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  • Prof. Shiv Prasad Purohit
Professor
sp.purohit@jiit.ac.in, sppurohitjiit@gmail.com
91-120-25944369 (0)

Education

M.Sc. (Physics) , Ph.D. (Physics)

Biography

Prof. S. P. Purohit did M.Sc. Physics in 1986 from H.N.B. Garhwal University, Srinagar, Uttarakhand. In 1986 he joined research in the area of Atomic and Molecular Collision Physics at University of Roorkee (presently IIT Roorkee) and obtained Ph.D. degree in the year 1992. Subsequently, he continued as research associate CSIR at Physics Department, University of Roorkee and then joined the Theoretical Physics group at Physical Research Laboratory, Ahmedabad in 1994 as a post doctoral fellow for a period of about one year. Prof. Purohit worked as lecturer in Physics at Bareilly College, Bareilly, U. P. and at Kumaon Engineering College, Dwarahat, Uttarakhand Govt. He taught for ten years at Kumaon Engineering College. He joined JIIT as Assistant Professor in 2005 and promoted to the level of associate Professor and Professor at JIIT in 2008 and 2013 respectively. Prof. Purohit has total twenty Nine years of teaching experience since Oct. 1994 and research experience of about thirty seven years since Oct. 1986. He is also working as Controller of Examinations at JIIT, Noida since Jan. 2016.  

The research work performed by Prof. Purohit deals with the electron and positron–atom collisions, the laser–assisted electron–atom scattering, linear and nonlinear optical properties of quantum dots and nanoscience. Presently, he has fifty eight publications including research papers in International Journals of the American Physical Society, American Optical Society, American Scientific Publishers, the European Physical Society, Springer–Verlag, Elsevier, IEEE, NASA, AIP, International, and National Conferences. He is a life member of Indian Physics Association.

Publications

International Journal

  • S. Nasa, and S. P. Purohit, “Quadrupole assisted optical rectification and corresponding refractive index change in GaAs Quantum dot in THz range”, Physica E: Low-dimensional Systems and Nanostructures, Volume 156, 115839 , 2024.
  • S. Nasa, and S. P. Purohit, “Second Order Nonlinear Optical Properties of GaAs Quantum Dots in Terahertz Region”, The European Physical Journal B, Volume 96, 140, 2023.
  • S. Nasa, and S. P. Purohit, “Linear and third order nonlinear optical properties of GaAs quantum dot in terahertz region”, Physica E: Low-dimensional Systems and Nanostructures, Volume 118, 113913, 2020.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Two photon processes in ZnO quantum dots”, Superlattices and Microstructures, 89C, 296, 2016.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Third harmonic and sum-frequency generation in ZnO quantum dots”, Superlattices and Microstructures, 85, 206, 2015.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Quadrupole second harmonic generation and sum-frequency generation in Zno quantum dots”, AIP Advances, 5, 047115, 2015.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Intersublevel photoabsorption and photoelectric processes in ZnO quantum dot embedded in HfO2 and AlN matrix”, Photonics Journal, IEEE, 6, 2600415, 2014.
  • Anchala, S. P. Purohit and K. C. Mathur, “Two photon absorption and photoelectric process in silicon quantum dots embedded in SiO2 and Al2O3 matrix”, Journal of Computational and Theoretical Nanoscience, 11, 2578, 2014.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Quadrupole effects in photoabsorption in ZnO quantum dots”, Journal of Applied Physics, 112, 104323, 2012.
  • Anchala, S. P. Purohit and K. C. Mathur, “Third harmonic generation in intraband transitions of spherical silicon quantum dots”, Journal of Applied Physics,   112, 094306, 2012.
  • Anchala, S. P. Purohit and K. C. Mathur, “Effect of barrier height on linear and nonlinear photoabsorption and refractive index change in Si quantum dots”, Advanced Materials Letters, 3(6), 498, 2012.
  • Anchala, S. P. Purohit and K. C. Mathur, “Nonlinear optical properties of Si nanodot in Al2O3”, IEEE Journal of Quantum Electronics, 48, 628, 2012.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Linear and nonlinear intraband optical properties of ZnO quantum dots embedded in SiO2 matrix”, AIP Advances, 2, 012160, 2012.
  • Anchala, S. P. Purohit and K. C. Mathur, “Linear and nonlinear intersubband optical properties of Si quantum dot embedded in oxide, nitride, and carbide matrix”, Journal of Applied Physics, 110, 114320, 2011.
  • Anchala, S. P. Purohit and K. C. Mathur, “Photoabsorption and photoelectric process in Si nanocrystallites”, Applied Physics Letters, 98,   043106, 2011.
  • S. P. Purohit, and K. C. Mathur, “Study of photoabsorption and photoelectric process in GaAs semiconductor quantum dot nanostructure”, Journal of Computational and Theoretical Nanoscience, 7, 1131, 2010.
  • S. P. Purohit, and K. C. Mathur, “Resonant laser assisted elastic scattering of electrons from lithium and sodium atoms”, Eur. Phys. J. D53, 173-177, 2009.
  • S. P. Purohit, Anoop K. Jain and K. C. Mathur, “Elastic scattering of electrons by metastable hydrogen atoms in the presence of a resonant laser field”, Eur. Phys. J. D, 2, 41, 1998.
  • S. P. Purohit, Anoop K. Jain and K. C. Mathur, “Spin - resolved orientation, depolarization and left - right asymmetry in electron - lithium scattering”, Z. Phys. D30, 135, 1994.
  • S. P. Purohit, and K. C. Mathur, “Study of depolarisation and left-right asymmetry in polarised electrons collision with unpolarised sodium atoms at intermediate energies”, J. Phys. B: At. Mol. Opt. Phys.26, 2443, 1993.
  • S. P. Purohit, and K. C. Mathur, “Electron impact excitation of a metastable hydrogen atom in the presence of a resonant laser field”, Phys. Rev. A, 45, 6502, 1992.
  • Anoop K. Jain, S. P. Purohit, and K. C. Mathur, “Spin-resolved orientation and spin asymmetry in electron - lithium (2s - 3p) excitation”, J. Phys. B: At. Mol. Opt. Phys.25, 1279, 1992.
  • S. P. Purohit, and K. C. Mathur, “Elastic scattering of electrons and positrons by lithium atoms”, Phys. Rev. A42, 2696, 1990.
  • S. P. Purohit, and K. C. Mathur, “On the alignment and spin - resolved orientation in (32s -32p) and (42s - 32p) electron-sodium scattering”, J. Phys. B: At. Mol. Opt. Phys23, L473-L481, 1990.
  • S. P. Purohit, and K. C. Mathur, “Alignment and orientation parameters in positron - sodium resonant scattering”, Phys. Rev. A40, 1817, 1989.
  • S. P. Purohit, and K. C. Mathur, “Polarisation, alignment and spin asymmetry in electron-sodium resonant scattering”, J. Phys. B: At. Mol. Opt. Phys.22,L223, 1989.

