Shashi Prabhakar

TL;DR: In this article, a constrained optimization method was proposed for low photon level interferograms that takes into account the expected redundancy in the unknown phase function, which is shown to have significant noise advantage over traditional methods, such as balanced homodyning or phase shifting, that treat individual pixels in the interference data as independent of each other.

TL;DR: In this paper, the authors present a transverse-spatial mode conversion method based on a unitary mode conversion for measuring any full-field transverse spatial mode, which is error-free and lossless.

TL;DR: In this paper, the authors considered optical beams with phase singularity and experimentally verified that these beams, although classical, have properties of two-mode entanglement in quantum states.

TL;DR: In this article, the authors demonstrate two-photon interference and polarization-entangled photon pairs at 2090 nm using a custom-designed lithium niobate crystal for spontaneous parametric down-conversion and tailored superconducting nanowire singlephoton detectors.

TL;DR: In this article, Hong-Ou-Mandel interference was used for ghost imaging using an anti-symmetric state, engineering the two-photon state symmetry by means of Hong Ou-mandel interference.