Articles tagged with Semiconductor Lasers
A team of researchers from Chiba University developed a method to monitor laser ablation in real time by detecting tiny push-back forces during laser cutting. By tracking the recoil force, they can sense depth and detect completion in real time, allowing for precise control over the process.
The University of Rochester-led NSF STELLAR Engine launches to strengthen US competitiveness in global markets by advancing lasers and laser application research. The project aims to bring New York laser research, development, and manufacturing to a scale that can compete globally.
Researchers developed a new cavity control strategy to improve efficiency of blue VCSEL lasers, achieving 26.4% wall plug efficiency. The approach identified optimal mirror loss conditions and extracted device parameters, providing guidance for next-generation high-efficiency visible-light semiconductor lasers.
Researchers developed world's first practical surface-emitting laser using quantum dots, advancing miniaturization and energy efficiency of light sources. The innovation enables high-performance, scalable structures and cost reductions through mass production.
A new low-cost, diode-based laser system safely emulsifies cataract tissue without damaging surrounding tissue. The technology has the potential to significantly reduce cataract surgery costs and complexity, bringing sight-saving treatment to millions worldwide.
Researchers developed a compact, solid-state laser system that generates 193-nm coherent light, marking the first 193-nm vortex beam produced from a solid-state laser. This innovation enhances semiconductor lithography efficiency and opens new avenues for advanced manufacturing techniques.
Researchers derived 2D coupled wave equations for photonic crystal surfaces, aiding the development of efficient laser devices. The findings established parallels between TM and transverse electric polarisation behaviours, offering unique advantages in certain configurations.
Researchers at UCF are developing a compact semiconductor light source that can disinfect rooms with UV-C light, suitable for defense and civilian use. The laser device aims to last up to 10,000 hours, overcoming its current short lifespan.
Researchers at UMass Amherst have developed a new method for aligning 3D semiconductor chips with precision as small as 0.017 nanometers, enabling lower costs and increased access to this technology. The approach uses lasers and holograms to detect misalignments without moving parts.
Researchers at ETH Zurich have set a new record for the strongest laser pulses, surpassing previous records by over 50%, using a special arrangement of mirrors and a semiconductor mirror. The pulses can be used to create high harmonic frequencies up to X-rays, enabling fast processes in the attosecond range.
Cornell University researchers have created a dual-sided semiconductor chip that combines photonic and electronic functions, shrinking device size and energy consumption. This innovation leverages the unique properties of gallium nitride crystals, allowing for multiple functionalities to be integrated into a single wafer.
Researchers have developed a new engineering approach to on-chip light sources, enabling the widespread adoption of photonic chips in consumer electronics. The innovation involves growing high-quality multi-quantum well nanowires using a novel facet engineering approach, which enables precise control over the diameter and length of the...
Researchers developed a new spectroscopy method using tunable lasers, enabling precise tracking of the laser's color at every point in time. The technique offers higher power and spectral stability compared to existing methods, making it suitable for various applications including LIDAR and spectroscopy.
Researchers have achieved a significant breakthrough in surface-emitting semiconductor laser efficiency using multi-junction cascaded active area technology. The new design strategy increases gain volume, enhancing differential quantum efficiency and maintaining lower threshold current.
Researchers have developed VECSELs with record output power and absolute frequency stability, overcoming the hurdle of spectral differences between glass fibers and quantum bits. These lasers enable low-loss transmission and precise frequency conversion for quantum internet applications.
GaN-based VCSELs have potential applications in adaptive headlights, retinal scanning displays, and high-speed visible light communication systems due to their high efficiency and low fabrication cost. The new method for precise cavity length control enables highly controlled fabrication of VCSELs with aperture sizes ranging from 5 to ...
Scientists at Tohoku University create a tiny spot in glass using a tailored laser beam, enabling precise processing at scales below 100 nanometers. The breakthrough opens up new possibilities for laser nano-processing in various industries and scientific fields.
Researchers at NIST have developed compact chips that convert light into microwaves with reduced timing jitter, improving GPS accuracy, phone connections, radar systems and astronomical images. This technology has the potential to increase radar sensitivity, improve analog-to-digital converters and enhance the clarity of images.
Researchers developed a compact, cost-effective PA sensing instrument for biomedical tissue diagnosis, showcasing its potential to streamline sampling processes and improve diagnostic accuracy for breast disease. The instrument successfully differentiated various tissue types based on quantitative spectral parameters.
