Sunil Kumar, IIT Delhi


- Physics of novel phases of condensed matter systems;

- Light control in photonic structures;

- Ultrafast and nonlinear optical processes;

- THz optics and spectroscopy.

Quick tour to our research activities @ IIT Delhi

Please visit the "Research" and the "Publications" pages for more details about the research work we do.
To know about availability of projects for IITD undergraduate and graduate students, please write an email to
We take PhD students through the routine admission procedure of our department. Find the details on the main page of the Physics Department webpage. If you are interested in doing PhD in our research group, please write to

Laboratory for materials devolopment:

Dedicated laboratory facilities are used for developing interesting material systems for our research. The nanoscale research facility and the central research facility at IIT Delhi house many high end material fabrication and characterization equipments. Various materials synthesis techniques are used by the students in our group for their own research work. More recently, we have created a facility in our lab for developing ultrathin and ultrapure material structures by dc and magnetron sputtering. Currently, this thin film deposition system is being utilitized for developing hetrostrucures of magnetic/nonmagnetic metallic heterostructures for THz applications.

Liquid helium cryostat for low-temperature studies:

This facility has been created in our lab for our interests in various low temperature electrical and optical studies. Students get trained to use this very special tool for their research work. Recently, this particular tool has been used for studying low-temperature physics of carbon nanostructures and topological insulators. This particular device is currently being used in optical to terahertz frequency experiments on solids and two-dimensional materials.

Femtosecond Spectroscopy and Nonlinear Photonics Lab:

Femtosecond laser pulses at the visible and near infrared frequencies are used for exploring the nature of light-matter interaction at ultrafast time scales, exploring nonlinear optical processes in physical/chemical/biological species, and generation of new electromagnetic radiation at much different frequency regions by wave-mixing in certain media. We have recently created this research laboratory at IIT Delhi to cater the needs for ultrafast and nonlinear optics and spectroscopy, THz optics and spectroscopy, nonlinear optical physics, pulse shaping for coherent control, etc. The workhorse for all the above is an amplified femtosecond laser system. It consists of a high-rep rate oscillator, chirped pulse amplifier and an optical parametric amplifier. Currently, experiments developed in-house include femtosecond time-resolved spectrometer, THz time-domain spectrometer, optical pump THz probe time-resolved spectrometer and so on.



Associate Professor: Department of Physics, Indian Institute of Technology Delhi (2020-present)

Assistant Professor: Department of Physics, Indian Institute of Technology Delhi (2015-2020)

Joint Faculty: SeNSE, Indian Institute of Technology Delhi (Nov 2019-2021)

Feinberg Postdoctoral Fellow: Department of Physics of Complex Systems, Weizmann Institute of Science (2012-2015)

Dean of Feculty Fellow: Weizmann Institute of Science (2012-2014)


PhD in Experimental Condensed Matter Physics: Indian Institute of Science Bangalore

Diploma in Advanced Physics: Institute of Physics Bhubaneswar

MSc in Physics: Indian Institute of Technology Delhi

BSc: PDB Govt. PG. College Kotdwara Garhwal (HNBGU, Garhwal University, Uttarakhand)