under tight focusing conditions. With a high numerical aperture optical lens, the influence of the incident beam polarization on the intensity distribution of focusing spot is very significant. A linearly polarized incident beam induces an asymmetric focusing spot, which is elongated along the polarization direction of the incident beam. The incident beam profile influences the shape of the focusing spot. We show here how introducing an optical mask in front of the optical lens can induce many impressive results; e.g., incident beam modulated by an amplitude mask induces a sub-diffraction limit focusing spot which is relevant to further studies on optical tweezers. We also demonstrate the effects of considering interfaces of different numerical apertures in an optical setup. Thus, we report on the multiple aspects of light-matter interactions for high numerical aperture lens setups, wherein we show through simulations and experiments, the characteristics of such systems that are of use to the broader optics community.

     BibTeX: @article{dindaVectorialImagingTechniques2020,
      title = {Vectorial Imaging Techniques for Insights into the Principles of Optical Tweezers},
      author = {Dinda, Sirshendu and Goswami, Debabrata},
      date = {2020-05-01},
      journaltitle = {Asian Journal of Physics},
      shortjournal = {Asian J. Phys.},
      volume = {28},
      pages = {989--1013},
      number = {10-12}
    }