80 citations · 156 across the 14 of their papers we have counts for
14 papers
Controlling helicity-dependent photocurrent in polycrystalline SbTeSe topological insulator thin films at ambient temperature through wave-vector of and photothermal gradient due to polarized light
Samrat Roy, Subhadip Manna, Chiranjib Mitra +1
Optical control of helicity-dependent photocurrent in topological insulator SbTeSe has been studied at room temperature on dominantly c-axis oriented granular polycrystalli…
Nonlinear optical responses of all-inorganic lead halide perovskite nanostructures by time-resolved beam-deflection technique
Samrat Roy, Arnab Mandal, Akshay Raj R. +2
We have investigated nonlinear refraction in all-inorganic halide perovskites, the CsPbBr and CsPbBrI nanosheet and quantum dot colloids in toluene, by a novel…
How pump-probe differential reflectivity at negative delay yields the perturbed free-induction-decay: Theory of the experiment and its verification
Richarj Mondal, Basabendra Roy, Bipul Pal +1
While time-resolved pump-probe differential reflectivity and transmitivity measurements are routinely used to monitor the population relaxation dynamics on the subpicosecond time s…
Distinguishing quantum dot-like localized states from quantum well-like extended states across the exciton emission line in a quantum well
Sumi Bhuyan, Richarj Mondal, Bipul Pal +1
We have closely examined the emission spectrum at the heavy-hole exciton resonance in a high-quality GaAs multi-quantum well (MQW) sample using picosecond excitation-correlation ph…
Bulk Saturable absorption in Topological Insulator thin Films
Radha Krishna Gopal, Deepak K. S. Ambast, Sourabh Singh +3
We present nonlinear optical absorption properties of pulsed laser deposited thin films of topological insulator (TI), Bi2Se3 on quartz substrate, using open aperture Z - scan tech…
On conversion of luminescence into absorption and the van Roosbroeck-Shockley relation
Rupak Bhattacharya, Bipul Pal, Bhavtosh Bansal
The problem of conversion of experimentally measured luminescence spectrum into the absorption cross section is revisited. The common practice of using the van Roosbroeck-Shockley…