Articles tagged with Laser Light
Researchers have successfully integrated photo-induced superconductivity on a chip using non-linear THz spectroscopy. The electrical response of K3C60 exhibits non-linear behavior, validating previous observations and providing new insights into the physics of this material.
A new method developed by Caltech's Alireza Marandi enables the creation of ultrafast mode-locked lasers on photonic chips, opening up opportunities for compact and affordable ultrafast photonic technologies. The breakthrough could lead to significant advancements in fields like frequency metrology and precision sensing.
Researchers have developed high-performance ultrafast lasers on nanophotonic chips, enabling compact devices for GPS-free precision navigation, medical imaging, food safety inspection and other applications. The new technology has the potential to enable futuristic chip-scale atomic clocks, biological imaging and more.
Recent review highlights research progress on spatiotemporal mode-locking (STML) and dissipative solitons (STDSs) in multimode fiber (MMF) lasers, outlining breakthrough perspectives for STML. Achieving ultrahigh pulse energy and arbitrary mode profiles is crucial, enabling diverse applications such as nonlinear microscopy.
Scientists have created a method to keep targeted particles cool, allowing safe trapping of living cells in their native fluids. This advancement could help overcome problems with current laser light tweezers and enable targeted drug delivery applications.
Researchers developed a new type of laser using Dirac-vortex photonic crystal lasers on silicon, offering high performance and robustness. The discovery paves the way for next-generation silicon-based photonic integrated circuits.
Researchers at UEA have proposed a new method to investigate quantum-mechanical processes in molecules using quantum light. The study shows that phonon signatures can be detected in photon correlations, providing a toolbox for studying quantum sound interactions.
Researchers at LIGO have developed a significant advance in quantum squeezing technology, allowing them to measure undulations in space-time across the entire range of gravitational frequencies detected by LIGO. This breakthrough boosts the observatory's ability to study exotic events and detect about 60 percent more mergers than before.
Researchers have proposed using quasiparticles to create ultra-bright light sources, mimicking the properties of particles moving faster than light. These potential light sources could revolutionize fields like non-destructive imaging, computer chip manufacturing, and scientific research.
The development of a new photonic technique enables the precise control of photonic angular momentum, allowing for the efficient recognition and real-time control of total angular momentum modes. The technique, which involves the symmetrical cascading of two units, has been experimentally demonstrated to recognize up to 42 individual T...
Researchers at University of Otago have developed a new form of antenna for radio waves using an atomic vapor, providing high sensitivity and broad tunability. The portable design enables efficient measurement of fields over long distances, making it suitable for defence and communications applications.
Scientists at Max Planck Institute for the Structure and Dynamics of Matter discovered a way to create a superconducting-like state in K3C60 using laser light. By tuning the laser frequency, they reduced pulse intensity by a factor of 100 while maintaining high temperatures.
Researchers at Max Planck Institute for the Structure and Dynamics of Matter demonstrated that intense laser fields can probe electron dynamics in liquids. The team found that the mechanism of high-harmonic generation is unique to liquids, with the maximum photon energy independent of laser wavelength.
Scientists at the University of St Andrews have developed an electrically driven organic semiconductor laser, overcoming a decades-long challenge. This breakthrough has significant implications for various industries, including communication, medicine, and manufacturing.
Scientists at EPFL's Galatea Laboratory have successfully created a miniature, all-glass femtosecond laser using a commercial femtosecond laser. The device features improved alignment capabilities thanks to the use of glass expansion and shrinkage techniques.
Researchers have found that stacking order and lateral strain can significantly enhance second harmonic generation (SHG) in 2D Janus hetero-bilayers. The study demonstrates a threefold increase in SHG intensity with AA stacking, which is four times higher than AB stacking.
A new device design inspires improved integrated circuit designs by visualizing electric current flow lines around sharp bends. The research enables better understanding of heat generation in electronic devices, leading to more efficient circuit creation and reduced risk of overheating.
Researchers developed a new imaging technique using Bessel beam two-photon microscopy to detect stalling in brain capillaries, which can indicate acute neurological issues. The approach generates clear images of all capillaries every two seconds, providing better temporal resolution and enabling the detection of short stalling events.
Researchers developed a photoelectrochemical technique to precisely tune the lasing wavelength of microdisk lasers with subnanometric accuracy. The new approach facilitates the fabrication of micro- and nano-laser batches with precise emission wavelengths.
The research team created a multi-spectral, super-low-dose photoacoustic microscopy system with improved sensitivity, enabling new applications and clinical translation. The system achieved up to capillary-level or sub-cellular resolution at greater depths than traditional optical microscopy methods.
