KEYWORDS: LIDAR, Stereoscopy, Reconstruction algorithms, Imaging systems, Detection and tracking algorithms, Time correlated single photon counting, Single photon detectors, Sensing systems, Active imaging, Statistical analysis
Laser 3D imaging system has a very wide range of applications, such as satellite remote sensing and airborne surveillance. With the development of single photon detection technology, 3D imaging system based on single photon detection can meet these demanding requirements. In particular, single-photon detectors can provide single-photon sensitivity and ultra-high temporal resolution, and this high sensitivity allows the use of lower power lasers with longer detection distances. In this paper we present an active imaging system based on the single-photon ToF approach to obtain depth profiles of targets. The bistatic system comprised a pulsed laser source with an operational wavelength of 1064nm and an InGaAs/InP SPAD detector array which is highly efficient in the SWIR region.
Exciton-polaritons, hybrid particles composed of photons and excitons, have been identified as a potential solution for the control of light at the nanoscale. This is due to their unique combination of the controllability of excitons and the fast propagation velocity of photons, which enables Bose-Einstein condensation to occur at room temperature. Excitonpolaritons have also been shown to be capable of generating entangled states through parametric scattering, an important aspect for quantum communication and detection. However, conventional resonant pump techniques for generating entangled exciton-polaritons have limitations. In this work, it reports a successful demonstration of inter-band parametric scattering of exciton-polaritons in quasi-one-dimensional ZnO system through the use of an improved angle-resolved fluorescence spectroscopy system. This observation holds significant implications for the study and application of exciton-polaritons in the field of quantum communication and quantum technology.
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