Articles tagged with Optoelectronics
Researchers have created a hybrid Dirac semimetal photodetector that captures low-energy photons with high sensitivity and efficiency. The device features excellent environmental stability and can generate photocurrent across a wide spectral regime.
A team of scientists has developed an optoelectronic NIR-to-visible upconversion device with a linear response, fast dynamics, and low excitation power. The device exhibits intensity-temperature sensitivity and spectrum-temperature sensitivity, enabling spatially resolved thermal sensing and applications in biomedical diagnostics.
Scientists have created nanomechanical resonators with extremely high quality factors using a regular polygon design, leading to compact devices for sensing weak forces. The new design allows for precision force sensing with sensitivity approaching state-of-the-art atomic force microscopes.
Scientists at the University of Tsukuba have created a nanocavity in a waveguide that selectively modifies short light pulses, enabling the development of ultrafast optical pulse shaping. This breakthrough may lead to the creation of new all-optical computers that operate based on light.
A UVA-led research team is working on a photonics-based radar and GPS system that can operate at frequencies up to 110 gigahertz, three times higher than current 5G systems. The system has the potential to provide ultra-stable signals for applications like communications, positioning, and ranging.
Harvard researchers have successfully integrated a high-power laser onto a lithium niobate chip, a major breakthrough in the development of high-performance chip-scale optical systems. The integration enables the creation of fully integrated spectrometers, optical remote sensing, and efficient frequency conversion for quantum networks.
A team of scientists successfully achieved a high-quality strain-free AlN film through graphene-driving strain engineering. The strain-free AlN film grown on graphene/sapphire can be used as a reliable template layer for high-quality epitaxy of DUV-LED devices.
Rice University researchers have developed a customizing method for producing doped graphene with tailored structures and electronic states. The doping process adds elements to the 2D carbon matrix, making it suitable for use in nanodevices such as fuel cells and batteries.
Scientists have discovered a speed limit for computer chips, with one petahertz being the maximum frequency for signal transmission. The research uses ultra-short laser pulses to create electrical currents in dielectric materials, allowing for faster data transmission.
Researchers investigated the shortest possible time scale of optoelectronic phenomena and found that it cannot be increased beyond one petahertz. The experiments used ultra-short laser pulses to create free charge carriers in materials, which were then moved by a second pulse to generate an electric current.
Researchers have created a nonvolatile approach for modulating interlayer excitons, enabling valley-addressable memory. The method uses chemical doping to create a hysteresis effect, allowing for long-term retention of valley-polarized information.
Researchers from NTU Singapore and KIMM create chemical-free printing technique to fabricate semiconductor wafers with nanowires. The method produces highly uniform and scalable wafers, leading to improved performance and high chip yield.
A team of researchers at NGI and NPL demonstrated that slightly twisted 2D transition metal dichalcogenides (TMDs) display room-temperature ferroelectricity. This characteristic can be used to build multi-functional optoelectronic devices with built-in memory functions on a nanometre length scale.
A research team developed hybrid photoreceptors that mimic the retina's rod cells, enabling efficient artificial retina networks. The photoreceptors exhibit excellent optoelectronic properties, including high capacitance and charging & discharging efficiencies.
Researchers review current research on 2D materials, highlighting their potential for quantum light sources and integrated circuits. The scientists also discuss recent advances in hybrid devices and scalable quantum photonic technologies.
Researchers at Tokyo Metropolitan University have developed a scalable way to assemble nanowires into nanoribbons, a promising material for sophisticated electronic devices and catalysts. The method involves weaving together nanowires with chalcogen atoms and heat, resulting in atomically thin ribbons with unique properties.
Researchers have developed a nonvolatile approach to modulate interlayer excitons, enabling valleytronics. The method utilizes chemical doping and electrical gating, resulting in retention times exceeding 60 minutes.
Researchers from Tokyo University of Science developed a high-quality crystalline interface using quasi-homo-epitaxial growth, which eliminated mobility issues and enabled spontaneous electron transfer. This breakthrough could lead to highly efficient flexible solar cells and wearable electronic devices.
A novel, simple, and extremely compact terahertz radiation source has been developed at TU Wien, enabling high intensities and small size. The technology uses resonant-tunnelling diodes and can be used in various applications such as material testing, airport security control, radio astronomy, and chemical sensors.
The project aims to decorate DNA sequences with colourful nano-lights to enable faster read/write processes and novel data encoding concepts. By using unique recognition capabilities of single DNA strands, the consortium plans to develop novel nanomaterials, algorithms, and reader devices for efficient data storage.