National Journals

  1. Anoop K. Jain, S. P. Purohit, and K. C. Mathur, “Photoionization from the excited (3p, 3d, 4s, 4p) states of sodium”, Indian J. Phys.70B(4), 287, 1996.

Book Chapters

  1. S. P. Purohit, “Review on Energy Resources: Views on Uttaranchal”, Dimension of Uttaranchal by C. M. Agrawal, ISBN: 81-7341-318-5, Indian Publishers Distributors Chapter -2, p15 -28, 2004.  

Conference Publications

International Conference Publications

  • S. Nasa, and S. P. Purohit, “Effects of conduction band non-parabolicity and matrix material on THG process in GaAs QD”, Materials Today proceedings Volume xx, PagesXXX, 2023. https://doi.org/10.1016/j.matpr.2023.05.292
  • S. Nasa, and S. P. Purohit, “Photoelectric process in GaAs quantum dot”, Materials Today proceedings Volume 28, Part 1, Pages 350-352, 2020.
  • S. Nasa, and S. P. Purohit, “Effect of Different Oxide Surroundings on Terahertz Radiation Absorption in GaAs Quantum Dot”, AIP Conference Proceedings 2265, 030181, 2020.
  • S. Nasa, and S. P. Purohit, “Terahertz radiation absorption in GaAs quantum dot”, AIP Conference Proceedings 2136, 040009, 2019.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Nonlinear Optical Properties of ZnO/Al2O3 Quantum Dots”, International Conference on Optics & Optoelectronics (ICOL-2014, IRDE Dehradun, 5-8 March) pp-NQQ-6, 2014.
  • Anchala, S. P. Purohit and K. C. Mathur, “Effect of barrier height on nonlinear photoabsorption and refractive index change in Si quantum dots”,  Nanomaterials & Nanotechnology, book of abstracts International Conference on Nanomaterials and Nanotechnology,Delhi University, 18 – 21 Dec., pp. 274, 2011.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur, “Intersubband optical properties of ZnO quantum dots”, The 6th Conference of the Asian Consortium on Computational Materials Science (ACCMS-6, 6–9 September, Singapore) pp. 45, 2011.
  • D. Maikhuri, S. P. Purohit and K. C. Mathur,  “Energy structure and oscillator strength in ZnO quantum dots”, International Conference on Quantum Optics and Quantum Computing (ICQOQC-11, JIIT, 24-26 March) pp. 68, 2011.
  • Anchala, S. P. Purohit and K. C. Mathur, “Effect of surrounding matrix on the photoabsorption in Si quantum dot”, International Conference on Quantum Optics and Quantum Computing (ICQOQC-11, JIIT, 24 - 26 March)pp. 62, 2011.
  • Anchala, S. P. Purohit and K. C. Mathur, “Photoelectric process in Si semiconductor quantum dot nanostructure”, Int. Conf. on Quantum Effects in Solids, Dec. 20 - 23, NPL, New Delhi, pp. 198, 2010.
  • Anchala, S. P. Purohit and K. C. Mathur, “Photoabsorption in Si semiconductor quantum dot nanostructure”, AIP Conf. Proc. 1313International Conference on Physics of Emerging Functional Materials, Sept. 22-24, BARC, Mumbai, India, pp. 230, 2010.
  • Anchala, S. P. Purohit and K. C. Mathur, “Photoabsorption in Si semiconductor quantum dot nanostructure”, Book of Abstracts International Conference on Physics of Emerging Functional Materials, Sept. 22-24, BARC, Mumbai, India, pp. 95, 2010.
  • S. P. Purohit, and K. C. Mathur, “Photoexcitation of GaAs semiconductor quantum dot, Proc. XXVI International Conference on Photonic”, Electronic and Atomic Collisions, Kalamazoo, Michigan, USA, July 22 – 28 pp. Mo168, 2009.
  • S. P. Purohit, and K. C. Mathur, “Resonant laser assisted elastic scattering of electrons by lithium atoms”, Proc. XXV International Conference on Photonic, Electronic and Atomic Collisions, Freiburg, Germany, July 25 – 31, 2007.
