Articles tagged with Semiconductor Lasers
Scientists demonstrate multi-nanosecond lasing at room temperature using novel direct-indirect semiconductor heterostructures. The novel material structure and high-quality cavity contribute to a low lasing threshold of just 6uJ/cm^2.
Researchers discovered a new mechanism of optical gain in two-dimensional materials that requires only extremely low input power. This breakthrough has significant implications for the development of energy-efficient photonic devices, potentially reducing the need for high electrical power.
Researchers from NTU Singapore and the University of Leeds create a 'topological' laser that can route light particles around corners and cope with defects in its manufacture. This innovation has the potential to improve the performance of laser systems and enable more efficient production using existing semiconductor technologies.
Researchers successfully demonstrated a quantum dot LED that operates as an optically pumped laser, clearing the path towards versatile colloidal quantum dot laser diodes. These devices have the potential to revolutionize fields like photonics, optoelectronics, and medical diagnostics.
Michael Vasilyev, a UTA professor, was recognized as a Fellow of the International Society for Optics and Photonics (SPIE) for his achievements in nonlinear-optical signal processing. He solved the problem of making all-optical regenerators process multiple data channels at once, reducing cost, size, and power consumption.
The Ferdinand-Braun-Institut presents its developments in diode lasers and UV LEDs, including high-power stacks for industrial laser technology and a compact dual-wavelength system for SERDS spectroscopy. The institute also exhibits a terahertz camera sensor with high sensitivity and fast response time.
Researchers at Kyushu University have successfully demonstrated the lasing by direct electrical stimulation of an organic film, overcoming previous performance limitations with improved materials and device structures. The breakthrough enables applications such as biosensing, displays, healthcare, and optical communications.
Researchers from Moscow Institute of Physics and Technology have found superinjection to be possible in homostructures, composed of a single material. This enables the creation of mass market devices, such as ultraviolet LEDs thousands of times brighter than previously thought possible.
Researchers have developed a novel concept for rapid data transfer using spin lasers, which can work at least five times faster than traditional systems and consume significantly less energy. The technology has the potential to revolutionize data transmission, but further optimization is needed.
Researchers from Moscow Institute of Physics and Technology developed a method to distinguish between true laser action and LED-like regime in nanolasers. The new technique allows for the calculation of a nanolaser's actual lasing threshold, which is crucial for its practical applications.
Researchers developed a compact, environmentally stable laser with an ultra-narrow linewidth of 20 hertz, suitable for improving GPS accuracy and detecting gravitational waves. The laser's stability is maintained through self-referencing temperature sensing, allowing precise correction signals to be applied.
The MIT-designed terahertz laser achieves three key performance goals: high constant power, tight beam pattern, and broad electric frequency tuning. This technology could be used for improved skin and breast cancer imaging, detecting drugs and explosives, and mapping the Milky Way galaxy.
Researchers have developed a method to narrow the emission spectrum of an ordinary diode laser, making it suitable for spectroscopic chemical analysis. The technique uses optical microresonators to generate frequency combs, which can be used in applications such as security monitoring systems and lidars for self-driving cars.
Researchers have developed a new technique using 'quantum chaos' to prevent optical filaments from forming in semiconductor lasers, leading to instabilities. The new system uses a D-shaped cavity to create a quantum chaotic landscape, disrupting the formation of self-organized structures and maintaining laser stability.
Researchers used terahertz frequency quantum cascade lasers to study laser stabilisation process, measuring wavelength changes in femtoseconds. This ultrafast detection capabilities provide unprecedented levels of detail, leading to more efficient devices and systems.
Researchers explain Auger recombination in graphene as prohibited by classical laws due to quantum uncertainty. They found conditions for low probability and propose viable graphene-based lasers using low-energy carriers.
A new technique enhances power output of single-mode lasers, enabling terahertz spectroscopy applications. The technique introduces a hybrid second- and fourth-order Bragg grating in the laser's optical cavity.
Researchers from the University of Central Florida and Technion-Israel have developed a nonmagnetic topological insulator laser, improving efficiency, beam quality, and resilience. This breakthrough technology has potential applications in various fields, including science and technology.
Researchers have successfully created an all-silicon laser based on silicon nanocrystals, which achieves high optical gains and demonstrates reliable lasing characteristics. The development of this technology paves the way for electrically pumped all-Si lasers.
Researchers have developed an electrically pumped organic semiconductor laser that overcomes the challenge of high optical loss and achieves a low threshold current, paving the way for room temperature continuous-wave lasing. The device uses a small molecule doping system and has a peak wavelength of 621.7 nm.
