Single-pixel cameras have recently emerged as promising alternatives to multi-pixel sensors due reduced costs and superior durability, which are particularly attractive for mid-infrared (MIR) imaging pertinent applications including industry inspection biomedical diagnosis. To date, MIR single-pixel photon-sparse has yet been realized, urgently calls high-sensitivity optical detectors high-fidelity spatial modulators. Here, we demonstrate a single-photon computational with single-element...

Abstract Frequency upconversion technique, where the infrared signal is nonlinearly translated into visible band to leverage silicon sensors, offers a promising alternation for mid-infrared (MIR) imaging. However, intrinsic field of view (FOV) typically limited by phase-matching condition, thus imposing remaining challenge promote subsequent applications. Here, we demonstrate wide-field imaging based on aperiodic quasi-phase-matching configuration. The acceptance angle significantly expanded...

Abstract The electrochemical reduction of nitrate to ammonia (NO 3 RR) has emerged as a promising but challenging orientation in sustainable development. Cu is one the most effective NO RR catalysts. However, accumulation 2 − on their surface erected bars further improvement efficiency. Herein, Cu‐based electrocatalyst with low‐coordinated atoms (Cu‐LC) synthesized via instantaneous ablation and rapid cooling target by pulse laser proposed new electrocatalyst, which exhibits enhanced...

Abstract Mid-infrared hyperspectral imaging has become an indispensable tool to spatially resolve chemical information in a wide variety of samples. However, acquiring three-dimensional data cubes is typically time-consuming due the limited speed raster scanning or wavelength tuning, which impedes real-time visualization with high spatial definition across broad spectral bands. Here, we devise and implement high-speed, wide-field mid-infrared system relying on broadband parametric...

Quantum memory for flying optical qubits is a key enabler wide range of applications in quantum information science and technology. A critical figure merit the overall storage-and-retrieval efficiency. So far, despite recent achievements efficient memories light pulses, storage has suffered from limited Here we report on polarization that combines an average conditional fidelity above 99% efficiency equal to (68$\pm$ 2)%, thereby demonstrating reversible qubit mapping where more retrieved...

In this work, a 21-carbon dicarboxylic acid (C21DA) and 22-carbon tricarboxylic (C22TA) were prepared by the Diels–Alder addition of tung oil fatty acids with acrylic fumaric acid, respectively, subsequently converted to corresponding di- triglycidyl esters. There no solvents used in glycidylation reactions. The excess epichlorohydrin latter reaction could be recovered reused. Furthermore, for first time, calcium oxide was introduced as water scavenger process effectively avoid side chemical...

We propose and experimentally realize a novel versatile protocol that allows the quantum state engineering of heralded optical coherent-state superpositions. This scheme relies on two-mode squeezed state, linear mixing, n-photon detection. It is optimally using expensive non-Gaussian resources to build up only key part targeted state. In experimental case two-photon detection based high-efficiency superconducting nanowire single-photon detectors, freely propagating exhibits 67% fidelity with...

Optical detectors with single-photon sensitivity and large dynamic range would facilitate a variety of applications. Specifically, the capability extending operation wavelengths into mid-infrared region is highly attractive. Here we implement frequency upconversion detector for counting resolving photons at 3 μm. Thanks to spectrotemporal engineering involved optical fields, could be spectrally translated visible band conversion efficiency 80%. In combination silicon avalanche photodiode,...

Active mid-infrared (MIR) imagers capable of retrieving three-dimensional (3D) structure and reflectivity information are highly attractive in a wide range biomedical industrial applications. However, infrared 3D imaging at low-light levels is still challenging due to the deficiency sensitive fast MIR sensors. Here we propose implement time-of-flight system that operates single-photon sensitivity femtosecond timing resolution. Specifically, back-scattered photons from scene optically gated...

Abstract Sensitive and fast mid‐infrared (MIR) spectroscopy is highly attractive in a variety of applications including astronomical observation, pharmaceutical synthesis, environmental monitoring. However, the performance conventional MIR spectrometers has long been hindered by limited sensitivity narrow‐bandgap detectors and/or deficient brightness broadband light sources. Here, an ultra‐sensitive upconversion spectrometer, which integrates supercontinuum source covering 1.5–4.2 m based on...

Ultrasensitive spectroscopy is an essential component in mid-infrared (MIR) technology. However, the drawbacks of MIR detectors pose challenges to robust at single-photon level. We propose frequency upconversion nonlocally mapping information time domain. Broadband photons from spontaneous parametric downconversion are frequency-upconverted near-infrared band with quantum correlation preservation. Via group delay fiber, spectral within a 1.18-micrometer bandwidth 2.76 3.94 micrometers then...

Non-Gaussian states, and specifically the paradigmatic cat state, are well known to be very sensitive losses. When propagating through damping channels, these states quickly lose their nonclassical features associated negative oscillations of Wigner function. However, by squeezing superposition decoherence process can qualitatively changed substantially slowed down. Here, as a first example, we experimentally observe reduced squeezed optical coherent-state superpositions lossy channel. To...

