Search Results - "APL Photonics"

Silicon photonics has emerged as a transformative solution to address the energy and bandwidth challenges of modern computing and communication systems. While integrating diverse materials with silicon has enhanced the functionality of photonic integrated circuits, these hybrid approaches often face...

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Optical displacement sensors are widely employed in various fields due to their broad measurement range, high resolution, and exceptional precision. However, their sensitivity and measurement accuracy are inherently limited by the frequency stability of the laser source. In this work, we propose an...

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Laser irradiated nanostructures generate nanoplasmas with ultrahigh energy densities, yet retrieving their three-dimensional (3D) spatial distribution remains challenging due to ion expansion and loss of original spatial information. In this study, we introduce a momentum-to-position mapping method...

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The pumping of photoluminescent dye to emit in a cholesteric liquid crystal (CLC)-host is characterized by advanced tunable magnitude and phase, and the incorporation of nanomaterials into CLC-hosts results in the enhancement of emission. Herein, we prepared hetero-structured NiO/ZnO nanoparticles (...

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Polarization entanglement of single photons is a key element to enable quantum 2.0 applications, such as quantum computing, quantum networks, and quantum sensing. Verification and fidelity assessment of the entanglement state are typically performed by sequential coincidence measurements with single...

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Fluorescence microscopy is expected to be a reliable technique for bioprocess analysis, but the current single, deterministic imaging cannot objectively reflect the inherent observation errors caused by instruments and algorithms. For structured illumination microscopy (SIM) used for fast and long-t...

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Non-line-of-sight (NLOS) imaging aims to reconstruct objects beyond line-of-sight view, enabling potential applications in various fields. However, a fundamental problem is that acquiring the transient images is time-consuming, making it challenging to balance reconstruction quality and acquisition...

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Surface acoustic waves enable long group delays and narrowband analog filtering on-chip, which are difficult to obtain with fast-moving electromagnetic waves. Surface acoustic waves have been introduced to silicon photonics through the absorption of modulated pump light in gratings of metallic eleme...

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We demonstrate an ultra-compact source of on-demand, maximally entangled photon pairs using single GaAs quantum dots embedded in monolithic microlenses coupled to a lensed single-mode fiber. A 3D-printed micro-objective with a numerical aperture of 0.6 enables efficient fiber coupling and near-diffr...

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Maximizing the power conversion efficiency of solar cells plays a crucial role in upscaling solar energy production. Combining two or more solar cells with different bandgaps into a multi-junction tandem solar cell lowers thermalization losses and increases the power conversion efficiency. While the...

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We investigated the optothermal dynamics of optical microresonators operating on a chiral exceptional surface (ES). ES is formed via unidirectional coupling between the clockwise and counterclockwise modes of a microtoroid resonator using a fiber loop mirror placed at one end of the taper fiber wave...

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Fluorescence microscopy is nowadays one of the most diffused techniques to study photophysical processes and molecular interactions in both biomedical and material science fields. Since each fluorophore is characterized by a specific emission spectrum and lifetime, it is essential not only to spatia...

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Topological edge states manifest spin-momentum-locking propagation as a primary consequence of topological crystals. However, experimental studies on spin manipulation and the resulting propagation of these states are lacking. Here, we demonstrate experimentally spin manipulation of topological edge...

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Quantum cascade laser pumped molecular lasers (QPMLs) are capable of widely tunable emissions ranging from 0.1 to almost 10 THz. The QPML concept allows almost any gas composed of molecules with non-zero electric dipole moments to serve as gain media, including recent demonstrations using NH3, N2O,...

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Time-Correlated Single-Photon Counting (TCSPC) enables the measurement of low-intensity optical signals with sub-picosecond timing resolution. Its performance has long been limited by pile-up distortion, which restricts acquisition rates to a small fraction (typically 5%) of the laser excitation rat...

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Photonic memory is an important building block to delay, route, and buffer optical information, for instance, in optical interconnects or for recurrent optical signal processing. Photonic–phononic memory based on stimulated Brillouin–Mandelstam scattering (SBS) has been demonstrated as a coherent op...

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Various methods have been introduced to measure the orbital angular momentum (OAM) of light, from fork holograms to Dove prism interferometers, from tilted lenses to triangular apertures—each with its own benefits and limitations. Here, we demonstrate how simple knife-edge diffraction can be used to...

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The non-contact and label-free nature of Brillouin microscopy, a type of optical elastography, is contributing to the growing popularity of this technology worldwide for applications in fundamental mechanobiology and biomedical diagnostics. The resolution of Brillouin microscopy, however, is not as...

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Single-pixel wavefront imaging provides the possibility to accurately measure and process complex wavefronts in extremely low-light scenes. However, the noises introduced in the turbid environment greatly affect the quality of wavefront imaging. Here, we propose a highly robust single-pixel wavefron...

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Optical injection locking of the repetition frequency of a quantum cascade laser frequency comb is demonstrated using intensity modulated near-infrared light at 1.55 µm, illuminating the front facet of the laser. Compared to the traditional electrical modulation approach, the introduced technique pr...

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