Current Work Area

My ongoing research is in the field of Nanophotonics which has emerged as an exciting new arena concerned with the interaction of light with nanostructured materials. My current activities involve:
(a) Modification of Optical fiber with plasmonic nanostructures for sensing application
Plasmonics — a rapidly emerging subdiscipline of nanophotonics exploits both localized and propagating surface plasmons for technologically important applications, specifically in sensing and wave guiding. Our group targets sensing application using optical fiber based plasmonic probes. We modify the surface of the optical fiber with metallic nanostructures either by self-assembly or by physical vapour deposition to excite localized and propagating SPR which in turn depends on the refractive index of the dielectric medium in the proximity of the metallic structures. This dependence is exploited in detection scheme for chemical and biological sensing applications, thus enabling the label-free detection of target molecules in real time and at very low concentrations.
(b) Optical fiber based Nanoantenna : It’s application in tweezing, microscopy and spectroscopy
Optical antennas are devices that convert freely propagating optical radiation into localized energy. They enable the control and manipulation of optical fields at the nanometre scale and hold promise for enhancing the performance and efficiency of photodetection, light emission and sensing. Optical nanoantenna is being fabricated in our lab by chemically etching the tip of the optical fiber and being used for
(i) Manipulating light beam - from Gaussian to Bessel and vortex beam
(ii) Optical tweezing
(iii) Tip-enhanced Raman scattering
(iv) Implementation of the antenna as optical probe for optical imaging instrumentation:
(a) Near field and far field Imaging (Near field scanning optical microscope, Interferrometric scanning optical microscope)
(b) Optical coherence tomography


(a) B.Sc: Bethune College, Kolkata, West Bengal, India
(b) M.Sc: Calcutta University, West Bengal, India
(c) PhD: Saha Insttitute of Nuclear Physics, Kolkata, West Bengal, India (2006)


Patent(s) Filed

Patent(s) Granted

Other Information

Work Experience :
1. Visiting Research Fellow, Max-Planck-Institut für Metallforschung, Stuttgart, Germany (3 months, 2002)
2. Post Doctoral Fellow, Katholieke Universiteit Leuven, Belgium (2006-2008)
3. Visiting scientist, Materials Science Division, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, Tamil Nadu, India (2008-2009)
4. Guest Lecturer, Department of Nanoscience and Nanotechnology, Panjab University, Chandigarh, India (2009-2010)
5. Fellow Scientist, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, India (2010-June 2012)
6. Senior Scientist, CSIR-Central Scientific Instruments Organization (CSIR-CSIO), Chandigarh, India (June 2012-present)

Color styles