Recent Comments

    Category Physics

    Building ‘OLEDs’ from the ground up for better Electronics

    June 7, 2017, Categories  Physics, Technology/Electronics

    Novel Strategy for Photopatterning Emissive Polymer Brushes for Organic Light Emitting Diode Applications

    Novel Strategy for Photopatterning Emissive Polymer Brushes for Organic Light Emitting Diode Applications

    From smartphones to TVs and laptops, light emitting diode (LED) displays are ubiquitous. OLEDs (where the O denotes they are organic, or carbon-based) are among the most energy efficient of these devices, but they generally have higher production costs due to the laborious fabrication processes needed to arrange them properly. Today in ACS Central Science, researchers introduce a new way to efficiently create patterns of OLEDs.

    In an LED display, the emissions from red, green and blue diodes are blended to create the white and colored light necessary to render images. It is crucially important to precisely position the different types of diodes in relation to one another...

    Read More

    Viability of Quantum Satellite Communications

    June 7, 2017, Categories  Physics, Technology/Electronics, Environment/Geology

    Flight paths for the 7km arc and line, followed from left to right. The star indicates the location of the ground station at Smith Falls{Montague Airport. The inner portions represent where the quantum link was active. Photo produced using GPSVisualizer.com, map data c 2016 Google, imagery c 2016 Cnes/Spot Image, DigitalGlobe, Landsat, New York GIS, USDA Farm Service Agency.

    Flight paths for the 7km arc and line, followed from left to right. The star indicates the location of the ground station at Smith Falls{Montague Airport. The inner portions represent where the quantum link was active. Photo produced using GPSVisualizer.com, map data c 2016 Google, imagery c 2016 Cnes/Spot Image, DigitalGlobe, Landsat, New York GIS, USDA Farm Service Agency.

    Researchers in Canada have taken a significant step towards enabling secure quantum communication via moving satellites, as announced by the Canadian Government in April 2017. Their study demonstrates the first quantum key distribution transmissions from a ground transmitter to a quantum payload on a moving aircraft...

    Read More

    Engineer Unveils new spin on Future of Transistors with Novel Design

    June 5, 2017, Categories  Physics, Chemistry/Nanotechnology

    All-carbon spin logic gate. Figure 1 Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRL determine the magnetic fields B and GNR edge magnetization, and thus the magnitude of the output current IGNR.

    All-carbon spin logic gate.  Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRL determine the magnetic fields B and GNR edge magnetization, and thus the magnitude of the output current IGNR.

    All-carbon spin logic gate. Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRLdetermine the magnetic fields B and GNR edge magnetization, and ...

    Read More

    ‘Scrambled light’ Wavemeter Breakthrough

    June 5, 2017, Categories  Physics, Technology/Electronics

    Wavemeter setup: (a) Laser light is delivered into an integrating sphere (S) of diameter Dsphere, via an angled single mode fibre (SMF), where it undergoes numerous scattering events. A camera (C) located at a distance L from the integrating sphere observation port captures the speckle patterns. A wavemeter or Fabry–Perot interferometer (REF) is used to benchmark the speckle wavemeter. (b) An example of a speckle pattern captured by the camera at a wavelength of 780 nm with an image size of 512 × 512 pixels (with individual pixels of 4.5 × 4.5 μm2). The white scale bar denotes 200 pixels, and the colour bar shows the intensity in normalized units.

    Wavemeter setup: (a) Laser light is delivered into an integrating sphere (S) of diameter Dsphere, via an angled single mode fibre (SMF), where it undergoes numerous scattering events. A camera (C) located at a distance L from the integrating sphere observation port captures the speckle patterns. A wavemeter or Fabry–Perot interferometer (REF) is used to benchmark the speckle wavemeter. (b) An example of a speckle pattern captured by the camera at a wavelength of 780 nm with an image size of 512 × 512 pixels (with individual pixels of 4.5 × 4.5 μm2). The white scale bar denotes 200 pixels, and the colour bar shows the intensity in normalized units.

    A breakthrough innovation in the measurement of lasers can measure changes one millionth of the size of an atom and could revolutionize...

    Read More