Light-emitting diodes (LEDs) have revolutionized modern lighting and sensing technology. From applications in our homes to industry, LEDs are used for all lighting applications, from indoor lighting over TV screens to biomedicine. ...
Optics & Photonics
Jan 9, 2024
3
103
(PhysOrg.com) -- Building a nuclear gamma-ray laser has been a challenge for scientists for a long time, but a new proposal for such a device has overcome some of the most difficult problems. In the new study, Eugene Tkalya ...
A few minutes into the life of the universe, colliding emissions of light energy created the first particles of matter and antimatter. We are familiar with the reverse process—matter generating energy—in everything from ...
Optics & Photonics
May 29, 2020
26
7864
(PhysOrg.com) -- In 1974, Stephen Hawking predicted that black holes emit thermal radiation due to quantum effects, which causes the black holes to lose mass and perhaps ultimately vanish. But despite numerous attempts to ...
(PhysOrg.com) -- Researchers at the Centre of Molecular Materials for Photonics and Electronics (CMMPE) (part of the Department's Photonics Research Group at the University of Cambridge) are leading the way towards the development ...
Optics & Photonics
Apr 20, 2009
4
0
In an electron microscope, electrons are emitted by pointy metal tips, so they can be steered and controlled with high precision. Recently, such metal tips have also been used as high precision electron sources for generating ...
Optics & Photonics
Nov 15, 2016
2
2313
(PhysOrg.com) -- Physicists at the University of California, Riverside report that they have discovered a new way to create positronium, an exotic and short-lived atom that could help answer what happened to antimatter in ...
General Physics
Jul 11, 2011
14
0
Scientists from the National Physical Laboratory (NPL) and Imperial College London demonstrate, for the first time, a solid-state 'MASER' capable of operating at room temperature, paving the way for its widespread adoption ...
General Physics
Aug 15, 2012
6
0
Twenty years ago, Philip Platzman and Allen Mills, Jr. at Bell Laboratories proposed that a gamma-ray laser could be made from a Bose-Einstein condensate (BEC) of positronium, the simplest atom made of both matter and antimatter ...
General Physics
May 1, 2014
0
1
When molecules are excited, they can give rise to a variety of energy conversion phenomena, such as light emission and photoelectric or photochemical conversion. To unlock new energy conversion functions in organic materials, ...
