In our group we study the physics of light matter interaction and the pulse dynamics in nonlinear waveguides. We theoretically model the optical wave dynamics and perform the related experiments. We explore new kind of waveguides like photonic crystal fiber, Si on insulator, cavity resonator etc. Few key tpoic of our research is as follows,

Ultrafast Optics & Solitons
Optical bullet, Spatio-temporal soliton
Optical similaritons & Dissipative Solitons
Soliton in periodic waveguide: Gap soliton
Silicon Photonics
Photonic Crystal Fibers
Supercontinuum generation
Fiber Bragg Grating
Nano-structured waveguides, Nano-photonics
Nonlinear optics in periodic structure: Slow light
Plasmonics
Transformation Optics
Optical Rogue waves

All Publications

Optical beam propagation inside a graded-index fiber with saturable nonlinearity by Das T., Lara A. P., Roy S. , Agrawal G. P. PHYSICAL REVIEW A 113 043514- (2026)
Design and fabrication of microstructured optical fibers with optimized core suspension for enhanced supercontinuum generation by D. Ghosh, S. Bose, S. Roy and S.K Bhadra Journal of Lightwave Technology (IEEE) 33 - (2015)
Dissipative soliton molecules in active random metamaterials by Paul A., Marini A. , Roy S. Phys Rev A 063501- (2024)
Dissipative soliton mediated radiations in active silicon-based waveguides by Roy S., Sahoo A. Journal of Optical Society of America B 35 257-265 (2018)
Self-healing dynamics and absolute temporal focusing of a truncated Airy pulse under higher-order phase modulations by Banerjee A., Roy S. JOSA B 35 878-885 (2018)
Perturbed dissipative solitons: A variational approach by Sahoo A., Roy S. , Agrawal G. P. Phys. Rev. A 96 013838- (2017)
Implications of a zero-nonlinearity wavelength in photonic crystal fibers doped with silver nanoparticles by Bose S., Sahoo A. , Chattopadhyay R. , Roy S. , Bhadra S. K., Agrawal G. P. Phys. Rev. A 94 043835- (2016)
Study of nonlinear dynamics in silvernanoparticle- doped photonic crystal fiber by SURAJIT BOSE, RIK CHATTOPADHYAY SAMUDRA ROY, AND SHYAMAL K. BHADRA Journal of optical society of America B 33 - (2016)