A novel optical singularity protractor enables precise rotation sensing with neuromorphic sensing, overcoming limitations of traditional Doppler-based methods. The approach decodes rotational frequency shift by tracking phase singularity trajectories, achieving high-precision and robust performance in complex scenarios.
Researchers from Shanxi University and Nanjing University demonstrate two-mode squeezed light in the audio-frequency band on a chip, achieving quantum entanglement between generated optical modes. The system enables stable quadrature measurements across multiple frequency channels, paving the way for future chip-scale quantum sensors a...
Large-aperture telescopes rely on high-quality optical mirrors, requiring complex engineering chains for fabrication and testing. Advances in manufacturing and testing technologies are crucial for achieving sub-nanometer surface-figure control and batch consistency.
Researchers summarize a systematic overview of polarization optical metrology for linear birefringence in transparent anisotropic media. The review discusses physical origins, measurement methods, and applications, including residual stress analysis, advanced material characterization, and biomedical imaging.
Kajetan Fijalkowski developed a method for determining electrical resistance without an external magnetic field, opening up new possibilities for future measurement systems. This achievement contributes to the foundations of metrology and has implications for linking different electrical units.
Kartik Srinivasan has been appointed as the new editor-in-chief of Optica Quantum, bringing extensive expertise in quantum photonics and a distinguished record of scientific leadership. He will work to support the journal's success and serve its community with an exceptional editorial board and support team.
A US team has created an integrated manufacturing framework to produce atomic-scale optics for next-generation light sources. The pipeline links atomic-scale fabrication and precision metrology to in-situ X-ray beam validation, achieving deterministic delivery of nanofocusing mirrors.
FPP is evolving from geometric triangulation to light transport analysis with AI and CI, expanding its capabilities beyond shape acquisition. The new framework enables a deeper understanding of light transport, material properties, and scene formation mechanisms, opening opportunities for intelligent perception technologies.
A research team has created a silicon-carbide-based maser that operates continuously above room temperature, enabling new applications in communication and sensing. The maser amplifies microwave radiation and has high frequency stability, making it suitable for precise magnetic field measurements.
Scientists developed a scalable solution for robust optical frequency transfer in noisy field environments using digital phase recording and multifunctional relay stations. The system achieved stable operation and fractional frequency instability of 2.9 x 10^-21 at 1 Hz over 2067 km fiber network.
Researchers have demonstrated that topological insulators can withstand higher measurement currents while maintaining precise Hall resistance values, paving the way for more accurate electrical standards. This breakthrough overcomes significant technical obstacles and enables the development of universal electrical references.
A team of researchers has developed a systematic framework for Raman thermometry, allowing for cross-scale temperature measurement from micrometer-scale chips to single molecules. This capability enables the study of heat in diverse systems, including power electronics and molecular-scale circuits.
This study proposes a frequency-sweeping interferometry technique to measure intertelescope baselines with high precision and stability. Experimental results demonstrate improved stability by 33.47% and ranging accuracy of 44.30 μm over 10 m range.
Researchers developed a laser Speckle-based Curvature Optical Metrology (SCOM) instrument to measure two-dimensional surface curvature of X-ray mirrors. The system offers a compact, flexible alternative to traditional height-based interferometric methods.
A redesigned high-NA EUV lithography optical system has been proposed, which could enable the manufacture of smaller computer chips at lower cost than current methods. The new design eliminates troublesome optical effects, enhances resolution, and should be much cheaper to produce.
A new study introduces a method that analyzes microscopic texture to distinguish authentic artworks from forgeries. The technique uses fractal dimensions to capture subtle patterns created by an artist's brushwork, resulting in a unique signature for each artist.
Researchers at UCD and international collaborators developed a guide to translate theoretical ideas into practical devices for quantum enhanced sensing technologies. Critical quantum sensing uses a quantum system's tipping point as a measurement tool, amplifying tiny signals.
The German Federal Institute for Risk Assessment presents a strategic research agenda for safe advanced materials, covering areas like data collection and state-of-the-art laboratories equipment. The initiative aims to inform policy makers and innovators on regulatory relevant research needs for safer materials.
The transient electro-thermal (TET) technique offers a powerful method for measuring thermal diffusivity and conductivity in emerging low-dimensional materials. With high precision and simplicity, TET is reshaping heat transport characterization.
Dual-comb spectroscopy enables precise, rapid, and broadband measurements using two optical frequency combs with slightly different repetition frequencies. This technique has been implemented across the electromagnetic spectrum, from terahertz to visible range, with ongoing efforts towards ultraviolet range.
Researchers at UCF–UF develop a gram-scale mechanical resonator suspended entirely by diamagnetic levitation, eliminating mechanical supports and energy losses. The device achieves exceptional stability and low dissipation, outperforming high-end MEMS sensors.
