With the placement of a sheet of graphene, researchers at Columbia University have transformed an originally passive photonic integrated circuit into an active generator of microwave photonic signals. The device performs parametric wavelength conversion at telecommunication wavelengths, offering a glimpse at communications using very little power.
Materials experts in Japan have recently developed an advanced self-assembling technology for semiconductor quantum dots called droplet epitaxy. This method has produced quantum dots with the world’s highest surface density, greatly exceeding the previously reported value.
As electronic devices get smaller, they are becoming more vulnerable to contamination through the presence of impurities. Using a Fourier transform infrared (FT-IR) microscope such as Bruker Optics’ LUMOS, contaminations in the low micrometer range can be identified. In this white paper, Bruker demonstrates how FT-IR can be used to determine surface contamination on the soldering contact of a surface mounted device.
Soitec and Chongqing Silian Optoelectronics Science & Technology Co. Ltd. have partnered to jointly develop gallium nitride (GaN) template wafers using hydride vapor phase epitaxy (HVPE). The resulting GaN template wafers present cost savings in manufacturing light-emitting diodes.
TEL NEXX Inc., a wholly owned subsidiary of Tokyo Electron U.S. Holdings, has announced a new multi-year joint development program in 3D semiconductor packaging with IBM. The program focuses on meeting IBM's rigorous technology requirements through its partners in the Semiconductor Research and Development Alliance.
One bit of digital information stored on a hard disk currently consists of about 3 million magnetic atoms. Researchers in Germany and Japan have now developed a magnetic memory with one bit per molecule. Using an electric pulse deliver by atomic force microscopy, the metal-organic molecule can be switched reliably between a conductive, magnetic state and a low-conductive, non-magnetic state.
Memory-chip maker Micron Technology Inc. has agreed to buy Elpida Memory Inc. for approximately $750 million in cash in a deal that would boost its wafer manufacturing capacity by about 50%. Elpida specializes in dynamic random access memory chips used in mobile phones and computers, and has been developing a plan of reorganization since filing for the largest manufacturing bankruptcy ever in Japan earlier this year.
Melanin could soon be the face of a new generation of biologically friendly electronic devices used in applications such as medical sensor and tissue stimulation treatments. An international team of scientists has published a study that, for the first time, gives insight into the electrical properties of this pigment and its biologically compatible "bioelectronic" features.
Long-time Japanese rivals Sony Corp. and Panasonic Corp. are working together to develop next-generation TV panels based on organic light-emitting diode technology. The move is a reversal of decades of rivalry as they try to catch up with South Korea's Samsung Electronics.
A drawing program and a 3D printer: These might be the only tools necessary for production of microstructures and nanostructures for devices and sensors of the future. With a new printed 3D silicon manufacturing technology, researchers at Sweden hope to greatly reduce the cost and complexity of creating these building blocks.
In the not-too-distant future, scientists may be able to use DNA to grow their own specialized materials, thanks to the concept of directed evolution. University of California, Santa Barbara scientists have, for the first time, used genetic engineering and molecular evolution to develop the enzymatic synthesis of a semiconductor.
Physicists in Germany have recently provided new insights into spintronics: In ultra-thin topological insulators, they have identified spin-polarized currents, which were first theoretically predicted six years ago. They have also presenteda method of application for the development of new computers.
University of Utah physicists developed an inexpensive, highly accurate magnetic field sensor for scientific and possibly consumer uses based on a “spintronic” organic thin-film semiconductor that basically is “plastic paint.” Its inventors say the new type of magnetometer also resists heat and degradation, works at room temperature and never needs to be calibrated.
Continued miniaturization and increased component density in today’s electronics have pushed heat generation and power dissipation to unprecedented levels. Current technology is keeping pace, but greatly adding to the size and weight of electronics. As a solution DARPA pursuing a new thermal management strategy that place microfluidic cooling inside the chip substrate.
When searching for the technology to boost computer speeds and improve memory density, the best things come in the smallest packages. A relentless move toward smaller and more precisely defined semiconductors has prompted researchers at Argonne National Laboratory to develop a new technique that can dramatically improve the efficiency and reduce the cost of preparing different classes of semiconducting materials.
An important chemical species, molecular oxygen is linear, has an anisotropic shape, and spins from two unpaired electrons. However, until now, we didn’t know how these properties influenced important oxidation reactions. Researchers in Japan have now reported development of the world's first molecular oxygen beam that can designate the alignment of the molecular axis and spin direction.
A materials scientist at Michigan Technological University has discovered a chemical reaction that not only eats up the greenhouse gas carbon dioxide, it also creates something useful. And, by the way, it releases energy.
With the advent of the solid-state transistor and semi-conductor-based flat panel display technology, the vacuum tube has virtually disappeared from consumer electronics. But a team of researchers in Korea and at NASA’s Ames Research Center have combined the best traits of both technologies to create a vacuum channel transistor just 150 nm long.
A year after a researcher at Linköping University in Sweden built a fully functional field-effect transistor from plastic, another scientist at the same institution has shown that it is possible to control these transistors with great precision, allowing the device to function as a logic circuit.
There's nothing worse than a shonky pool table with an unseen groove or bump that sends your shot off course. A new study has found that the same goes at the nano-scale, where the "billiard balls" are tiny electrons moving across a "table" made of the semiconductor gallium arsenide.
After studies involving advanced simulations of nanoscale magnetic and materials phenomena, a team of scientists in Germany have proposed making use of magnetic moments in chains of iron atoms to allow information to be transported on the nanoscale in a fast and energy-efficient manner. The scheme, demonstrated in experiments, would work over a wide temperature range, remaining largely unaffected by external magnetic fields.
Gallium nitride, a semiconductor material found in bright lights since the 1990s, is used in wireless applications because of its high efficiency and high voltage operation. However, it’s difficult to remove heat from GaN electronics, which limits applications and markets. Researchers at the University of California, Riverside, have made a material from graphene that does the job, and it looks a lot like a patterned quilt.
White-light quantum dots made from cadmium selenide can convert blue light produced by a light-emitting diode into a warm white light similar to that generated by an incandescent bulb. But their performance has been poor until recent development breakthroughs have improved efficiency from just 3% originally to as high as 45%.
By using diamond-tipped tools to apply pressure, a team led by Johns Hopkins engineers has discovered some previously unknown electrical properties of a common memory material, a mix of germanium, antimony, and tellurium called GST. The discovery should make GST more useful for electronics developers by allowing memory formats that retain data more quickly, last longer, and allow far more capacity.
University of California, Los Angeles researchers and their colleagues have developed a novel screening technology that allows large batches of metal-oxide nanomaterials to be assessed quickly, based on their ability to trigger certain biological responses in cells as a result of their semiconductor properties.