Comprehensive coverage

photons

A two-dimensional projection of the cosmic web as obtained from a supercomputer simulation. Credit: Dr. Ewald Puchwein and the Sherwood-Relics collaboration

New research suggests that dark matter may be made of dark photons

  • 129 תגובות
The new hypothetical particles may be able to explain the observations made by the Cosmic Source Spectrograph on the Hubble Space Telescope
The experimental system, which includes a tiny metal antenna (the two greenish "triangles") and light-emitting particles scattered around it. Photographed with an electron microscope

What are the interactions between light and material in a nanometer antenna aimed at receiving visible light?

  • No comments
Much more detail: nanocrystals as they are seen using the microscopy method developed by scientists at the Weizmann Institute of Science (right) and as they are seen under a normal light microscope (left). Scale: 0.5 micron

Things you see in the small

  • No comments

When light and matter work together

  • 3 תגובות
FLAME system: store light particles on electron orbits. Source: Weizmann Institute magazine.

stop the light

  • 6 תגובות
The photonic big bang: weak disorder creates a weak nanometric separation between photons with opposite spin (red and blue) - "photonic spin-Hall effect". Only in complete disorder does the "photonic explosion" occur - photons with opposite spins split and fill the entire momentum space - the "photonic Rashba effect". The phenomenon describes a topological phase transition that manifests itself in symmetry breaking. The research was inspired by models in cosmology that describe the Big Bang. Silicon nanoantennas are depicted in the picture, and the transition from antennas ordered in their direction to complete disorder is expressed by measuring a sharp increase in entropy (as a measure of disorder). Source: Technion.

The "big bang" in nanooptics

  • One response

molecules of light

  • 4 תגובות
Researchers have shown that two photons, seen here as waves (right and left), can connect a short distance apart. Under certain conditions, these photons can create a state similar to a diatomic molecule, a state shown by the shape of the blue dumbbell in the center of the movement. Figure: NIST

Is it possible to make molecules composed of light?

  • 3 תגובות
The left diagram represents electromagnetic activity with light at the lowest level possible according to the laws of classical physics. On the right, part of the electromagnetic field has been reduced even further. The price is the inability to measure the beam of light. This effect is called "squeezing" (like squeezing juice from an orange) due to the elliptical shape it creates. Illustration: Mete Atature, University of Cambridge.

Scientists "squeezed" a beam of light - photon after photon

  • 3 תגובות
Quantum entanglement. Illustration: Technical University of Vienna

Strong recombination of photons in an optical fiber

  • 21 תגובות
An illustration showing the photonic transistor created by the scientists. At its heart is a single atom (in orange) that directs photons (in yellow) in different directions

The world's first photonic transistor

  • 38 תגובות
Nanocrystals that convert two low-energy photons into one high-energy photon, under an electron microscope

Energy from red to green

  • No comments
The space shuttle Endeavor is docked at the space station as photographed from the Soyuz spacecraft that left the station. Photo: Paolo Nespoli, European Space Agency

"A startling action from a distance" inside the International Space Station

  • 74 תגובות
A quantum computer. Illustration: IBM

A single atom capable of storing quantum information

  • 42 תגובות
Bending of light rays: Illustration: Tel Aviv University

Scientists at Tel Aviv University have found a new method for bending light rays

  • 12 תגובות
Photons emitted from a coherent laser beam in a US military experiment. Photo: from Wikipedia

Technion researchers discovered and developed new light sources that emit pairs of photons

  • 19 תגובות
Threading light into a nanometric hole in the shape of a "pretzel" and spiral grooves on the surface of a gold layer - an optical nanometer screw. On the right - screwing the light into the hole, on the left - electron microscope images of the nanometer optical screw.

The Technion researchers managed to "screw" light and inject it into a nanometer hole

  • 8 תגובות
Photographing atoms using four-dimensional microscopy

Scientists were able to observe photons with the help of electrons

  • 9 תגובות

Researchers from the Technion and "Imperial College" in London have designed a "photon cannon" that shoots bundles of entangled photons

  • 19 תגובות
Science website logo
SEARCH