Scientists have successfully created the first continuous-wave lasing in an organic-inorganic lead halide perovskite semiconductor, which could be a crucial step towards developing electrically driven devices. By adjusting the material's temperature, they avoided a phenomenon known as lasing death and achieved over an hour of lasing.
A research team at the University of New Mexico is developing ultrafast laser transmitter technology that could send data at a speed of over 100 gigabits per second, ten times faster than current fiber optic networks. The goal is to enable high-speed communication in applications such as remote medical consultations and IoT connectivity.
Weidong Zhou is developing a high-power semiconductor laser that is compact, efficient and power-scalable. The goal of this project is to address the challenges associated with scaling laser power towards kilo- and mega-watts level while maintaining excellent beam quality, high-energy efficiency and compact size.
A team of German researchers has developed a buried tunnel junction VCSEL with a single-stage type-II active region to extend the wavelength coverage of electrically pumped VCSELs into the mid-infrared range. This achievement demonstrates the potential for low-power, battery-operated gas sensors in various industries.
Researchers have demonstrated a new type of laser using bound states in the continuum, which can be more compact and energy-efficient. This technology has the potential to revolutionize telecommunications and computing applications.
The study introduces tunneling modulation of a quantum well transistor laser, enabling fast carrier transport and recombination. This technology relies on intra-cavity photon-assisted tunneling, which enhances optical absorption and modulation in transistors and lasers.
Sushil Kumar aims to create terahertz semiconductor lasers with precise emission frequency, improving power output and beam quality. His goal is to enable various applications including chemical sensing, disease diagnosis and remote-sensing in astronomy.
Scientists have successfully integrated tiny high-performance lasers directly onto silicon wafers, overcoming a decades-old semiconductor industry challenge. This breakthrough enables faster and more energy-efficient data transmission, paving the way for on-chip integration of photonics with electronics.
Researchers at UTA are using ultra-thin semiconductor lasers to create more efficient and power-consumption systems for computers and data centers. The technology has the potential to be applied in various fields, including medicine and consumer electronics, enabling devices with increased speed, bandwidth, and capabilities.
A Northwestern University team has developed a mid-infrared tunable laser integrated into an on-chip amplifier, demonstrating an order-of-magnitude increase in output power. The new technology allows for adjustable wavelength output, modulators, and amplifiers in a single package, enabling more efficient detection of hazardous chemicals.
Researchers at Osaka University developed a new method for evaluating the quality of wide-gap semiconductors using terahertz waves. The laser terahertz emission microscope (LTEM) revealed correlations between defect density and THz wave emission, showing promise for next-generation energy-saving devices
Researchers at Arizona State University have created a novel nanosheet that emits light of all visible colors, producing a white laser. This technological advance brings lasers closer to being a mainstream light source, potentially replacing LEDs in various applications.
Researchers from the University of Southampton have developed a new technique for generating more powerful and efficient pulsed lasers. The technique uses coherent combination of multiple semiconductor lasers, allowing for complex pulse waveforms with user flexibility.
A new Yale-developed laser reduces speckle contrast in full-field imaging, enabling brighter and clearer images. The technology combines traditional laser brightness with LED-like properties, addressing a significant barrier in biomedical imaging and microscopy.
Scientists have created the first germanium-tin semiconductor laser for silicon chips, enabling faster data transfer and reducing energy consumption. The new material can be applied directly onto a silicon chip, paving the way for high-speed data transmission.
Researchers at Princeton University have successfully built a rice-sized laser powered by single electrons tunneling through artificial atoms known as quantum dots. The device demonstrates a major step forward for efforts to build quantum-computing systems out of semiconductor materials, according to co-author Jacob Taylor.
Scientists from the University of Southampton have developed a novel approach to generate spectrally-efficient modulation format signals using direct current modulated lasers. This innovation avoids costly external modulator schemes, reducing power consumption and increasing efficiency.
Researchers have developed a new ultrafast imaging technique using multi-wavelength lasers to overcome the limitations of traditional imaging systems. This breakthrough enables real-time optical imaging with high resolution and fast frame rates.
Researchers at JILA discovered a new quasiparticle, called a 'quantum droplet', which has both quantum and liquid-like characteristics. The droplets are stable enough for future studies on interactions between light and highly correlated states of matter.
Researchers at Caltech have created a new laser that can carry vast amounts of information, increasing data transmission rates in optical-fiber networks. The high-coherence laser has a 20 times narrower range of frequencies than previous lasers, enabling faster and more efficient communication.