A German-Japanese research team applies quantum geometry to non-Hermitian photonic systems, introducing a new degree of complexity. They develop a method to measure the quantum metric directly, enabling the creation of programmable artificial potentials for light and new design possibilities for photonic systems.
The collaboration aims to explore the role of transportable optical frequency standards in international time and frequency metrology. Transportable OFS are considered a promising approach to support comparisons of independent realizations of the second, with the goal of achieving consistent contributions to Coordinated Universal Time.
Researchers develop heterocyclic-linked covalent organic frameworks (COFs) that utilize light to trigger specific redox reactions, reducing soluble uranium into insoluble forms. The materials have shown impressive photocatalytic uranium extraction efficiency and potential for environmental cleanup and nuclear fuel security.
Professor Krausz's election is a recognition of his pioneering attosecond metrology, enabling the observation of electron dynamics on their natural timescales. He has opened new frontiers in physics, chemistry, and materials science with far-reaching implications for fundamental research and technological innovation.
Physicists at the University of Vienna have successfully extended the lifetime of magnons, tiny waves in magnetization, to a hundredfold, paving the way for mini quantum computers. The discovery reveals that materials science is key to further progress, rather than fundamental physics.
Researchers developed a novel design paradigm for vectorial microlasers with designable topological charges using quasi-BIC Möbius-like correspondence in photonic-crystal slabs. This approach allows for programmable structured-light sources for integrated photonic circuits and multi-dimensional optical information encoding.
A new approach to ultrafast nonlinear frequency conversion using dissipative quadratic soliton physics enables simultaneous generation of bichromatic femtosecond pulse trains in a single quadratic nonlinear cavity. This innovation offers a scalable and efficient solution for diverse scientific and technological applications.
Researchers developed a Rydberg dipolar atom chain approach for low-frequency vector electric-field sensing. The technique encodes field amplitude and direction into the many-body dynamical response, offering traceability, micrometer-scale spatial resolution, and vector sensitivity.
The proposed OFC-SCR technique enables parallel multi-frequency interrogation, improving measurement speed by over an order of magnitude. It also achieves high frequency response, wide dynamic measurement range, high sensing sensitivity, and excellent robustness, pushing the performance boundaries of distributed fiber-optic acoustic se...
This study reveals that a femtosecond laser can induce a rise in electronic temperature, transiently blocking optical absorption and enabling multicolor modulation from a single material platform. The discovery opens a new pathway toward ultrafast, broadband, and energy-efficient photonic devices.
KRISS has developed a low-power sensor capable of selectively identifying multiple hazardous gases. The new technology consumes significantly less power than conventional sensors, offering greater cost efficiency while delivering broad applicability.
Researchers have developed a new way to generate acoustic frequency combs using phonon lasers, producing tunable comb teeth spanning from audible to ultrasonic frequencies. The breakthrough enables the creation of ultrabroadband acoustic frequency combs with thousands of evenly spaced frequencies.
A team of Chinese researchers has achieved device-independent quantum key distribution over 100 km, paving the way for practical long-distance quantum networks. This breakthrough enables the creation of scalable quantum repeaters, a critical building block for universal quantum computers.
Researchers report a novel intersection among quantum optics, atomic physics, and precision metrology with the achievement of sub-shot-noise optical readout in a Rydberg atomic medium. The study utilizes velocity-selective Rydberg EIT to enable low-loss optical interface and coherent propagation of squeezed light.
Researchers developed a phase multiplication technique harnessing laser feedback and cavity dynamics to enhance ranging resolution. Higher-order harmonics exhibit higher phase sensitivity, allowing for improved measurement accuracy.
Researchers demonstrate injection locking strategy to synchronize microwave comb spectrum, reducing frequency fluctuations and phase noise. The approach harnesses mechanical nonlinearity for enhanced stability, paving the way for ultra-stable signal generation in demanding environments.
Researchers developed a comprehensive framework to describe intensity fluctuations in Spontaneous Brillouin scattering, linking its stochastic behavior to system parameters. Experimental validation confirmed theoretical predictions, revealing the universal fundamental precision limit imposed by SpBS noise on Brillouin metrology.
A research team has demonstrated how quantum mechanical entanglement can be used to measure several physical parameters simultaneously with increased precision. By distributing atoms into up to three spatially separated clouds, the effects of entanglement act at a distance, reducing measurement uncertainties and canceling disturbances.
A new type of optical atomic clock using ytterbium-173 ions has the potential to revolutionize timekeeping. The clock combines the high accuracy of single-ion clocks with the improved stability of multi-ion operation, making it a promising candidate for the next generation of atomic clocks.