Researchers have developed a new III-V semiconductor nanocavity that confines light at levels below the diffraction limit, enabling fast data transmission and reduced energy consumption. The achievement demonstrates deep sub-wavelength confinement of light in a topology-optimized InP nanocavity.
Researchers at EPFL's Photonic Systems Laboratory develop a hybrid device that significantly improves existing laser technology by enhancing coherence and emitting visible light. This innovation has implications for telecommunications, metrology, and precision applications.
Researchers introduced a cost-effective solution to correct tilt and curvature errors in two-photon polymerization 3D printing. The method uses Fourier scatterometry, which offers lower uncertainties than traditional methods, resulting in improved image quality and precision.
Scientists from Meijo University successfully fabricated vertical AlGaN-based UV-B semiconductor laser diodes with distinct characteristics, operating at room temperature and exhibiting high optical output. The devices overcome existing challenges in fabrication and pave the way for novel manufacturing processes.
A new study by Meijo University researchers explores a novel method for removing insulating substrates from AlGaN semiconductors using heated and pressurized water. The method enhances conductivity, applicability to various semiconductor wafers, and has potential for high-power UV-light emitting devices.
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.
Researchers successfully fabricate a microlens on a single-mode polarization-stable VCSEL chip using 2-photon-polymerization 3D printing, reducing beam divergence from 14.4° to 3° and enabling compact optical gas sensors with improved performance.
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.
Scientists have successfully integrated monolithic semiconductor lasers onto Si-photonics chips, overcoming a longstanding challenge. The approach uses III-V material deposition on a Si-PIC design, achieving high coupling efficiency into passive photonic devices.
Researchers have developed a novel electrically pumped edge-emitting laser chip with unprecedented performance, achieving single-mode output power levels of 400 mW at room temperature. The device uses PT-symmetry to suppress higher-order modes, maintaining beam quality comparable to narrow waveguide devices.
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.
Scientists successfully observe and quantify a two-dimensional electron gas at the semiconductor interface, enabling control of its performance. This breakthrough leads to the development of high-performance high-frequency/power devices with improved interface analysis and control.
Researchers have demonstrated an easy method to alter VCSELs to reduce speckles, improving their suitability for applications like lighting and holography. By changing the device shape, they introduced chaotic behavior, allowing more modes to be emitted and reducing speckle density.
Researchers at ARC Centre of Excellence for Transformative Meta-Optical Systems have developed a miniaturized optical system that can be integrated on a chip, allowing for the creation of 3D holograms. This technology has the potential to replace current 2D imaging, enabling less invasive surgeries and better surgical outcomes.
Researchers at Nagoya University have achieved a breakthrough in developing deep-ultraviolet laser diodes, which could revolutionize applications such as sterilization and medicine. The team successfully reduced the operating power needed for continuous-wave lasing to just 1.1W at room temperature.
Researchers from LP3 Laboratory developed a light-based technique for local material processing in three-dimensional space of semiconductor chips. They successfully fabricated embedded structures inside Si and GaAs materials, which cannot be 3D processed with conventional ultrafast lasers.
A new type of integrated semiconductor laser has been developed using the Pockels effect, integrating a lithium-niobate-on-insulator platform. This technology enables fast reconfigurability and narrow spectral window, paving the way for applications in LiDAR remote sensing, microwave photonics, atomic physics, and AR/VR.
A team at KAUST has created an ultrathin dielectric metalens that improves focusing capabilities and can be scaled down for integration with photonics equipment. The metalens, designed from a custom array of TiO2 nanopillars atop a DBR, offers negligible intrinsic loss and easy fabrication.
Researchers developed a novel approach to generate high-speed random numbers using self-chaotic microcavity lasers. The study achieved physical random numbers at 10 Gb/s, paving the way for small and robust random signal sources.
A team of scientists has proposed a new concept of 'superabsorption' to solve the difficulty of realizing single-mode lasers in microscale cavities. They designed an n-PtNPs@ZnO:Ga MW/Pt/MgO/p-GaN heterojunction with excellent lasing performance and single-mode operation.
Researchers at UC Berkeley created a new type of semiconductor laser that maintains a single mode while scaling up in size and power. This breakthrough enables more powerful and coherent lasers for various applications, including fiber optic communications and biometric identification systems.
Researchers have developed a new method to expand the wavelength range of nanowire lasers using the second-order nonlinear effect. By utilizing this effect, high-quality GaAs/In core/shell NWs can generate visible lasing peaks at 508 nm via self-frequency-conversion processes such as second-harmonic generation (SHG). The technology als...
