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Jaypee Institute of Information Technology, Noida
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  • Prof. S. P. 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. He taught for ten years at Kumaon Engineering College. He joined JIIT as Assistant Professor in 2005. Prof. Purohit has total teaching and research experience of about thirty years. 

The research work performed by Prof. Purohit deals with the electron and positron–atom collisions, the laser–assisted electron–atom scattering, and nanoscience. Presently, he has fifty one 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, NASA, AIP, International, and National Conferences. He is a life member of Indian Physics Association.

Publications

International Journal

  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C. (2016), Two photon processes in ZnO quantum dots, Superlattices and Microstructures, 89C, 296.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C.  (2015), Third harmonic and sum-frequency generation in ZnO quantum dots, Superlattices and Microstructures, 85, 206.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C.  (2015), Quadrupole second harmonic generation and sum-frequency generation in Zno quantum dots, AIP Advances, 5, 047115.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C. (2014), Intersublevel photoabsorption and photoelectric processes in ZnO quantum dot embedded in HfO2 and AlN matrix, Photonics Journal, IEEE, 6, 2600415.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2014), Two photon absorption and photoelectric process in silicon quantum dots embedded in SiO2 and Al2O3 matrix, Journal of Computational and Theoretical Nanoscience, 11, 2578.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C.  (2012), Quadrupole effects in photoabsorption in ZnO quantum dots, Journal of Applied Physics, 112, 104323.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2012), Third harmonic generation in intraband transitions of spherical silicon quantum dots, Journal of Applied Physics,   112, 094306.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2012), Effect of barrier height on linear and nonlinear photoabsorption and refractive index change in Si quantum dots, Advanced Materials Letters, 3(6), 498.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2012), Nonlinear optical properties of Si nanodot in Al2O3, IEEE Journal of Quantum Electronics, 48, 628.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C.  (2012), Linear and nonlinear intraband optical properties of ZnO quantum dots embedded in SiO2 matrix, AIP Advances, 2, 012160. 
  • Anchala,Purohit, S. P. and Mathur, K. C. (2011), Linear and nonlinear intersubband optical properties of Si quantum dot embedded in oxide, nitride, and carbide matrix, Journal of Applied Physics, 110, 114320.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2011), Photoabsorption and photoelectric process in Si nanocrystallites, Applied Physics Letters, 98,   043106.
  • Purohit, S. P.and Mathur, K. C. (2010), Study of photoabsorption and photoelectric process in GaAs semiconductor quantum dot nanostructure, Journal of Computational and Theoretical Nanoscience, 7, 1131.
  • Purohit, S. P.and Mathur, K. C. (2009), Resonant laser assisted elastic scattering of electrons from lithium and sodium atoms, Eur. Phys. J. D53, 173-177.
  • Purohit, S. P., Jain, Anoop K. and Mathur, K. C. (1998) Elastic scattering of electrons by metastable hydrogen atoms in the presence of a resonant laser field,Eur. Phys. J. D, 2, 41.
  • Purohit, S. P., Jain, Anoop K. and Mathur, K. C. (1994) Spin - resolved orientation, depolarization and left - right asymmetry in electron - lithium scattering, Z. Phys. D30, 135.
  • Purohit, S. P.and Mathur, K. C. (1993) 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.
  • Purohit, S. P.and Mathur, K. C. (1992) Electron impact excitation of a metastable hydrogen atom in the presence of a resonant laser field, Phys. Rev. A, 45, 6502.
  • Jain, Anoop K., Purohit, S. P., and Mathur, K. C. (1992) Spin-resolved orientation and spin asymmetry in electron - lithium (2s - 3p) excitation,J. Phys. B: At. Mol. Opt. Phys.25, 1279.
  • Purohit, S. P.and Mathur, K. C. (1990) Elastic scattering of electrons and positrons by lithium atoms, Phys. Rev. A42, 2696.
  • Purohit, S. P.and Mathur, K. C. (1990) 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.
  • Purohit, S. P.and Mathur, K. C. (1989) Alignment and orientation parameters in positron - sodium resonant scattering, Phys. Rev. A40, 1817.
  • Mathur, K. C. and Purohit, S. P. (1989) Polarisation, alignment and spin asymmetry in electron-sodium resonant scattering, J. Phys. B: At. Mol. Opt. Phys.22,L223.

