Donegans Microcavities: quantum dots emitting light in green and red
Scientists have successfully produced the most efficient light bulb ever – but on the microscopic scale. Researchers at Trinity College, Dublin have discovered a technique which significantly improves the output of light from quantum dots, and also allows their light to be focussed and manipulated easily. Their findings are published today in the Institute of Physics journal Semiconductor Science and Technology.
Dr Yuri Rakovich and Dr John Donegan from Trinity College, Dublin working with researchers at the universities of Hamburg and Munich, have successfully placed quantum dots (the most efficient light-bulb in the world) onto a tiny polymer sphere.
Scientists have known for some time that quantum dots (tiny particles made from certain semiconducting materials) have numerous applications as they are capable of producing light without wasting any energy as heat. They are the basic unit of quantum computers – computers around 10,000 times faster that the fastest computer currently in use. John Donegan’s team have found that they can make quantum dots more efficient than ever. By embedding quantum dots on the surface of a microsphere they can enhance the output of light from these quantum dots by a factor of 20 and - because these structures are spherical - they allow the light emitted from the quantum dots to be focussed into a fine beam which can be moved around easily by the researcher.
Open, flexible assembly platform for optical systems
23.01.2017 | Fraunhofer-Institut für Produktionstechnologie IPT
A big nano boost for solar cells
18.01.2017 | Kyoto University and Osaka Gas effort doubles current efficiencies
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
23.01.2017 | Health and Medicine
23.01.2017 | Physics and Astronomy
23.01.2017 | Process Engineering