Light
Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that the human eye perceives. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarization. Light is a transverse wave and does not need any medium to travel. The speed of light in a vacuum is a fundamental physical constant, the currently accepted value of 299,792,458 meters per second. Light can also be described as a stream of photons, massless packets of energy.
Generating light through use of pre-existing defects in semiconductor materials
The new method provides an alternative approach to develop InGaN red light emitters, which traditionally suffer from poor efficiency
Liquid light shows social behavior, study
The photons try to stay together as a group by choosing the path that leads to the lowest losses.
Exotic matter-wave states revealed in condensed matter physics
Optically generated quantum fluids of light reveal exotic matter-wave states in condensed matter physics.
A new optical amplifier could revolutionize optical communication
It is compact enough to integrate into a chip just millimeters in size.
The nanophotonics orchestra presents: Twisting to the light of nanoparticles
A new physical effect in chiral (twisted) nanoparticles.
A way to get photons to interact with atoms
Light-matter interactions propel quantum technologies forward.
Scientists raised and realized noiseless photon echo (NLPE) protocol
It achieved solid quantum memory with high fidelity.
Transparency of metallic oxides explained
This new model breaks with the paradigm established so far in the field of condensed matter physics.
Sound-light pulses observed in 2D materials for the first time
Scientists recorded the propagation of combined sound and light waves in atomically thin materials.
Making more efficient low-cost light-emitting materials by swapping atoms
Atom swapping could lead to ultra-bright, flexible next-generation LEDs.