Deepak Kumar

IIT Kanpur

Education / Work History

  • Ph.D. Scholar, IIT Kanpur (2016-present)
  • M.Sc., Kurukshetra University
  • B.Sc., Kurukshetra University

Research Topic / Interest

My main interest is currently:

  • Optical Tweezer development

Publications

These include only those published in our lab.

  1. Differential Optical Trapping of Nanoparticles with a Single Femtosecond Laser Beam. D. Kumar, A. Singh, K. K. Singh, and D. Goswami, Optical and Quantum Electronics 57(9), 1–18 (2025) [BibTeX] 
     BibTeX: @article{kumarDifferentialOpticalTrapping2025,
  title = {Differential Optical Trapping of Nanoparticles with a Single Femtosecond Laser Beam},
  author = {Kumar, Deepak and Singh, Ajitesh and Singh, Krishna Kant and Goswami, Debabrata},
  year = {2025},
  month = sep,
  journal = {Optical and Quantum Electronics},
  volume = {57},
  number = {9},
  pages = {1--18},
  publisher = {Springer},
  issn = {1572-817X},
  doi = {10.1007/s11082-025-08444-1},
  urldate = {2025-10-30},
  copyright = {2025 The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature},
  langid = {english}
}
  2. Theoretical Investigation on Differential Trapping by Femtosecond Optical Tweezers. D. Kumar, K. K. Singh, A. Singh, and D. Goswami, in Laser Science (Optica Publishing Group, 2024), pp. JTu5A–66 [BibTeX] 
     BibTeX: @inproceedings{kumarTheoreticalInvestigationDifferential2024,
  title = {Theoretical Investigation on Differential Trapping by Femtosecond Optical Tweezers},
  booktitle = {Laser {{Science}}},
  author = {Kumar, Deepak and Singh, Krishna Kant and Singh, Ajitesh and Goswami, Debabrata},
  year = {2024},
  pages = {JTu5A--66},
  publisher = {Optica Publishing Group},
  doi = {10.1364/FIO.2024.JTu5A.66},
  urldate = {2025-03-16},
  langid = {english}
}
  3. Advantage of Femtosecond Optical Tweezers. A. Singh, D. Kumar, K. K. Singh, and D. Goswami, in Frontiers in Optics + Laser Science 2022 (FIO, LS) (2022), Paper JW5A.26 (Optica Publishing Group, 2022), p. JW5A.26 [BibTeX] 
     BibTeX: @inproceedings{singhAdvantageFemtosecondOptical2022,
  title = {Advantage of {{Femtosecond Optical Tweezers}}},
  booktitle = {Frontiers in {{Optics}} + {{Laser Science}} 2022 ({{FIO}}, {{LS}}) (2022), Paper {{JW5A}}.26},
  author = {Singh, Ajitesh and Kumar, Deepak and Singh, Krishna Kant and Goswami, Debabrata},
  year = {2022},
  month = oct,
  pages = {JW5A.26},
  publisher = {Optica Publishing Group},
  doi = {10.1364/FIO.2022.JW5A.26},
  urldate = {2022-12-31},
  copyright = {\copyright{} 2022 The Author(s)},
  langid = {english},
  annotation = {GSCC: 0000000}
}
  4. Comparative Study of Femtosecond and Conventional Optical Tweezers. A. Singh, K. K. Singh, D. Kumar, and D. Goswami, Applied Physics B 131(2), 21 (2025) [BibTeX] 
     BibTeX: @article{singhComparativeStudyFemtosecond2025,
  title = {Comparative Study of Femtosecond and Conventional Optical Tweezers},
  author = {Singh, Ajitesh and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  month = feb,
  journal = {Applied Physics B},
  volume = {131},
  number = {2},
  pages = {21},
  issn = {0946-2171, 1432-0649},
  doi = {10.1007/s00340-024-08372-0},
  urldate = {2025-03-16},
  langid = {english}
}
  5. Comparing Femtosecond Optical Tweezers with Conventional CW Optical Tweezers. A. Singh, K. K. Singh, D. Kumar, and D. Goswami, (arXiv:2408.10451), (2024) [BibTeX] 
     BibTeX: @misc{singhComparingFemtosecondOptical2024,
  title = {Comparing Femtosecond Optical Tweezers with Conventional {{CW}} Optical Tweezers},
  author = {Singh, Ajitesh and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2024},
  month = aug,
  number = {arXiv:2408.10451},
  eprint = {2408.10451},
  primaryclass = {physics},
  publisher = {arXiv},
  doi = {10.48550/arXiv.2408.10451},
  urldate = {2025-03-16},
