Author

Author

Sort by: Order: Results:

  • Mishra, Sarika; Biswas, Ayan; Patil, Satyajeet; Chandravanshi, Pooja; Mongia, Vardaan; Sharma, Tanya; Rani, Anju; Prabhakar, Shashi; Ramachandran, S.; Singh, Ravindra P. (IOP Publishing, 2022-07)
    Free-space quantum communication assumes importance as it is a precursor for satellite-based quantum communication needed for secure key distribution over longer distances. Prepare and measure quantum key distribution (QKD) ...
  • Chithrabhanu, P.; Aadhi, A.; Gangi Reddy, Salla; Prabhakar, Shashi; Singh, Ravindra P. (Indian Institute of Technology Kharagpur, 2014-12)
    We construct Poincar´e sphere for orbital angular momentum (OAM) states for coherent and partially coherent light beams using a non-separable state generated with modified Sagnac interferometer and a random scatterer.
  • Prabhakar, Shashi; Salla, Gangi Reddy; Ali, Anwar M. A.; Singh, Ravindra P. (The optical society, 2014-12)
    Optical vortices, although being classical, have properties of two-mode entanglement present in quantum states. We have experimentally verified the violation of Bell's inequality using Wigner distribution function for such beams.
  • Prabhakar, Shashi; Salla, Gangi Reddy; Aadhi, A.; Chithrabhanu, P.; Samanta, Goutam Kumar; Singh, Ravindra P. (The opticale society (OAS), 2014-12)
    Optical vortices, although being classical, have properties of two-mode entanglement present in quantum states. We have experimentally verified the violation of Bell's inequality using Wigner distribution function for such beams.
  • Perumangatt, Chithrabhanu; Aadhi, A.; Reddy, Salla Gangi; Prabhakar, Shashi; Singh, R. P. (World Scientific Publishing, 2016-09)
    Using classical laser beams, we generate a general complex superposition state, cebit, of orbital angular momentum (OAM) of light. We use a nonseparable beam of polarization and OAM generated by a modified Sagnac interferometer ...
  • Gangi Reddy, Salla; Prabhakar, Shashi; Ali, Anwar M. A.; Banerji, Jagannath; Singh, Ravindra P. (Indian Institute of Technology Kharagpur, 2014-12)
    We model scattered optical vortices as partially coherent optical vortices (PCOV) as well as Laguerre Gaussian Schell Model beams. A comparison with our experimental results shows the validity of modelling them as PCOV beams
  • Vaity, Pravin; Chithrabhanu, P.; Salla, Gangi Reddy; Prabhakar, Shashi; Singh, Ravindra P. (The Optical Society, 2016-02)
    Vector vortex beams are classified into four types depending upon spatial variation in their polarization vector. We have generated all four of these types of vector vortex beams by using a modified polarization Sagnac ...
  • Salla, Gangi Reddy; Perumangatt, Chithrabhanu; Prabhakar, Shashi; Anwar, Ali; Singh, Ravindra P. (AIP Scitation, 2015-07)
    We generate optical vortices and scatter them through a rough surface. However, the scattered light passing through a lens shows the same vorticity when probed at the Fourier plane. The vorticity is measured using a ...
  • Gangi Reddy, Salla; Chithrabhanu, P.; Prabhakar, Shashi; Aadhi, A.; Singh, Ravindra P. (Indian Institute of Technology, Kharagpur, 2014-12)
    We experimentally demonstrate that the vorticity of light remains preserved even after scattering through a ground glass plate. It shows the robustness of optical vortices along with conservation of orbital angular ...
  • Aadhi, A.; Prabhakar, Shashi; Singh, Ravindra P. (Elsevier, 2015-11)
    We experimentally show that the non-separability of polarization and orbital angular momentum present in a light beam remains preserved under scattering through a random medium like rotating ground glass. We verify this ...
  • Anwar, Ali; Lal, Nijil; Prabhakar, Shashi; Singh, R. P. (IOP Publishing, 2020-11)
    Spatial modes of light directly give the most easily accessible degree of freedom that span an infinite dimensional Hilbert space. The higher dimensional spatial mode entanglement realized using spontaneous parametric down ...
  • Prabhakar, Shashi; Salla, Gangi Reddy; Aadhi, A.; Perumangatt, Chithrabhanu; Samanta, Goutam Kumar; Singh, Ravindra P. (American Physical Society, 2015-08)
    We have considered optical beams with phase singularity and experimentally verified that these beams, although classical, have properties of two-mode entanglement in quantum states. We have observed the violation of Bell's ...
  • Prabhakar, Shashi (Indian Institute of Technology, Gandhinagar, 2014)
    Optical vortices are singularities in the phase distribution of a light field. At the phase singularity, real and imaginary parts of the field vanish simultaneously and associated wavefront becomes helical. For an optical ...

Search Digital Repository


Browse

My Account