Developed by a collaborative team of researchers, the novel metasurface-based platform harnesses quantum interference to enable precise sensing of subwavelength lateral displacement. The system achieves high accuracy while reducing the required number of detected photons, making it suitable for next-generation semiconductor lithography.
Researchers at TU Wien have developed a nano membrane with an extremely compact parallel-plate capacitor, achieving a new world record in measurement technology. The structure enables ultra-high-resolution atomic force microscopy with superior noise performance limited only by quantum physics.
KRISS has developed a fabrication technique that coats solid electrolyte powders with multifunctional compounds, reducing production costs by over 90% and achieving record-high density without expensive mother powder. This breakthrough enables the commercialization of oxide-based all-solid-state batteries.
Researchers have generated a 19.2-attosecond soft X-ray pulse, creating a camera capable of capturing elusive electron dynamics in unprecedented detail. This breakthrough enables direct observation of processes driving photovoltaics, catalysis, and emerging quantum devices.
The field of quantum structured light has transformed the way we communicate, measure and process information by combining quantum information with spatial and temporal structures of light. This technology enables simpler and faster circuits for quantum computing, as well as improved resolution techniques in imaging and metrology.
Researchers analyzed 70 plastic children's products sold in Brazil and found high levels of toxic substances, with barium levels up to 15 times higher than permitted. The study highlights the need for stricter enforcement measures to protect children's health.
Researchers created a novel alignment method, DIANA, for high-efficiency X-ray optics by combining laser-interferometric tilt/yaw correction with Vernier/moiré-based lateral/rotational alignment. This technique enables precise stacking of X-ray Fresnel zone plates with sub-30-nanometer precision and addresses key challenges in FZP stac...
Researchers have developed a new method for calibrating electrical resistance using memristors, which can provide stable resistance values directly linked to fundamental constants of nature. This approach eliminates the need for complex cooling systems or high magnetic fields, making it a simpler alternative to current systems.
Researchers reviewed novel photonics breakthroughs of 2024, focusing on coupling free electrons with nonlinear optical states in integrated photonic microresonators. This enables ultrafast electron-beam modulation and novel research opportunities for electron imaging and spectroscopy.
Researchers at KIST create a two-photon multi-mode N00N state entangled across four path modes to achieve approximately 88% higher precision compared to conventional methods. The technique demonstrates potential for applications in super-resolution imaging and approaches the Heisenberg limit.
Researchers at Tohoku University propose a way to detect dark matter using highly sensitive quantum devices connected in network structures. This approach outperforms traditional methods and has potential applications beyond dark matter searches.
Artificial materials with subwavelength structures enable shrinking optical setups onto tiny chips. Meta-surfaces manipulate fundamental light properties, boosting photon pair generation efficiency. This allows for on-chip quantum light sources, single-photon detection, and ultra-precise quantum metrology sensors.
Researchers have created a new method for generating bright squeezed light in the kilohertz frequency band with milliwatt optical power. By integrating passive and active noise suppression techniques, they reduced technical noise by 9 dB below shot noise limit, extending feedback bandwidth to MHz range.
Using extreme ultraviolet high-harmonic interferometry, researchers tracked changes in the electronic bandgap of silica glass and magnesium oxide under strong laser excitation. The study found a shrinking bandgap in silica and a widening bandgap in magnesium oxide.
Researchers have developed a novel nonclassical hybrid passive-active power stabilization technique to break the limit of squeezing in the kHz band. The approach reduces technical noise by −122 dB/Hz to −165 dB/Hz, extending the feedback bandwidth from 50 kHz to MHz range.
Researchers use innovative technique to measure vibration frequency of H₂⁺ ion, improving accuracy by three orders of magnitude. The measurement enables precise calculation of fundamental natural constants, including proton-to-electron mass ratio.
A new GaN-based e-beam technology has been developed through joint research between Photo electron Soul and Nagoya University, enabling non-contact electrical inspection and metrology during semiconductor manufacturing. The technology is expected to improve yield and defect detection, leading to increased efficiency in the industry.
The KRISS research team has developed a length measurement system that achieves a level of precision approaching the theoretical limit allowed by quantum physics, boasting world-leading measurement accuracy and compact design. The system measures 0.34 nanometers in just 25 microseconds, operating rapidly and reliably for field deployment.
A new protocol has been developed to enhance quantum metrology by leveraging quantum resonance dynamics in periodically driven spin systems. This approach eliminates the need for highly entangled states and achieves Heisenberg-limited measurement precision. The protocol starts with a robust and easily prepared SU(2) spin coherent state...
Researchers from Hunan University uncover buildup dynamics of harmonic mode-locking in fiber-based Mamyshev oscillators, achieving high stability and signal-to-noise ratio. The study identifies five distinct phases in the generation of stable harmonic mode-locking, challenging conventional understanding of laser emission.