lasers tagged posts

An international research team has for the first time designed realistic photonic time crystals–exotic materials that exponentially amplify light. The breakthrough opens up exciting possibilities across fields such as communication, imaging and sensing by laying the foundations for faster and more compact lasers, sensors and other optical devices.

“This work could lead to the first experimental realization of photonic time crystals, propelling them into practical applications and potentially transforming industr...

Experiments point the way to solving mystery that keeps clusters hot. Galaxies rarely live alone. Instead, dozens to thousands are drawn together by gravity, forming vast clusters that are the largest objects in the universe.

“Galaxy clusters are one of the most awe-inspiring things in the universe,” said Prof. Emeritus Don Lamb, a University of Chicago astrophysicist and co-author on a new paper published March 9 – one that may point the way towards solving a decades-long mystery.

Scientists have long known that the hydrogen gas in galaxy clusters is searingly hot – about 10 million degrees Kelvin, or roughly t...

Imagine having your own digital personal chef; ready to cook up whatever you want; able to tailor the shape, texture, and flavor just for you; and it’s all at the push of a button. Columbia engineers have been working on doing just that, using lasers for cooking and 3D printing technology for assembling foods.

Under the guidance of Mechanical Engineering Professor Hod Lipson, the “Digital Food” team of his Creative Machines Lab has been building a fully autonomous digital personal chef. Lipson’s group has been developing 3D-printed foods since 2007...

Researchers can now grow twistronic material at sizes large enough to be useful. While an exciting potential area of nanotechnology, twistronics until now has mostly been explored on samples smaller than human hairs. Now researchers can produce samples on the centimetre scale.

2D materials, which consist of a single layer of atoms, have attracted a lot of attention since the isolation of graphene in 2004...