Phys.org January 7, 2020 Most of the previous studies demonstrated spatial focusing to the speckle grain size, and manipulation of the temporal properties of the achieved focus. Researchers in Australia demonstrate an approach to control the total temporal impulse response, not only at a single speckle grain but overall spatial degrees of freedom (spatial and polarization modes) at any arbitrary delay time through a multimode fiber. Global enhancement or suppression of the total light intensity exiting a multimode fibre is shown for arbitrary delays and polarization states. This work could benefit to applications that require pulse delivery in disordered media, […]
Tag Archives: S&T -Australia
Mind the gap – new wide-bandgap topological insulator
Nanowerk December 17, 2019 To construct electronic devices with low-energy consumption the low-dissipation surface states of topological insulators (TIs) are widely employed. But practical applications of TIs have been severely limited by the small electronic bandgaps in most known materials. To achieve stability researchers in Australia used a scheme based on co-substitution of sulphur balanced by a small amount of larger vanadium and tin ions resulting the complex material Vx:Bi1.08-xSn0.02Sb0.9Te2S. They demonstrated that the surface dominant transport behavior can survive above 50 K. The robust surface states in V doped single crystal systems provide an ideal platform to study the Dirac […]
New tool to predict the global spread of dengue
Science Daily December 4, 2019 According to the World Health Organisation, around half the world’s population is at risk of contracting dengue. International travelers significantly contribute to dengue’s rapid and large-scale spread by importing the disease from endemic into non-endemic countries. Researchers in Australia consider international air travel volumes to construct weighted networks, representing passenger flows between airports. They calculate the probability of passengers being infected with dengue which depends on the destination, duration and timing of travel. The findings shed light onto dengue importation routes and reveal country-specific reporting rates that have been until now largely unknown. The research […]
New spin directions in pyrite an encouraging sign for future spintronics
Science Daily November 12, 2019 Generating and manipulating out-of-plane spins without applying an external electric or magnetic field has been a key challenge in spintronics. Researchers in Australia demonstrate for the first time that pyrite-type (Pyrite is an iron-sulfide mineral that displays multiple internal planes of electronic symmetry) crystals can host unconventional energy- and direction-dependent spin textures on the surface, with both in-plane and out-of-plane spin components, in sharp contrast to spin textures in conventional topological materials. The findings provide a platform for experimentalists to detect and exploit unconventional surface spin textures in future spin-based nanoelectronic devices…read more. Open Access […]
Experimental observation of a new class of materials: Excitonic insulators
Science Daily July 31, 2019 In a new study researchers in Australia have found evidence of a new phase of matter predicted in the 1960s: the excitonic insulator. It is a new phase of matter in the critical transition point between insulator and metal. The researchers studied antimony nanoflake using scanning tunneling microscopy and spectroscopy. They observed the unique feature of the excitonic insulator, a charge density wave (CDW) without periodic lattice distortion and a gap induced by the CDW near the Fermi surface, suggesting that the antimony (Sb(110)) nanoflake is an excitonic insulator. They are predicted to host many […]
Autonomous drones that can ‘see’ and fly intelligently
Phys.org February 6, 2019 Researchers in Australia used an Xbox Kinect sensor as an input camera to help drones ‘see’ their environment. They developed algorithms to process the video footage image by image, to help the drones know their own speed, motion, and to detect obstacles so they can reach their target position. The algorithm uses the images the drone ‘sees’ and compares the same pixel to detect the differences in 2-D images and calculates the speed and location of drones in 3-D space. As the RGB-D cameras are still in their infancy, they suffer from performance drawbacks such as […]
Tests show integrated quantum chip operations possible
Phys.org October 30, 2018 An international team of researchers (Australia, the Netherlands, Japan, USA – industry) has demonstrated an integrated device platform incorporating a silicon metal-oxide-semiconductor double quantum dot that is capable of single-spin addressing and control via electron spin resonance, combined with high-fidelity spin readout in the singlet-triplet basis. They have shown that they can combine this with a special type of quantum readout process known as Pauli spin blockade, a key requirement for quantum error correcting codes that will be necessary to ensure accuracy in large spin-based quantum computers. The new integrated design can be manufactured using well-established […]