  archiveprefix = {arXiv},
  langid = {english}
}
  6. Experimental Comparison of Conventional and Femtosecond Optical Tweezers. A. Singh, S. N. Bandyopadhyay, K. K. Singh, D. Kumar, and D. Goswami, in Conference on Lasers and Electro-Optics (2021), Paper JW1A.153 (Optica Publishing Group, 2021), p. JW1A.153 [BibTeX] 
     BibTeX: @inproceedings{singhExperimentalComparisonConventional2021,
  title = {Experimental Comparison of Conventional and Femtosecond Optical Tweezers},
  booktitle = {Conference on {{Lasers}} and {{Electro-optics}} (2021), {{Paper JW1A}}.153},
  author = {Singh, Ajitesh and Bandyopadhyay, Soumendra Nath and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2021},
  month = may,
  pages = {JW1A.153},
  publisher = {Optica Publishing Group},
  doi = {10.1364/CLEO_AT.2021.JW1A.153},
  urldate = {2025-03-19},
  copyright = {\copyright{} 2021 The Author(s)},
  langid = {english}
}
  7. Femtosecond-Laser-Induced Optical Confinement with Ping-Pong Motion. K. K. Singh, A. Singh, D. Kumar, and D. Goswami, Journal of Chemical Physics 163(10), 104202 (2025) [BibTeX] 
     BibTeX: @article{singhFemtosecondlaserinducedOpticalConfinement2025,
  title = {Femtosecond-Laser-Induced Optical Confinement with Ping-Pong Motion},
  author = {Singh, Krishna Kant and Singh, Ajitesh and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  month = sep,
  journal = {Journal of Chemical Physics},
  volume = {163},
  number = {10},
  pages = {104202},
  issn = {0021-9606},
  doi = {10.1063/5.0262340},
  urldate = {2025-10-30},
  langid = {english}
}
  8. Precise Nanoparticle Manipulation Using Femtosecond Laser Trapping. K. K. Singh, D. Kumar, A. Singh, and D. Goswami, Journal of Physical Chemistry Letters 15(41), 10360–10365 (2024) [BibTeX] 
     BibTeX: @article{singhPreciseNanoparticleManipulation2024,
  title = {Precise Nanoparticle Manipulation Using Femtosecond Laser Trapping},
  author = {Singh, Krishna Kant and Kumar, Deepak and Singh, Ajitesh and Goswami, Debabrata},
  year = {2024},
  month = oct,
  journal = {Journal of Physical Chemistry Letters},
  volume = {15},
  number = {41},
  pages = {10360--10365},
  issn = {1948-7185, 1948-7185},
  doi = {10.1021/acs.jpclett.4c01889},
  urldate = {2025-03-16},
  copyright = {https://doi.org/10.15223/policy-029},
  langid = {english}
}
  9. Study of Starch Using Bright Field and Polarized Light Microscopy. K. K. Singh, Y. Yadav, D. Kumar, A. Singh, and D. Goswami, in 2019 Workshop on Recent Advances in Photonics (WRAP) (2019), pp. 1–2 [BibTeX] 
     BibTeX: @inproceedings{singhStudyStarchUsing2019,
  title = {Study of {{Starch Using Bright Field}} and {{Polarized Light Microscopy}}},
  booktitle = {2019 {{Workshop}} on {{Recent Advances}} in {{Photonics}} ({{WRAP}})},
  author = {Singh, Krishna Kant and Yadav, Yogendra and Kumar, Deepak and Singh, Ajitesh and Goswami, Debabrata},
  year = {2019},
  month = dec,
  pages = {1--2},
  issn = {null},
  doi = {10.1109/WRAP47485.2019.9013741},
  annotation = {GSCC: 0000000 \\
  0 citations (Crossref) [2024-05-28]}
}
  10. Unveiling the Role of Molecular Structure in Microscopic Thermodynamics: Insights from Probing Trapped Nanoparticles with Femtosecond Optical Tweezers. A. Singh, D. Mondal, K. K. Singh, D. Kumar, and D. Goswami, ChemNanoMat 11(7), e202500033 (2025) [BibTeX] 
     BibTeX: @article{singhUnveilingRoleMolecular2025,
  title = {Unveiling the Role of Molecular Structure in Microscopic Thermodynamics: Insights from Probing Trapped Nanoparticles with Femtosecond Optical Tweezers},
  shorttitle = {Unveiling the Role of Molecular Structure in Microscopic Thermodynamics},
  author = {Singh, Ajitesh and Mondal, Dipankar and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  journal = {ChemNanoMat},
  volume = {11},
  number = {7},
  pages = {e202500033},
  issn = {2199-692X},