  • S. P. Purohit, and K. C. Mathur, “Asymmetry in elastic scattering of electrons by sodium atoms”, Proc. XXIV International Conference on Photonic, Electronic and Atomic Collisions, Rosario, Argentina, July 20 – 26 pp.Mo037, 2005.
  • Anoop K. Jain, S. P. Purohit, and K. C. Mathur, ”Two photon ionization from the initial excited (42S) state of sodium”, Proc. XIX International Conference on Photonic, Electronic and Atomic Collisions, Whistler, Canada, July 26 – August 1, pp. 649, 1995.
  • Purohit, S. P., Anoop K. Jain, and Mathur, “Elastic scattering of electrons by metastable hydrogen atoms in the presence of a resonant laser field”, Proc. XVIII International Conference on Photonic, Electronic and Atomic Collisions, Aarhus, Denmark, July 21 - 27 pp. 727, 1993.
  • Anoop K. Jain, S. P. Purohit, and K. C. Mathur, “Photoionization of the excited (42P) state of sodium”, XVIII ICPEAC, Aarhus, Aarhus, Denmark, July 21 - 27 pp. 29, 1993.
  • S. P. Purohit, Anoop K. Jain, and K. C. Mathur, “Spin - resolved orientation , depolarization and left - right asymmetry in electron - lithium scattering”, Proc. 7th Int. Symposium on Polarization and Correlation in Atomic Collisions, Univrsitat Bielefeld ( Germany) July 29 - 31 pp. 5, 1993.
  • Anoop K. Jain, S. P. Purohit, and K. C. Mathur, “Alignment spin - resolved orientation and spin asymmetry in electron - lithium (22s -32p) excitation”, Proc. XVII   ICPEAC, Brisbane (Australia), July 10 - 16 pp. 112, 1991.
  • S. P. Purohit, and K. C. Mathur, “Inelastic scattering of positrons with sodium”, Annihilation in Gases and Galaxies, NASA Pub. 3058, ed. R. J. Drachman, (NASA, Washington, DC, pp33, 1990.
  • S. P. Purohit, and K. C. Mathur, “Study of alignment and orientation parameters in positron impact excitation of sodium atom”, Proc. XVI  ICPEAC, New York (U.S.A.), July 26 - Aug. pp. 423, 1989.
  • S. P. Purohit, and K. C. Mathur, “Elastic scattering of spin - polarised electrons with spin - polarised lithium atoms”, Proc. XVI  ICPEAC, New York (U.S.A.) July 26 - Aug 1 pp. 177, 1989.
  • National Conference Publications
  • S. P. Purohit, S. Saxena and K. C. Mathur, “Alignment and orientation in positron lithium ( 2s - 3p ) excitation”, Proc. X NWAMP, Ch. Charan Singh University, Meerut, March 7 - 11 pp. 46, 1995.
  • S. P. Purohit, and K. C. Mathur () “Depolarization in polarized electrons elastically scattered from lithium atoms”, Proc. IX NWAMP, BARC Bombay, Dec. 11 - 18 pp. 113, 1992.
  • S. P. Purohit, and K. C. Mathur, “Laser assisted electron impact excitation of metastable hydrogen atoms”, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 – 12 pp. 129, 1990.
  • S. P. Purohit, and K. C. Mathur, “Alignment and spin dependent orientation in electron - sodium scattering”, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 – 12 pp. 39, 1990.
  • Anoop K. Jain, S. P. Purohit, and K. C. Mathur, “Elastic scattering of electrons by sodium atoms”, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 - 12pp. 31, 1990.
  • S. P. Purohit, and K. C. Mathur, “Polarization and correlation in electron - sodium resonant scattering”, Proc. VII NWAMP, A.M.U. Aligarh, Dec. 12 - 17 pp. 8, 1988.
  • S. P. Purohit, (2000) “Review on energy resources: Prospectives to Uttrakhand”, Proc. National Seminar on TDRAC, K.E.C. Dwarahat, April 28 - 29 pp. IV-2, 2000.