3 citations · 8 across the 6 of their papers we have counts for
4 papers · 2 filters
Third order nonlinear study of ZnO nano particles under femto-second laser illumination
A. Srinivasa Rao, Gayathri Sethuraman, Oriparambil Sivaraman Nirmal Ghosh +2
ZnO nano particles are synthesized at different percentages of Ag dopant by facile precipitation method. Two photon absorption (2PA) cross-section and nonlinear refractive index of…
Nonlinear Spectroscopic Study of Porphyrin Under cw and Femto-second Laser Pulse Excitation
A. Srinivasa Rao, Alok Sharan, N Venkatramaiah +1
Single Beam Transmittance (SBT) was used as nonlinear spectroscopic tool to investigate the absorption cross-sections and lifetimes of Tetra Phenyl porphyrin (H2TPP) and its OH- gr…
Nonlinear absorption study in four and five energy level systems
A. Srinivasa Rao
Nonlinear absorption in four and five energy level systems have been studied with the aid of steady-state rate equation approach. We report on the tunability of saturable and rever…
Controlled generation, manipulation and frequency conversion of broadband orbital angular momentum spectrum of asymmetric optical vortex beams
Sabir Ul Alam, A. Srinivasa Rao, Anirban Ghosh +2
We report on generation and control of tunable, broad orbital angular momentum (OAM) spectrum of a vortex beam. Using two spiral phase plates (SPPs), we have converted the Gaussian…