Abstract Pixelation occurs in many imaging systems and limits the spatial resolution of acquired images. This effect is notably present quantum experiments with correlated photons which number pixels used to detect coincidences often limited by sensor technology or acquisition speed. Here, we introduce a pixel super-resolution technique based on measuring full spatially-resolved joint probability distribution (JPD) spatially-entangled photons. Without shifting optical elements using prior...

When two indistinguishable photons are each incident on separate input ports of a beamsplitter they `bunch' deterministically, exiting via the same port as direct consequence their bosonic nature. This two-photon interference effect has long-held potential for application in precision measurement time delays, such those induced by transparent specimens with unknown thickness profiles. However, technique never achieved resolutions significantly better than few femtosecond (micron)-scale other...

Three-dimensional (3D) reconstruction of a scene hidden from the direct line sight is an emerging challenge, with applications in defense, security, and surveillance. The authors demonstrate 3D full-color retrieval scene, high-resolution time-of-flight information provided by single-pixel camera. By combining high-efficiency single-photon avalanche diode (SPAD) detector high-refresh-rate digital mirror device (DMD), this technique allows recovery acquisition times less than second, no...

Abstract Spatial correlations between two photons are the key resource in realising many quantum imaging schemes. Measurement of bi-photon correlation map is typically performed using single-point scanning detectors or single-photon cameras based on charged coupled device (CCD) technology. However, both approaches limited speed due to slow and low frame rate CCD-based cameras, resulting data acquisition times order hours. Here, we employ a high rate, avalanche diode (SPAD) camera, measure...

Single-photon light detection and ranging (LiDAR) is a key technology for depth imaging through complex environments. Despite recent advances, an open challenge the ability to isolate LiDAR signal from other spurious sources including background jamming signals. Here we show that time-resolved coincidence scheme can address these challenges by exploiting spatio-temporal correlations between entangled photon pairs. We demonstrate photon-pair-based distill desired information in presence of...

The polarization state of light is a key parameter in many imaging systems. For example, it can image mechanical stress and other physical properties that are not seen with conventional also play central role quantum sensing. However, more difficult to image, polarimetry typically involves several independent measurements moving parts the measurement device. Metasurfaces interleaved designs have demonstrated sensitivity either linear or circular/elliptical states. Here, we present an...

Recent results in deeply subwavelength thickness films demonstrate coherent control and logical gate operations with both classical single-photon light sources. However, quantum processing devices typically involve more than one photon nontrivial input states. Here we experimentally investigate two-photon N00N state absorption a multilayer graphene film. Depending on the phase, it is possible to selectively choose between single- or of These that regime exhibits unique features, opening up...

Quantum entanglement is a key resource that can be exploited for range of applications such as quantum teleportation, computation, and cryptography. However, efforts to exploit in imaging systems have so far led solutions ghost imaging, since found classical implementations. Here, we demonstrate an optical protocol relies uniquely on entanglement: Two polarizing patterns imprinted superimposed metasurface are separately imaged only when using entangled photons. Unentangled light not able...

Multi-photon absorption processes have a nonlinear dependence on the amplitude of incident optical field i.e. number photons. However, multi-photon is generally weak and events occur with extremely low probability. Consequently, it challenging to engineer quantum devices that operate at single photon level majority technologies rely interactions. Here, we demonstrate experimentally theoretically exploiting coherent N = 2 N00N states makes possible enhance two-photon are absorbed. An...

Recent measurements have highlighted that even in vacuum spatially shaped photons travel slower than c, the speed of monochromatic plane waves.Here we investigate intrinsic delay introduced by "twisting" a photon, i.e., introducing orbital angular momentum (OAM), and measure photon time flight with Hong-Ou-Mandel interferometer.When all other parameters are held constant, addition OAM reduces (accelerates) respect to same beam no OAM.We support our results using theoretical method calculate...

