Polarization singularity index sign inversion by a half-wave plate

SK Pal, Ruchi, P Senthilkumaran - Applied Optics, 2017 - opg.optica.org
Inhomogeneous polarization distributions can host polarization singularities such as
lemons, monstars, stars, flowers, spider webs, and higher-order C-points in optical beams …

Perfect chirality with imperfect polarization

B Lang, DPS McCutcheon, E Harbord, AB Young… - Physical Review Letters, 2022 - APS
Unidirectional (chiral) emission of light from a circular dipole emitter into a waveguide is only
possible at points of perfect circular polarization (C points), with elliptical polarizations …

Photonic graph state generation from quantum dots and color centers for quantum communications

A Russo, E Barnes, SE Economou - Physical Review B, 2018 - APS
Highly entangled “graph” states of photons have applications in universal quantum
computing and in quantum communications. In the latter context, they have been proposed …

Engineering chiral light–matter interactions in a waveguide-coupled nanocavity

D Hallett, AP Foster, D Whittaker, MS Skolnick… - ACS …, 2022 - ACS Publications
Spin-dependent, directional light–matter interactions form the basis of chiral quantum
networks. In the solid state, quantum emitters commonly possess circularly polarized optical …

Nonreciprocal transmission and reflection of a chirally coupled quantum dot

DL Hurst, DM Price, C Bentham, MN Makhonin… - Nano Letters, 2018 - ACS Publications
We report strongly nonreciprocal behavior for quantum dot exciton spins coupled to
nanophotonic waveguides under resonant laser excitation. A clear dependence of the …

Unidirectional transmission of single photons under nonideal chiral photon-atom interactions

CH Yan, M Li, XB Xu, YL Zhang, H Yuan, CL Zou - Physical Review A, 2020 - APS
Single-photon transport in nonideal chiral photon-atom interaction structures generally
contains information backflow and thus limits the capabilities to transfer information between …

Unidirectional propagation of single photons realized by a scatterer coupled to whispering-gallery-mode microresonators

CH Yan, M Li, XB Xu, YL Zhang, XY Ma, CL Zou - Physical Review A, 2023 - APS
Coherently manipulating single photons in nanophotonic structures with unidirectional
propagation is one of the central goals for integrated quantum information processing …

Tailoring polarization singularity lattices by phase engineering of three-beam interference

SK Pal, KK Gangwar, P Senthilkumaran - Optik, 2022 - Elsevier
Structured optical lattices obtained from interference of three linearly polarized plane waves
arranged in a cone geometry produce interlaced polarization singularity structures. These …

Index polarity inversion by helicity inversion in Stokes vortices

SK Pal, P Senthilkumaran - Applied Physics Letters, 2020 - pubs.aip.org
To describe the state of polarization (SOP) of light, the Stokes parameters are obtained
using intensity measurements made at different component polarization states. Using these …

Quantum dots as optimized chiral emitters for photonic integrated circuits

J Rosiński, M Gawełczyk, K Tarnowski, P Karwat… - Physical Review B, 2024 - APS
Chiral coupling, which allows directional interactions between quantum dots (QDs) and
photonic crystal waveguide modes, holds promise for enhancing the functionality of …