National Journals

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

International Conferences

  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C. (2014) Nonlinear Optical Properties of ZnO/Al2O3 Quantum Dots, International Conference on Optics & Optoelectronics (ICOL-2014, IRDE Dehradun, 5-8 March) pp-NQQ-6.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2011) 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.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C. (2011) 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.
  • Maikhuri, Deepti,Purohit, S. P. and Mathur, K. C. (2011) 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.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2011) 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.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2010) Photoelectric process in Si semiconductor quantum dot nanostructure, Int. Conf. on Quantum Effects in Solids, Dec. 20 - 23, NPL, New Delhi, pp. 198.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2010) 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.
  • Anchala,Purohit, S. P. and Mathur, K. C. (2010) 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.
  • Purohit, S. P.and Mathur, K. C. (2009) Photoexcitation of GaAs semiconductor quantum dot, Proc. XXVI International Conference on Photonic, Electronic and Atomic Collisions, Kalamazoo, Michigan, USA, July 22 – 28 pp. Mo168.
  • Purohit, S. P.and Mathur, K. C. (2007) 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.
  • Purohit, S. P.and Mathur, K. C. (2005) 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.
  • Jain, Anoop K., Purohit, S. P., and Mathur, K. C. (1995)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.
  • Purohit, S. P.,Jain, Anoop K., and Mathur, K. C. (1993) 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.
  • Jain, Anoop K., Purohit, S. P., and Mathur, K. C. (1993) Photoionization of the excited (42P) state of sodium, XVIII ICPEAC, Aarhus,Aarhus, Denmark, July 21 - 27 pp. 29.
  • Purohit, S. P.,Jain, Anoop K., and Mathur, K. C. (1993) 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.
  • Jain, Anoop K., Purohit, S. P., and Mathur, K. C. (1991) Alignment spin - resolved orientation and spin asymmetry in electron - lithium (22s -32p)  excitation, Proc. XVII   ICPEAC, Brisbane (Australia), July 10 - 16 pp. 112.
  • Purohit, S. P.and Mathur, K. C. (1990) Inelastic scattering of positrons with sodium, Annihilation in Gases and Galaxies, NASA Pub. 3058, ed. R. J. Drachman, (NASA, Washington, DC, pp33.
  • Purohit, S. P.and Mathur, K. C. (1989) 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.
  • Purohit, S. P.and Mathur, K. C. (1989) 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.

National Conferences

  • Purohit, S. P., Saxena, S.and Mathur, K. C. (1995) Alignment and orientation in positron lithium ( 2s - 3p ) excitation, Proc. X NWAMP, Ch. Charan Singh University, Meerut, March 7 - 11 pp. 46.
  • Purohit, S. P.and Mathur, K. C. (1992)Depolarization in polarized electrons elastically scattered from lithium atoms, Proc. IX NWAMP, BARC Bombay, Dec. 11 - 18 pp. 113.
  • Purohit, S. P.and Mathur, K. C. (1990) Laser assisted electron impact excitation of metastable hydrogen atoms, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 – 12 pp. 129.
  • Purohit, S. P.and Mathur, K. C. (1990) Alignment and spin dependent orientation in electron - sodium scattering, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 – 12 pp. 39.
  • Jain, Anoop K., Purohit, S. P., and Mathur, K. C. (1990) Elastic scattering of electrons by sodium atoms, Proc. VIII NWAMP, University of Hyderabad, Hyderabad, Dec. 6 - 12pp. 31.
  • Purohit, S. P.and Mathur, K. C. (1988) Polarization and correlation in electron - sodium resonant scattering, Proc. VII NWAMP, A.M.U. Aligarh, Dec. 12 - 17 pp. 8.
  • Purohit, S. P. (2000)Review on energy resources: Prospectives to Uttrakhand, Proc. National Seminar on TDRAC, K.E.C. Dwarahat, April 28 - 29 pp. IV-2.

Book Chapter

  1. Purohit, S. P., “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.