Traditional paradigms for imaging rely on the use of a spatial structure, either in detector (pixels arrays) or illumination (patterned light). Removal structure illumination, i.e., with just single-point sensor, would require solving very strongly ill-posed inverse retrieval problem that to date has not been solved. Here, we demonstrate data-driven approach which full 3D information is obtained single-point, single-photon avalanche diode records arrival time photons reflected from scene...

Fluorescence Lifetime Imaging Microscopy in the time domain is typically performed by recording arrival of photons either using electronic tagging or a gated detector. As such temporal resolution limited performance electronics to 100's picoseconds. Here, we demonstrate fluorescence lifetime measurement technique based on photon-bunching statistics with that only dependent duration reference photon laser pulse, which can readily reach 1-0.1 picosecond timescale. A range fluorescent dyes...

Echo-location is a broad approach to imaging and sensing that includes both man-made RADAR, LIDAR, SONAR also animal navigation. However, full 3D information based on echo-location requires some form of scanning the scene in order provide spatial location echo origin-points. Without this information, objects very challenging task as inverse retrieval problem strongly ill-posed. Here, we show temporal encoded return echoes are reflected multiple times within sufficient faithfully render an...

ICCD cameras can record low light events with extreme temporal resolution. Thus, they are used in a variety of bio-medical applications for single photon time flight measurements and LIDAR measurements. In this paper, we present method which allows improvement the resolution down to 10 ps (from native 200 our model), thus placing at better than SPAD direct competition streak cameras. The higher serve tracking visualization information carried time-of-flight

Imaging across both the full transverse spatial and temporal dimensions of a scene with high precision in all three coordinates is key to applications ranging from LIDAR fluorescence lifetime imaging. However, compromises that sacrifice, for example, resolution at expense are often required, particular when 3-dimensional data cube required short acquisition times. We introduce sensor fusion approach combines having low-spatial but gathered single-photon-avalanche-diode (SPAD) array has no...

Researchers experimentally investigate the superluminal kinematics of scattering light sources through ultrafast time-resolved imaging.

This is one of two papers which describe the development and performance a very stable rugged etalon designed for use in Fabry-Perot interferometer, instruments NASA Dynamics Explorer satellite mission, will obtain global measurements thermospheric mesospheric wind temperature with an accuracy ~10 m/sec. The consists flat plates fused silica, spacers constructed Zerodur (a polycrystalline glass ceramic extremely low expansion coefficient) are cemented together using cyanoacrylic adhesives....

Abstract Deeply sub-wavelength two-dimensional films may exhibit extraordinarily strong nonlinear effects. Here we show that 2D the remarkable property of a phase-controllable nonlinearity, i.e., amplitude polarisation wave in medium can be controlled via pump beam phase and determines whether probe will “feel” or not nonlinearity. This is stark contrast to bulk nonlinearities where propagation averages out any such dependence. We perform series experiments multilayer graphene highlight some...

The ability to image through turbid media such as organic tissues, is a highly attractive prospect for biological and medical imaging. This challenging however, due the scattering properties of tissues which scramble information. earliest photons that arrive at detector are often associated with ballistic transmission, whilst later complex paths multiple independent events therefore typically considered be detrimental final formation process. In this work we report on importance these...

Optical Coherence Tomography (OCT) is a key 3D imaging technology that provides micron scale depth resolution for bio-imaging. This substantially surpasses what it typically achieved in Light Detection and Ranging (LiDAR) which often limited to the millimetre due impulse response of detection electronics. However, lack coherence LiDAR scenes, arising from mechanical motion example, make OCT practically infeasible. Here we present quantum interference inspired approach achieves resolutions...

Gathering information of objects hidden from the field view is an extremely relevant problem in many areas science and technology. Some state-of-the-art techniques are able to detect image object behind obstacle at cost high computational processing times. Alternatively, other methods can track real-time without giving on shape. Here we make use a non-scanning ultrashort pulsed light source, Single-Photon Avalanche Diode (SPAD), artificial neural networks (ANNs) demonstrate system that...