Dr. Junaid Masud Laskar


Research Assistant Professor

Dr. Junaid Masud Laskar is a physicist pursuing research at the interface of soft matter photonics, soft matter physics, nanophysics, optical engineering, optics, ultrafast optics and optical technique development. Dr. Junaid has investigated the light-matter interaction, structural transition dynamics, crystallization, particle contact force distribution and mechanics of soft matters (magnetic nanofluid, magnetic emulsion, colloidal gel and granular matter), particularly their interaction with external stimuli (field, stress etc.) at different length scales, using existing experimental techniques (mainly optical) and also by developing new techniques, which also includes the design of optical lens systems (microscope objective lens etc.).

Dr. Junaid has been working as a Research Assistant Professor in SRM Research Institute and Department of Physics and Nanotechnology, SRM University since September 2016. He has developed a light scattering technique to study the structural transitions in magnetic field polarizable soft matters, during his doctoral (Ph.D.) research at Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, India. During his postdoctoral tenure at Max Planck Institute for Polymer Research, Mainz, Germany, he has worked on the “determination of 3D structural topological origin of elasticity in colloidal gel under compressive strain”. During postdoctoral research at Max Planck Institute for Dynamics and Self-Organization, Goettingen, Germany, he has designed and developed a stress resolving two photon fluorescence microscope to measure 3D contact force distribution in hard, frictional granular packing of ruby spheres.

Educational Qualification:

·         Ph.D. , Physics, Indira Gandhi Centre for Atomic Research, Kalpakkam & University of Madras, Chennai, India, 2013

·         M.Sc., Physics, Tezpur University, Tezpur, Assam, India, 2005

·         B.Sc., Physics, Gauhati University, Guwahati, Assam, India, 2003

Professional Experience:

·         Research Assistant Professor, SRM Research Institute and Department of Physics & Nanotechnology, SRM University, Kattankulathur, Tamil Nadu, India, September 2016- Ongoing.

·         Postdoctoral researcher, Max Planck Institute for Dynamics and Self-Organization, Goettingen, Germany, December 2012- August 2016.

·         Postdoctoral Fellow, Max Planck Institute for Polymer Research, Mainz, Germany, December 2011- November 2012.

  • Stimuli responsive tunable soft matter photonics for the development of wavelength tunable random laser.
  • Active dynamics of colloidal particles under the combined influence of magnetic field and space-time varying random potential- for application of optical manipulation, e.g. sorting.
  • Effect of acoustic waves on the 3D contact force distributions in granular media as a model system to understand the effect of seismic waves in seismogenic granular fault of earth crust.

Group leader:  Dr. Junaid Masud Laskar

Ph.D. student:

  • Sabnam A

B. Tech. students:

  • Zindahi [B.Tech. (Biomedical Engineering)]
  • Alexander Samuel [B.Tech. (Chemical Engineering)]

  • “Path length tunable light-matter interaction in magnetic nanofluid based field-induced photonic crystal-glass structure”, J. M. Laskar, B. Raj and J. Philip, New J. Phys. 18, 103037 (2016). Video abstract:  https://www.youtube.com/watch?v=cPQCCzMU2yc
  • “High refractive index immersion liquid for super-resolution 3D imaging using sapphire-based aNAIL optics”, J. M. Laskar, P. S. Kumar, S. Herminghaus, K. E. Daniels, and M. Schröter, Appl. Opt. 55, 3165 (2016)
  • "The effect of suspended Fe3O4 nanoparticle size on magneto-optical Properties of ferrofluids”, S. Brojabasi, T.Muthukumaran,  J. M. Laskar, and J. Philip, Opt. Commun. 336, 278 (2015).
  • “Optical Properties and Applications of Ferrofluids- A review”, J. Philip   and J. M. Laskar, J. of Nanofluids, 1, 3 (2012)
  • “Comparison of light scattering from self -assembled array of nanoparticle chains with cylinders”, J. M. Laskar, S. Brojabasi, B. Raj, and J. Philip, Opt. Commun. 285, 1242 (2012).
  • “Enhanced transmission with tunable Fano-like profile in magnetic nanofluids”, J. M. Laskar, B. Raj, and J. Philip,   Phys. Rev. E 84, 051403 (2011).
  • “Experimental investigation of magnetic-field-induced aggregation kinetics in nonaqueous ferrofluids”, J. M. Laskar, J. Philip, and B. Raj,   Phys. Rev. E 82, 021402 (2010).
  • “Experimental evidence for reversible zippering of chains in magnetic nanofluids under external magnetic fields”, J. M. Laskar, J. Philip, and B. Raj, Phys. Rev. E 80, 041401 (2009).
  • “Observation of discrete localized surface plasmon (LSP) states in isolated nanoscaled Ag-particles synthesized via photochemical reduction route”, J.M.Laskar, D. Mohanta and A. Choudhury, Eur. Phys. J. Appl. Phys. 46, 20602 ( 2009).
  • “Light scattering in a magnetically polarizable nanoparticle suspension”, J. M. Laskar, J. Philip, and B. Raj, Phys. Rev. E 78, 031404 (2008).
  • “Magnetic field induced extinction of light in a  suspension of  Fe3O4 nanoparticles”, J. Philip, J. M. Laskar and B. Raj,  Appl. Phys. Letts. 92, 221911 (2008).
  • “Measurement of thermal diffusivity of solids using continuous heat source and infrared thermography”, J.M.Laskar, S. Bagavathiappan, M. Sardar, T. Jayakumar, J. Philip and B. Raj,  Materials Letters 62, 2740 (2008). 




  • Passionate individuals (Ph.D., Master and undergraduate students) with motivation to work in soft matter photonics are encouraged to contact.

For contact:
Dr. Junaid Masud Laskar
Research Assistant Professor
SRM Research Institute,
R-34, 13th Floor, University Building,
Department of Physics & Nanotechnology,
SRM University
Kattankulathur - 603203
Tamil Nadu, India
Tel (Off): +91-44-27417922
Mob:   +91-7550172981
Email: junaidmasud.b@ktr.srmuniv.ac.in