Transferring quantum information between distant nodes of a network is key capability. This transfer can be realized via remote state preparation where two parties share entanglement and the sender has full knowledge to communicated. Here we demonstrate such process heterogeneous functioning with different encodings, i.e., particle-like discrete-variable optical qubits wave-like continuous-variable ones. Using hybrid light as shared resource, prepare arbitrary coherent-state superpositions...

We report on the experimental implementation of single-frequency fiber-laser pumped mid-infrared (mid-IR) transmitter and receiver modules for free-space communications. These enable frequency upconversion downconversion between 1550-nm telecom wavelength mid-IR, thus providing essential transmission links with mid-IR lasers in 3.6 μm region. Specifically, based difference generation (DFG) MgO-doped periodically poled LiNbO3 (MgO:PPLN), produces 9.3-mW power at 3594 nm 5-W pump 1083 (<10 kHz...

Abstract The generation and manipulation of hybrid entanglement light involving discrete- continuous-variable states have recently appeared as essential resources towards the realization heterogeneous quantum networks. Here we investigate a scheme for remote between particle-like wave-like optical qubits based on non-local heralding photon detection. We also extend this with additional local or detections. An allows resulting state to exhibit higher fidelity targeted entangled while...

Abstract Edge enhanced imaging via the spiral phase contrast enables to reveal or amplitude gradients of a target, which has been proved useful in feature recognition, machine vision, and object identification. A long quest is extend operation wavelength into mid‐infrared (MIR) region, as highly demanded various fields including infrared sensing, astronomic observation, biomedical diagnosis. Here, ultra‐sensitive MIR at single‐photon level based on nonlinear frequency upconversion...

Optical cavities are essential for enhancing the sensitivity of molecular absorption spectroscopy, which finds widespread high-sensitivity gas sensing applications. However, use high-finesse confines wavelength range operation and prevents broader Here, we take a different approach to ultrasensitive namely dual-comb optomechanical spectroscopy (DCOS), by integrating high-resolution multiplexing capabilities with cavity optomechanics through photoacoustic coupling. By exciting molecules...

Abstract Sensitive mid‐infrared (MIR) spectroscopy is highly demanded in various fields ranging from industrial inspection, biomedical diagnosis to astronomical observation. However, the detection sensitivity of conventional MIR spectrometers severely limited by excessive noises for existing infrared sensors, which hinders widespread use photon‐scarce scenarios. Here, a broadband single‐photon time‐stretch spectrometer devised and implemented based on high‐fidelity spectral upconversion...

Abstract Sensitive mid‐infrared (MIR) spectroscopy plays an indispensable role in various photon‐starved conditions. However, the detection sensitivity of conventional MIR spectrometers is severely limited by excessive noises involved infrared sensors, especially for multi‐pixel arrays parallel spectral acquisition. Here, ultra‐sensitive single‐pixel spectrometer devised and implemented, which relies on high‐fidelity upconversion wavelength‐encoding compressive measurement. Specifically, a...

In this paper, we present a method for measuring weak light pulses using single-photon detector, with focus on detecting non-synchronized repetitive pulsed light. The proposed approach, based interval distribution counting, enables accurate reconstruction of both the repetition rate and phase pulses, facilitating determination average photon number pulse width. Specifically, error in reconstructing is below ±0.01%, while per remains ±0.8%.

Abstract The capture of transient optical waveforms is critical to reveal dynamical phenomena in various fields. However, fast and sensitive mid‐infrared (MIR) measurements are typically limited by processing bandwidth detection sensitivity conventional infrared detectors. Here, a computational temporal ghost imaging system proposed implemented, which favors high‐speed high‐sensitivity characterization MIR objects. core process relies on high‐fidelity nonlinear transduction for facilitating...

Electrocatalytic nitrate reduction reaction (eNitRR) plays an essential role in maintaining the nitrogen cycle balance and development of carbon-free energy sources. However, complex processes results the...

We report on high-efficiency superconducting nanowire single-photon detectors based amorphous tungsten silicide and optimized at 1064 nm. At an operating temperature of 1.8 K, we demonstrated a 93% system detection efficiency this wavelength with dark noise few counts per second. Combined cavity-enhanced spontaneous parametric downconversion, fiber-coupled detector enabled us to generate narrowband single photons heralding greater than 90% high spectral brightness 0.6×104 photons/(s·mW·MHz)....

Photoacoustic spectroscopy (PAS) using two optical combs is a new-born technique, offering appealing features, including broad bandwidths, high resolutions, fast acquisition speeds, and wavelength-independent photoacoustic detection, for chemical sensing. However, its further application to, e.g., trace jeopardized due to the fundamentally technically limited sensitivity specificity. Here, we take different route comb-enabled PAS with acoustically enhanced nonlinear spectral hole-burning...