  doi = {10.1002/cnma.202500033},
  urldate = {2025-10-30},
  copyright = {\copyright{} 2025 Wiley-VCH GmbH},
  langid = {english}
}
  11. Differential Optical Trapping of Nanoparticles with a Single Femtosecond Laser Beam. D. Kumar, A. Singh, K. K. Singh, and D. Goswami, Optical and Quantum Electronics 57(9), 1–18 (2025) [BibTeX] 
     BibTeX: @article{kumarDifferentialOpticalTrapping2026,
  title = {Differential Optical Trapping of Nanoparticles with a Single Femtosecond Laser Beam},
  author = {Kumar, Deepak and Singh, Ajitesh and Singh, Krishna Kant and Goswami, Debabrata},
  year = {2025},
  month = sep,
  journal = {Optical and Quantum Electronics},
  volume = {57},
  number = {9},
  pages = {1--18},
  publisher = {Springer},
  issn = {1572-817X},
  doi = {10.1007/s11082-025-08444-1},
  urldate = {2025-10-30},
  copyright = {2025 The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature},
  langid = {english}
}
  12. Theoretical Investigation on Differential Trapping by Femtosecond Optical Tweezers. D. Kumar, K. K. Singh, A. Singh, and D. Goswami, in Laser Science (Optica Publishing Group, 2024), pp. JTu5A–66 [BibTeX] 
     BibTeX: @inproceedings{kumarTheoreticalInvestigationDifferential2025,
  title = {Theoretical Investigation on Differential Trapping by Femtosecond Optical Tweezers},
  booktitle = {Laser {{Science}}},
  author = {Kumar, Deepak and Singh, Krishna Kant and Singh, Ajitesh and Goswami, Debabrata},
  year = {2024},
  pages = {JTu5A--66},
  publisher = {Optica Publishing Group},
  doi = {10.1364/FIO.2024.JTu5A.66},
  urldate = {2025-03-16},
  langid = {english}
}
  13. Advantage of Femtosecond Optical Tweezers. A. Singh, D. Kumar, K. K. Singh, and D. Goswami, in Frontiers in Optics + Laser Science 2022 (FIO, LS) (2022), Paper JW5A.26 (Optica Publishing Group, 2022), p. JW5A.26 [BibTeX] 
     BibTeX: @inproceedings{singhAdvantageFemtosecondOptical2023,
  title = {Advantage of {{Femtosecond Optical Tweezers}}},
  booktitle = {Frontiers in {{Optics}} + {{Laser Science}} 2022 ({{FIO}}, {{LS}}) (2022), Paper {{JW5A}}.26},
  author = {Singh, Ajitesh and Kumar, Deepak and Singh, Krishna Kant and Goswami, Debabrata},
  year = {2022},
  month = oct,
  pages = {JW5A.26},
  publisher = {Optica Publishing Group},
  doi = {10.1364/FIO.2022.JW5A.26},
  urldate = {2022-12-31},
  copyright = {\copyright{} 2022 The Author(s)},
  langid = {english},
  annotation = {GSCC: 0000000}
}
  14. Comparative Study of Femtosecond and Conventional Optical Tweezers. A. Singh, K. K. Singh, D. Kumar, and D. Goswami, Applied Physics B 131(2), 21 (2025) [BibTeX] 
     BibTeX: @article{singhComparativeStudyFemtosecond2026,
  title = {Comparative Study of Femtosecond and Conventional Optical Tweezers},
  author = {Singh, Ajitesh and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  month = feb,
  journal = {Applied Physics B},
  volume = {131},
  number = {2},
  pages = {21},
  issn = {0946-2171, 1432-0649},
  doi = {10.1007/s00340-024-08372-0},
  urldate = {2025-03-16},
  langid = {english}
}
  15. Comparing Femtosecond Optical Tweezers with Conventional CW Optical Tweezers. A. Singh, K. K. Singh, D. Kumar, and D. Goswami, (arXiv:2408.10451), (2024) [BibTeX] 
     BibTeX: @misc{singhComparingFemtosecondOptical2025,
  title = {Comparing Femtosecond Optical Tweezers with Conventional {{CW}} Optical Tweezers},
  author = {Singh, Ajitesh and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2024},
  month = aug,
  number = {arXiv:2408.10451},
  eprint = {2408.10451},
  primaryclass = {physics},
  publisher = {arXiv},
  doi = {10.48550/arXiv.2408.10451},
  urldate = {2025-03-16},
  archiveprefix = {arXiv},
  langid = {english}
}
