A joint China-Austria team has performed quantum key distribution between the quantum-science satellite Micius and multiple ground stations located in Xinglong (near Beijing), Nanshan (near Urumqi), and Graz (near Vienna). Such experiments demonstrate the secure satellite-to-ground exchange of cryptographic keys with ?kHz rate during the passage of the satellite Micius over a ground station. Using Micius as a trusted relay, a secret key is created between China and Europe at locations separated up to 7,600 km on the Earth.
Northwestern University researchers have developed a first-of-its-kind technique for creating entirely new classes of optical materials and devices that could lead to light bending and cloaking devices -- news to make the ears of Star Trek's Spock perk up. Using DNA as a key tool, the scientists took gold nanoparticles of different sizes and shapes and arranged them in two and three dimensions to form optically active superlattices. The structures could be programmed to exhibit almost any color across the visible spectrum.
Researchers have developed the first instrument that can provide a detailed image of the entire eye that can produce higher quality images than currently available.
For the first time, researchers have shown that an optical fiber as thin as a human hair can be used to create microscopic structures with laser-based 3-D printing. The innovative approach might one day be used with an endoscope to fabricate tiny biocompatible structures directly into tissue inside the body.
Scientists from Brazil, China and Italy have reached a model to map out the phases in which silica (SiO2) transforms into coesite rock, by analyzing how the inelastic scattering of light among molecules changes according to pressure variation. Computer simulation was required in the study of coesite, found on a crater produced by a comet or asteroid that hit Mexico and led to extinction of the dinosaurs.
The gas-solid reaction method provides a full coverage of the perovskite film and avoids the damage from the organic solvent, which is beneficial for the light capture and electrons transportation, resulting in a faster response time and stability for the perovskite photodetector.
Data travels through thousands of miles of fiber optic cables underneath the world's oceans--via pulses of light. And according to experts, the data in these cables is at great risk of being intercepted. However, a newly designed frequency comb--recently developed by researchers at the USC Viterbi School of Engineering might be an effective tool for data encryption.
Material developed in Brazil measures temperatures in the range of 80-750 kelvin (-193 °C to 476 °C) and, as described in Scientific Reports, could be used in manufacturing and biological processes. Besides being an optical device, which makes unnecessary to have contact with the object, the sensor is equipped with a detector that can gauge how temperature affects the wavelength of light.
A type of quantum dot that has been intensively studied in recent years can reproduce light in every color and is very bright. An international research team that includes scientists from ETH Zurich has now discovered why this is the case. The quantum dots could someday be used in light-emitting diodes.
Nanophotonic devices have direct applications for use in ultra-high resolution microscopes, solar energy harvesting, optical computing and targeted medical therapies.