A new class of faster and more powerful semiconductors is being developed by UMass Lowell scientists to enhance wireless communication and digital imaging. The $1.7M NSF project aims to improve infrared optoelectronic devices, enabling better intracellular imaging, night vision, and quantum and 5G communication.
Mona Jarrahi, a UCLA professor, has been awarded the IET A F Harvey Engineering Research Prize for her pioneering work in utilizing the electromagnetic spectrum. Her research aims to develop a hybrid methodology for designing systems with operation frequencies beyond traditional transistor technologies.
Researchers have created a new liquid crystal compound with ultra-short helix pitch and spiral ordering, making it ideal for fast-switching devices. The material's thermally and chemically stable structure allows for easy customization of pitch lengths.
Scientists at Chalmers University of Technology discovered a way to create a stable resonator using two parallel gold flakes in a salty aqueous solution. The structure can be manipulated and used as a chamber for investigating materials and their behavior, with potential applications in physics, biosensors, and nanorobotics.
Researchers from OIST and Kyushu University have developed a method to generate a glow-in-the-dark light using organic materials. The new method produces emissions that last for over one hour at room temperature, improving performance by tenfold compared to previous work.
On-chip frequency shifters in the gigahertz range enable precise color shifting for high-speed optical communication. This innovation has significant implications for the development of quantum computers and future network infrastructure.
Researchers have demonstrated ultrafast optical circuit switching for datacenters using integrated soliton microcombs, which can handle increasing bursty datacenter applications while reducing overheads. The proposed architecture employs a central comb system to improve power efficiency and reduce complexity.
Colloidal quantum dot technology enables infrared lasing at room temperature, paving the way for low-cost solution-processed and CMOS integrated lasing sources. The breakthrough discovery may facilitate fully integrated silicon photonics, enabling lower power consumption, higher data rates, and multi-spectral 3D imaging capabilities.
Researchers have developed a revolutionary wireless photoelectric implant that can control the activity of spinal neurons, enabling the study of neural function and the development of new treatments for neurological disorders. The breakthrough technology uses pulses of light to stimulate or inhibit specific spinal-cord neurons, potenti...
A team of researchers at Aarhus University aims to develop an optical sensor using terahertz light to decode the direction of tiny magnetic 'tornadoes' called skyrmions. Skyrmions offer a promising candidate for future bits in computer technology, requiring less power and generating less heat than current methods.
Lehigh University will lead a five-year, $25 million research collaboration to develop new semiconductor materials and scalable manufacturing processes for advanced optoelectronic devices. The initiative aims to transform fields like information technology with quantum technologies.
The Center for Integration of Modern Optoelectronic Materials on Demand will develop new semiconductor materials and scalable manufacturing processes for applications in displays, sensors, and quantum communication. The center aims to connect academic research with industrial and governmental needs, educating a diverse STEM workforce.
Berkeley Lab researchers developed a method to increase the efficiency of LED devices by applying mechanical strain to thin semiconductor films. This approach reduces exciton annihilation, allowing for high-performance LEDs even at high brightness levels.
Researchers investigated thermally activated delayed fluorescence (TADF) with weak light-matter coupling to improve OLED color purity. Using a Fabry-Pérot cavity, they found that weak coupling enhances emission spectra and increases light extraction efficiency.
A novel engineered tunneling layer with enhanced impact ionization improves detection capabilities in graphene/insulator/silicon heterostructure photodetectors. The technique achieves a champion responsivity of ~1.03 AW-1 at a reverse bias of -10 V, showing great potential applications in sensing and communications.
Researchers at Aalto University have discovered that fibrous red phosphorous, when electrons are confined in its one-dimensional sub-units, shows large optical responses. The material demonstrates giant anisotropic linear and non-linear optical responses, as well as emission intensity.
Physicists have established a fundamental limitation of light confinement in nano-scale systems, with a critical dimension threshold of around 250nm. This discovery has implications for various fields such as material science and quantum technologies.
The NTU team created flexible UV light sensors that are 25 times more responsive and 330 times more sensitive than existing sensors. These sensors can be used in wearable devices to monitor personal UV exposure and reduce the risk of skin cancer.
Researchers have developed a self-powered, UV photodetector using coordination nanosheets that demonstrate exceptional photocurrent stability under air exposure. The device, composed of an iron ion bonded to a benzene hexathiol molecule, retains over 94% of its photocurrent after 60 days.
Scientists from Rensselaer Polytechnic Institute have successfully created a novel optoelectronic phenomenon in MoS2 by breaking its inversion symmetry using strain gradients. This breakthrough demonstrates the potential for remote thermal sensing and opens up new possibilities for designing high-efficiency optoelectronics.