  16. Experimental Comparison of Conventional and Femtosecond Optical Tweezers. A. Singh, S. N. Bandyopadhyay, K. K. Singh, D. Kumar, and D. Goswami, in Conference on Lasers and Electro-Optics (2021), Paper JW1A.153 (Optica Publishing Group, 2021), p. JW1A.153 [BibTeX] 
     BibTeX: @inproceedings{singhExperimentalComparisonConventional2022,
  title = {Experimental Comparison of Conventional and Femtosecond Optical Tweezers},
  booktitle = {Conference on {{Lasers}} and {{Electro-optics}} (2021), {{Paper JW1A}}.153},
  author = {Singh, Ajitesh and Bandyopadhyay, Soumendra Nath and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2021},
  month = may,
  pages = {JW1A.153},
  publisher = {Optica Publishing Group},
  doi = {10.1364/CLEO_AT.2021.JW1A.153},
  urldate = {2025-03-19},
  copyright = {\copyright{} 2021 The Author(s)},
  langid = {english}
}
  17. Femtosecond-Laser-Induced Optical Confinement with Ping-Pong Motion. K. K. Singh, A. Singh, D. Kumar, and D. Goswami, Journal of Chemical Physics 163(10), 104202 (2025) [BibTeX] 
     BibTeX: @article{singhFemtosecondlaserinducedOpticalConfinement2026,
  title = {Femtosecond-Laser-Induced Optical Confinement with Ping-Pong Motion},
  author = {Singh, Krishna Kant and Singh, Ajitesh and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  month = sep,
  journal = {Journal of Chemical Physics},
  volume = {163},
  number = {10},
  pages = {104202},
  issn = {0021-9606},
  doi = {10.1063/5.0262340},
  urldate = {2025-10-30},
  langid = {english}
}
  18. Precise Nanoparticle Manipulation Using Femtosecond Laser Trapping. K. K. Singh, D. Kumar, A. Singh, and D. Goswami, Journal of Physical Chemistry Letters 15(41), 10360–10365 (2024) [BibTeX] 
     BibTeX: @article{singhPreciseNanoparticleManipulation2025,
  title = {Precise Nanoparticle Manipulation Using Femtosecond Laser Trapping},
  author = {Singh, Krishna Kant and Kumar, Deepak and Singh, Ajitesh and Goswami, Debabrata},
  year = {2024},
  month = oct,
  journal = {Journal of Physical Chemistry Letters},
  volume = {15},
  number = {41},
  pages = {10360--10365},
  issn = {1948-7185, 1948-7185},
  doi = {10.1021/acs.jpclett.4c01889},
  urldate = {2025-03-16},
  copyright = {https://doi.org/10.15223/policy-029},
  langid = {english}
}
  19. Study of Starch Using Bright Field and Polarized Light Microscopy. K. K. Singh, Y. Yadav, D. Kumar, A. Singh, and D. Goswami, in 2019 Workshop on Recent Advances in Photonics (WRAP) (2019), pp. 1–2 [BibTeX] 
     BibTeX: @inproceedings{singhStudyStarchUsing2020,
  title = {Study of {{Starch Using Bright Field}} and {{Polarized Light Microscopy}}},
  booktitle = {2019 {{Workshop}} on {{Recent Advances}} in {{Photonics}} ({{WRAP}})},
  author = {Singh, Krishna Kant and Yadav, Yogendra and Kumar, Deepak and Singh, Ajitesh and Goswami, Debabrata},
  year = {2019},
  month = dec,
  pages = {1--2},
  issn = {null},
  doi = {10.1109/WRAP47485.2019.9013741},
  annotation = {GSCC: 0000000 \\
  0 citations (Crossref) [2024-05-28]}
}
  20. Unveiling the Role of Molecular Structure in Microscopic Thermodynamics: Insights from Probing Trapped Nanoparticles with Femtosecond Optical Tweezers. A. Singh, D. Mondal, K. K. Singh, D. Kumar, and D. Goswami, ChemNanoMat 11(7), e202500033 (2025) [BibTeX] 
     BibTeX: @article{singhUnveilingRoleMolecular2026,
  title = {Unveiling the Role of Molecular Structure in Microscopic Thermodynamics: Insights from Probing Trapped Nanoparticles with Femtosecond Optical Tweezers},
  shorttitle = {Unveiling the Role of Molecular Structure in Microscopic Thermodynamics},
  author = {Singh, Ajitesh and Mondal, Dipankar and Singh, Krishna Kant and Kumar, Deepak and Goswami, Debabrata},
  year = {2025},
  journal = {ChemNanoMat},
  volume = {11},
  number = {7},
  pages = {e202500033},
  issn = {2199-692X},
  doi = {10.1002/cnma.202500033},
  urldate = {2025-10-30},
  copyright = {\copyright{} 2025 Wiley-VCH GmbH},
  langid = {english}
}