Researchers at Cornell University have developed a high-quality crystal of aluminum nitride and created an optical cavity to trap emitted light, enabling the production of a deep-ultraviolet laser with exceptional precision. The breakthrough has significant implications for various applications, including sterilization, sensing, and ph...
Researchers have developed a room-temperature perovskite polariton parametric oscillator, enabling scalable and low-threshold nonlinear devices. This breakthrough offers possibilities for the development of cost-effective and integrated polaritonic devices.
Researchers have successfully demonstrated laser emission from ultra-thin crystals consisting of three atomic layers, a breakthrough that could lead to miniaturized circuits and future quantum applications. The discovery showcases the potential of these materials as a platform for new nanolasers capable of operating at room temperature.
A lung model mimicking complex anatomy has enabled the assessment of respiratory volumes using a gas-in-scattering-media absorption spectroscopy (GASMAS) technique. The study demonstrates the feasibility of GASMAS to sense changes in gas volume in a controlled environment, paving the way for potential clinical applications.
Researchers at North Carolina State University have developed a new synthesis process that increases the number of holes in p-type III-nitride semiconductor materials, leading to more efficient LEDs and lasers. This breakthrough could also help address the long-lasting problem called the 'green gap' in LED technology.
Laser technology utilizing nanostructures like quantum dots and dashes enables high-speed data transmission and low-latency communications. Scientists highlight the importance of these devices for industry and society, particularly in applications such as coherent communication and quantum key distribution.
The Bowers lab and EPFL team developed an integrated semiconductor laser and resonator capable of producing soliton microcombs, expanding data transmission capabilities. The technology enables seamless integration with low-loss nonlinear optical micro-resonators, lending itself to commercial-scale production.
Researchers at EPFL and UCSB successfully integrate ultralow-loss Si3N4 photonic integrated circuits with semiconductor lasers, enabling chip-scale frequency combs for high-capacity transceivers, data centers, and sensing applications. This breakthrough paves the way for large-volume, low-cost manufacturing of soliton microcombs.
A novel vertical-cavity surface-emitting laser design has been developed, combining multiple transverse coupled cavities to enhance optical feedback. This innovation extends the temporal bandwidth of VCSELs, enabling a modulation bandwidth of up to 100 GHz, beyond the known limit of relaxation oscillation frequency.
Researchers from Kyoto University have created a beam-scanning device using photonic crystals, eliminating the need for moving parts. The technology enables high-power, high-beam-quality two-dimensional beam scanning lasers with improved resolution and accuracy.
Weidong Zhou, a UT Arlington electrical engineering professor, has been named a fellow of the Optical Society (OSA) for his significant contributions to photonic crystal membrane lasers and hybrid nanomembrane optoelectronics. His research involves developing on-chip systems for healthcare applications and efficient, scalable lasers fo...
Researchers at Aarhus University have discovered a method to narrow laser linewidth by up to 500 times, enabling higher-order modulation formats in coherent communication. This breakthrough technology has the potential to increase optical network transport capacity and simplify laser packaging for real-world applications.
Researchers developed a novel method to generate variable low-noise microwaves using an optical microresonator frequency comb and a compact laser. The approach allows for significant frequency tunability and improved phase-noise levels compared to traditional methods.
University of Washington researchers have successfully cooled a solid-state semiconductor material using an infrared laser, achieving a temperature drop of up to 20 degrees C. The method has wide potential applications in fields such as quantum communication and scientific instruments.
Researchers at Lehigh University developed a new phase-locking technique to achieve record-high output power for terahertz lasers, resulting in the highest radiative efficiency for any single-wavelength semiconductor quantum cascade laser. The breakthrough enables higher intensity and brightness, paving the way for applications in iden...
Researchers develop nanoparticle-sized semiconductor laser generating coherent green light at room temperature, overcoming a significant technological hurdle. The tiny laser operates efficiently without external pressure or low temperatures.
Researchers developed an extremely low-density tin 'bubble' to overcome EUV light source limitations. This innovation enables efficient and low-cost production of compact, high-performance integrated chips.
Researchers have fabricated high-performance mid-infrared laser diodes directly on microelectronics-compatible silicon substrates, paving the way for low-cost sensors for real-time environmental sensing. The new fabrication approach reduces costs by using industry-standard processing techniques.
Scientists have created a compatible semiconductor laser made of germanium and tin, with efficiency comparable to conventional GaAs semiconductor lasers on Si. The new laser can be manufactured during the CMOS production process, reducing waste heat and enabling continuous operation.