Scientists at Beijing Institute of Technology have developed an ultrafast quasi-three-dimensional technique, enabling higher dimensions to analyze ultrafast processes. This method breaks through the limitations of original observational dimensions, enhancing our ability to analyze ultra-fast processes comprehensively.
Researchers have created chip-based optical frequency combs using dissipative Kerr solitons, increasing output power for applications like atomic clocks. The advancement paves the way for highly portable precision metrology devices.
A team of scientists has developed an intense four-octave-spanning ultraviolet-visible-infrared full-spectrum laser source using a cascaded architecture of gas-filled hollow-core fiber, lithium niobate crystal, and chirped periodically poled lithium niobate crystal. The system leverages the synergic action of second-order nonlinear eff...
Researchers have developed a new way to identify chiral molecules using light, which vastly improves detection efficiency. The new method uses lasers to drive chiral electronic currents in molecules, causing one version to emit bright light while its counterpart remains dark.
Controlling the source of electromagnetic waves enables control of the period of laser-induced periodic surface structures (LIPSS), increasing fabrication speed and accuracy. Researchers discovered that varying the substrate material affects the LIPSS period, allowing for more precise manipulation.
A new technique combining ultrafast physics and spectroscopy reveals the dance of molecular 'coherence' in unprecedented clarity. This shows a vibrational effect, rather than motion for the functional part of the biological reaction that follows.
Researchers develop low-cost 3D nanoprinting system with nanometer-level accuracy for printing microlenses, metamaterials, and micro-optical devices. The system uses a two-step absorption process and integrated fiber-coupled laser diode, making it accessible to scientists beyond optical experts.
A team at Osaka University has simulated photon-photon collisions to produce electron-positron pairs, paving the way for experimental confirmation of quantum physics theories. The simulation uses ultra-intense laser pulses and demonstrates the feasibility of creating matter solely from light.
The study investigated high harmonic spectroscopy as a method to observe topology in materials. Despite thorough analysis, the researchers found that non-topological aspects of the system dominated its response, suggesting that topology may play a minor role.
UVA professor Patrick Hopkins is developing a 'freeze ray' technology to cool electronics in spacecraft and high-altitude jets, which can't be cooled by nature due to the vacuum of space. The technology uses heat-generating plasma to create localized cooling, and has been granted $750,000 by the Air Force.
Bound states in the continuum (BICs) provide a generalized approach to achieve extremely high-Q resonant cavities. BICs offer powerful mechanisms for enhancing light-matter interactions and have been explored in various photonic structures over the past few decades.
Researchers have proposed an innovative solution to address limitations of lidar technology, enabling imaging in low SNR environments. The novel technique uses a high-scanning speed AOD and metasurface-enhanced scanning lidar, extending ambiguity range by up to 35 times.
A team of researchers from EPFL has found a way to harness the unique features of chaotic frequency combs to implement unambiguous and interference-immune massively parallel laser ranging. This innovative approach offers significant advantages over conventional methods, enabling hundreds of multicolor independent optical carriers.
The study reveals that quantum thermal machines exhibit distinct synchronization behavior, with cooperation and competition emerging among different components. The researchers found that cooperation manifests in harmony-like synchrony, while competition thrives in chaotic conditions.
Researchers optimize linewidth narrowing in self-injection-locked on-chip lasers by integrating III-V QW or QD distributed feedback lasers with SiN microring resonators. The study achieves drastic reductions in lasing linewidth to the Hz-level using Rayleigh backscattering.
The team's breakthrough enables the production of bright visible-wavelength pulses in the femtosecond range directly with fiber lasers. This advance has significant implications for various fields, including high-precision ablation of biological tissues, two-photon excitation microscopy, and material processing.
Fiber sensing scientists from Shenzhen University have developed an encrypted fiber optic tag that can be used for all-optical labeling and recognition of optical transmission channels. The team proposed a method using fiber Bragg grating arrays prepared by femtosecond laser direct writing to flexibly store different coding sequences.
Scientists have developed a new technique to cool membranes with lasers, achieving temperatures close to absolute zero without measurement. The method uses a coherent feedback loop, where laser light acts as both sensor and damper, to dampen thermal vibrations and reach extremely low temperatures.
A new composite material made of ultra-tiny silicon nanoparticles and an organic element can convert lower-energy light into higher-energy light, enabling the formation of free radicals to attack cancer tissue. The material has potential applications in boosting solar panel efficiency and improving bioimaging technologies.
The study used transcranial photobiomodulation (tPBM) to stimulate the prefrontal cortex, a region involved in cognitive function. The results showed that tPBM modulated hemodynamic and metabolic activities in a wavelength- and site-specific manner.