Scientists have demonstrated laser action in semiconductor nanowires that emit light at technologically useful wavelengths and operate at room temperature. The nanowire lasers could represent the next step in developing smaller, faster, more energy-efficient sources of light for various applications.
Researchers at TUM developed a new laser technology that produces compact, efficient ultrashort pulses. The technology uses a 'rainbow' buffer to reshape continuous wave output into short intense pulses, enabling applications in biomedical imaging, material processing, and communications.
Physicists at UT Austin have developed the world's smallest semiconductor laser, operating below the 3D diffraction limit. The breakthrough device uses nanolasers to generate optical signals and transmit information, potentially replacing electronic circuits.
Researchers have developed a new laser design that shrinks on-chip lasers to 2 micrometers in height, significantly reducing size and increasing performance. This breakthrough could enable faster data transfer rates and more efficient energy use in high-speed computers.
A new prototype technology demonstrates all three primary laser colors coming from one material. This breakthrough could lead to making products such as high-performance digital displays that employ a variety of laser colors.
Researchers created light at multiple frequencies by mixing high- and low-frequency lasers, producing new colors. The phenomenon has potential applications in increasing data transfer speed and communication.
The Optics Express Focus Issue on Modular Ultrafast Lasers showcases state-of-the-art developments in femtosecond lasers, enabling new applications in biology, medicine, chemistry, and energy research. Key findings include the generation of broad-bandwidth frequency combs for precision metrology and spectroscopy.
A team of UC San Diego researchers created the smallest room-temperature nanolaser to date, as well as a highly efficient, thresholdless laser that funnels all its photons into lasing without waste. These breakthroughs could enable the development of future optical circuits packed onto tiny computer chips.
Researchers at the University of Illinois developed a method to chemically etch patterned arrays in gallium arsenide, used in solar cells and lasers. The new technique, called metal-assisted chemical etching (MacEtch), is faster and less expensive than traditional dry etch methods.
Researchers in Bochum developed a new concept for ultrafast semiconductor lasers by leveraging the intrinsic angular momentum of electrons called spin. This innovation enables modulation frequencies above 100 GHz, paving the way for high-speed data transmission and future Internet applications.
A recent study conducted by Sandia National Laboratories found that diode lasers can produce high-quality white light comparable to LEDs, which may lead to new lighting technologies. The research used a test involving volunteers and different lighting sources, including LED bulbs, incandescent lights, and diode laser combinations.
Researchers at Yale University created two lasers that use short-range order to control light, producing brilliant colors like a bluebird's wings. The bio-inspired technology could lead to more efficient solar cells and long-lasting paint, with potential applications in cosmetics and textiles.
Researchers have successfully generated high-power, narrowband terahertz radiation at room temperature using a single semiconductor chip. This breakthrough could enable rapid security screening, border protection, high-sensitivity biological/chemical analysis, and astronomical applications.
Researchers at UCL have demonstrated the first electrically driven quantum dot laser grown directly on a silicon substrate with a suitable wavelength for telecommunications. This breakthrough enables efficient light sources in silicon, a crucial material for future silicon photonics.
Researchers at JILA have created a terahertz radiation source that is unusually efficient and less prone to damage than similar systems. The technology uses ultrafast lasers and semiconductors to produce high-intensity output, making it suitable for applications such as detecting trace gases or imaging weapons.
Researchers will analyze and control coupled semiconductor laser systems using a rigorous mathematical approach to study collective behaviors in a highly-controlled environment. The team aims to contribute to understanding of collective behavior benefiting scientists across disciplines.
Researchers at Harvard University have developed a new terahertz semiconductor laser that emits highly collimated beams, suitable for applications such as security screening and chemical sensing. The advance uses metamaterials to confine and collimate the THz light, opening up new possibilities for terahertz science and technology.
Researchers at NIST and JILA developed a new type of pulsed laser that excels at not producing light, generating sustained streams of dark pulses. These ultrashort pulses are suitable for measurements on short timescales and may be useful in signal processing.
Researchers have successfully demonstrated the world's smallest semiconductor laser, paving the way for ultra-sensitive bio-detection, nanoscale optics, and enhanced communication systems. The breakthrough technology has potential applications in various fields, including healthcare, optics-based telecommunications, and optical computing.
Researchers at MIT have developed a new method to tune terahertz quantum cascade lasers, enabling the creation of compact and tunable scanners capable of identifying explosives. The technique involves manipulating the transverse mode of the laser using a mechanical lever, allowing for precise control over the emitted frequency.