Researchers have introduced a new anionic organoborane compound, borafluorene, which is a system of three carbon rings joined at the edges with a boron atom. The team used carbenes to stabilize the elusive anions and demonstrated their potential as chemical building blocks.
The 2Exciting Network aims to train 15 Early Stage Researchers in scientific and soft skills, focusing on 2D semiconductors and optoelectronics. The network brings together academic groups and companies to develop innovative optoelectronic devices for telecommunications and next-generation technology applications.
Researchers used advanced spectroscopy and electronic transport techniques to determine charge accumulation and dynamics in resonant-tunneling diodes. The study aims to develop novel RTDs with optimized charge distribution to enhance photodetection efficiency or minimize optical losses.
Researchers at Skoltech have proposed a photonic device using liquid crystals in optical resonators to study their optical properties. The device can simulate electronic devices using photons, potentially increasing processing speed and reducing energy consumption.
Researchers used machine learning to identify different areas of interest on 2D materials, such as doping, strain, and electronic disorder. This automation could significantly accelerate the application of these materials in next-generation energy-efficient computing and smart-phones.
A team of scientists has developed a protective coating made from ultrathin gallium oxide to shield 2D materials from damage. This innovation enables the use of extremely thin materials in electronics, promising lower energy consumption and increased efficiency.
Researchers have created microfabricated elastic diamonds that can stretch up to 10% without losing their shape. This controlled elasticity changes the diamond's electronic properties, including a reduced bandgap, making it suitable for advanced electronics and quantum information technologies.
Researchers from RUDN University developed a universal approach to synthesizing thienoindolizine derivatives using two- and three-component thienopyridine reactions. This method allows for the formation of compounds with different functional groups, expanding their potential applications in pharmaceutics and optoelectronics.
Researchers developed silicon-polymer hybrid modulators that can transmit 200 gigabits of data per second at up to 110 °C, enabling fast and reliable optical data interconnections in harsh environments. This breakthrough could help reduce datacenter cooling costs by nearly 40%.
Researchers developed a low-cost, flexible optoelectronic cell that can detect light intensity and perceive color. The device uses bandgap-gradient perovskites to sense spectral content with high resolution.
Researchers discovered a two-layer buckled honeycomb structure of blue phosphorene with extremely stable metallic properties, promising applications in nano- and optoelectronics.
Researchers have developed a new method for creating multicolor single-mode microlasers capable of emitting over the full visible spectrum. The lasers are achieved through heterogeneously coupled cavities constructed with three spherical microcavities and distinct gain media.
Researchers have developed a novel powder method for efficiently evaluating electro-optic coefficients, enabling the discovery of promising new crystals. The approach uses second harmonic generation, infrared reflectance spectrum, and Raman spectroscopy to predict electro-optic coefficient magnitude.
Black phosphorus has potential for emerging devices, including medical imaging and environment monitoring, thanks to its versatility and manipulation as a 2D material. The material's ability to tune electron energy levels makes it suitable for electro-optic modulation, which is essential for faster computing and data communication.
Researchers propose a novel vdW heterostructure for MIR light-emission applications using BP and TMDC materials. The BP-WSe2 heterostructure shows a type-I band alignment, enhancing MIR photoluminescence by ~200%. In contrast, the BP-MoS2 heterostructure forms a type-II band alignment, enabling efficient MIR electroluminescence.
Researchers propose orbital engineering to overcome efficiency limitations in high-Al-content AlGaN quantum wells. By inclining the quantum well plane, they modify energy variations induced by orbital coupling, enhancing quantum confinement and radiative transition rates.
A team of scientists has developed a new parametric oscillator in the optoelectronic domain with unique phase-controlled operation, enabling stable and tuneable multimode oscillation. This allows for applications in microwave signal generation, oscillator-based computation, and radio-frequency phase-stable transfer.
Researchers from Osaka University and collaborators uncover quasiparticle interactions in CNTs using terahertz radiation. They identify two key mechanisms explaining data, shedding light on ultrafast electrical conduction and advancing optoelectronic devices.
Scientists from Skoltech developed a novel method to fine-tune the optoelectrical properties of single-walled carbon nanotubes by applying an aerosolized dopant solution. The new approach enables uniform, controllable and easily reproducible aerosol doping, breaking new ground for flexible and transparent electronics.
A new surface tension-controlled crystallization method has been developed to prepare large 2D perovskite single crystals, achieving exceptional device performance. The crystals exhibit anisotropy-dependent optoelectronic properties, with high responsivity and external quantum efficiency.