Researchers have developed a custom OCT setup that incorporates a vertical cavity surface emitting laser (VCSEL) diode, which could increase access to OCT imaging and help catch eye problems early. The system performed well in imaging the eye of a healthy volunteer and showed potential for use in biometric eye scanner systems.
Researchers at Tohoku University have developed a technique to micro/nanofabricate silicon nitride thin devices using a femtosecond laser. The method enables precise machining and contaminant removal, opening doors for non-destructive cleaning of high-purity graphene. By applying this method to an ultra-thin atomic layer of graphene, t...
Researchers developed a novel endoscopic imaging system with a bioinspired sensor that can detect multiple fluorescent probes, enabling more accurate fluorescence-guided cancer surgery. The system showed improved spatial resolution and sensitivity in detecting tumors, paving the way for the adoption of multi-tracer FGS.
Researchers have developed an all-fiber Mamyshev oscillator that produces high-energy ultrafast pulses, exceeding previous records. The device achieves a single pulse energy of 153 nJ and average power of 3.4 W with sub-100 fs pulse widths.
Researchers at the University of Illinois have developed a new procedure, SCRIBE, that enables precise printing of microdevices into existing materials. The technique uses multiphoton lithography to selectively modify regions of the material's interior and manufacture custom small-scale optical devices.
Researchers develop innovative data compression scheme to facilitate multispeckle diffuse correlation spectroscopy with high pixel resolutions, enabling non-invasive measurement of brain blood flow. The scheme uses field-programmable gate array compression to alleviate computational burdens and expand the use of SPAD cameras in biomedi...
Researchers have developed a quantum lidar system that uses single-photon detection to acquire high-resolution 3D images underwater. The technology has the potential to inspect underwater installations, monitor submerged archaeology sites, and enhance security applications.
Researchers capture elusive missing step in photosynthesis using SLAC's X-ray laser, revealing an intermediate reaction step that sheds light on how nature optimizes photosynthesis. The data provide a blueprint for optimizing clean energy sources and avoiding side products.
Researchers at the University of Pennsylvania School of Engineering and Applied Science have created a photonic device that provides programmable on-chip information processing without lithography. This breakthrough enables superior accuracy and flexibility for AI applications, overcoming limitations of traditional electronic systems.
Physicists at FAU have successfully measured and controlled electron release from metals in the attosecond range using a special strategy. This achievement could lead to new quantum-mechanical insights and enable electronic circuits that are a million times faster than current technology.
A team from Nanjing University and Sun Yat-Sen University developed a two-facing Janus OPO scheme for generating high-efficiency, high-purity broadband LG modes with tunable topological charge. The output LG mode has a tunable wavelength between 1.5 μm and 1.6 μm, with a conversion efficiency above 15 percent.
Scientists create a simple approach to fabricating highly precise 3D aperiodic photonic volume elements (APVEs) for various applications. The method uses direct laser writing to arrange voxels of specific refractive indices in glass, enabling the precise control of light flow and achieving record-high diffraction efficiency.
Researchers at Brown University developed a new microscopy technique using blue light to measure electrons in semiconductors and other nanoscale materials. This breakthrough enables the study of critical components that can help power devices like mobile phones and laptops.
Researchers at Colorado State University propose using ultrathin films of molybdenum disulfide to improve solar cell efficiency. The material displays unprecedented charge carrier properties that could lead to drastic improvements in solar technologies.
Scientists have developed a method to activate protein functions using brief flashes of light, enabling precise control over when and where chemical reactions occur. This technology has potential uses in tissue engineering, regenerative medicine, and understanding biological processes.
A team of researchers at the Max Born Institute developed a novel method for X-ray Magnetic Circular Dichroism (XMCD) spectroscopy using a laser-driven plasma source. This breakthrough enables precise determination of magnetic moments in buried layers without damaging samples, and can monitor ultrafast magnetization processes.
Imperial College London physicists have recreated the famous double-slit experiment, showing light behaves as both particles and waves in time. This experiment could lead to ultrafast optical switches and control over light in space and time.
A study published in Lasers in Surgery and Medicine suggests that light therapy, known as photobiomodulation (PBM), can improve heart function and reduce the thickness of the cardiac wall in middle-aged mice. The research also found improved neuromuscular coordination and a significant survival rate among mice with severe heart disease.
Physicists at Delft University of Technology have developed a new technology on a microchip combining optical trapping and frequency combs to measure distances with high precision in opaque materials. The technology uses sound vibrations instead of light, offering a simple and low-power solution for applications such as monitoring the ...
A team of researchers has demonstrated the ability to dynamically steer incoherent light pulses using a semiconductor device, paving the way for applications such as holograms, remote sensing, and self-driving cars. The technique uses metasurfaces to manipulate light waves, offering a low-power alternative to traditional laser beams.