Dr. T. K. Thirumalaisamy

Dr. T. K. Thirumalaisamy
Associate Professor, Department of Physics
H.K.R.H. College, Uthamapalayam
Mobile: +91 9486506453, Email: tktsamy67@gmail.com

Ph.D. Topic:

XRD Characterization of non-linear Optical Materials

Date of Regis: 04.06.2009
Reg. No. P8419
Viva-Voce date: 10.04.2018

Introduction about Ph.D. work:

Non-linear optical materials are of widespread interest for opto-electronic applications such as telecommunication, optical storage, and optical computing. The understanding of the electron density distribution of the non-linear optical materials is an utmost important thing for their potential applications. In this doctoral work, a detailed analyses of the structural properties, elucidation of the electron density distribution, optical properties, morphological properties, and the elemental composition of some non-linear optical materials only (not as the characterization of non-linear properties of the optical materials) have been carried out for the first time, using the powder X-ray diffraction (PXRD), UV-Visible spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) have been carried out. These charge density analyses provide microscopic details on the charge distribution in the unit cell and the varied behavior of the material by the substitution of the dopants.

Materials interest:

Non-linear optical materials

Lead molybdate (PbMoO4)

Lithium niobate (LiNbO3)

Ce doped Gadolinium gallium garnet (Ce:Gd3Ga5O12)

Calcite (CaCO3)

Yb doped Calcium fluoride (Yb:CaF2)

Al2O3, Cr:Al2O3 and V:Al2O

List of Publications:

  1. Effect of the energy-dependent effective mass on ionized-impurity-scattering-limited mobility in gallium arsenide,                                                                                                                                      T. K. Thirumalaisamy and D. Chandramohan,                                                                                      Phys. Rev. B, Vol. 44, 6158-6160, 1991.(American Physical Society)
  2. Local structural analysis of Al2O3, Cr:Al2O3 and V:Al2O3 using Powder XRD,T. K. Thirumalaisamy, K. J. Lakshmi Sri and R.Saravanan,                                                                                                          Materials Science Forum, Vol. 671, pp. 131-152, 2011. (Trans. Tech. Publications) Impact factor : 0.56
  3. Charge density in MoO4 tetrahedron and PbO8 octahedron in PbMoO4,T. K. Thirumalaisamy and R. Saravanan,                                                                                                                                              Journal of Materials Science: Materials in Electronics, Vol. 22, pp. 1637-1648, 2011. (Springer Publication)  Impact factor : 2.195
  4. Local structure determination of the nonlinear optical material LiNbO3 using XRD,R. Saravanan, T. K. Thirumalaisamy and T. Kajitani,                                                                                Physica Status Solidi A, Vol. 208(11), pp. 2643–2650, 2011. (WILEY-VCH Publication) Impact factor : 1.469
  5. Electronic Charge Density Distributions in Sb2O3,T. K. Thirumalaisamy, S. Saravanakumar and R. Saravanan,                                                                                                                                                Novel Ceramic Materials, Vol. 2, pp. 93-107, 2015, Materials Research Foundations)
  6. The redistribution of charge density in CaF2:Yb3+T. K. Thirumalaisamy, R. Saravanan and S. Saravanakumar,                                                                                                                                       Journal of Materials Science: Materials in Electronics, Vol. 26(9), pp. 6683–6691, 2015. (Springer Publication)  Impact factor : 2.195
  7. Charge Density Distribution and Bonding in Calcite,T. K. Thirumalaisamy, S. Saravanakumar and R. Saravanan,                                                                                                                                            Novel Ceramic Materials, Vol. 2, pp. 128-146, 2015. (Materials Research Foundations)
  8. Structure and charge density of Ce doped gadolinium gallium garnet(GGG),                                    T. K. Thirumalaisamy, S. Saravanakumar, Skirmante Butkute, Aivaras Kareiva and R. Saravanan, Journal of Materials Science: Materials in Electronics, Vol. 27(2), pp. 1920–1928, 2016. (Springer Publication) Impact factor : 2.195

    (Left to right) Mrs. R.A.J.R.Sheeba, Mrs. Thirumalaisamy, Mr. T.K.Thirumalaisamy, Dr. M. Charles Robert, Dr. S. Sankaranarayanan, Dr. R. Saravanan, Mrs. Saravanan, Dr. M. Premarani, Mrs. J. Mangayarkkarasi, Mrs. G. Gowri, Dr. T. Thenmozhi, Mrs. S. V. Meenakshi
    (Standing back row) Mr. S. Sonai, Mr. S. Sasikumar, Mr. O.V. Saravanan. Master S. Karthik Sivaram