#Optical expressions free#

#Optical expressions free#

After presenting our design method, we assess the concurrence attained in the cloaks, revealing remarkable enhancements with respect to free space. Both QEs are incoherently pumped, a technologically relevant configuration that has been overlooked in the recent literature on quantum nanophotonics. In particular, we develop a topology-optimization strategy to obtain dielectric cloaks for the QEs that maximize the Wootters concurrence at different inter-emitter distances. In this article, we apply ID ideas to achieve photon-assisted entanglement generation in QE pairs. Thus, initial steps have shown the manipulation of the local density of photonic states and the strength of light–matter interactions, as well as the implementation of single photon extractors and the suppression of inhomogeneous broadening effects in single-photon transducers. Only very recently, ID has been transferred from the classical to the quantum regime, being exploited to tailor nonclassical degrees of freedom of nanophotonic fields. Different implementations of this technique have revealed unexpected and counterintuitive opportunities in areas as different as optical circuitry, second harmonic generation, nanoantennas and metasurfaces. Among the different members of the ID family, topology optimization has contributed greatly to enlarge the design space available for nanoscale optics.

ID algorithms have proven to be very successful at enhancing, refining and optimizing photonic functionalities. These schemes found novel and feasible solutions to the long-standing problem of bipartite entanglement maximization using the material and geometric toolsets accumulated over the years of nanophotonics research.Ĭoncurrently, the development of inverse design (ID) techniques has made a strong impact in nanophotonics research. In this context, much research attention has focused on entanglement formation in pairs of qubits, a paradigmatic building block for any quantum hardware, through their electromagnetic (EM) coupling in different systems: one-dimensional optical fibers, photonic crystal cavities, plasmonic structures, metamaterials and chiral waveguides. Thus, different quantum functionalities exploiting the efficiency and tunability of photon-assisted interactions in networks of quantum emitters (QEs, such as atoms, molecules, quantum dots or point defects in crystals) have been proposed. Lately, the unprecedented control over light at the sub-wavelength scale enabled by nanophotonics has emerged as a promising resource for this purpose. The advent of quantum technologies relies on the design and implementation of physical platforms able to support quantum states involving a large number of elemental quantum systems (qubits).