<p>Scientists from the University of Ljubljana in Slovenia have discovered a novel application for soap bubbles after turning them into laser sensors with capability for detecting electric fields and pressure.</p>

<h2><strong>How the breakthrough was achieved?</strong></h2>

<p>"To get lasing, almost any bubble is fine. We’ve used regular hand soaps or a mixture that you can buy for children. You just need to put a small amount of fluorescent dye inside, and it works perfectly," Matjaž Humar at the University of Ljubljana in Slovenia, who produced the bubble lasers with Zala Potočnik, also at the University of Ljubljana told the New Scientist.</p>

<p><strong>Also read |&nbsp;<a href="https://www.wionews.com/science/scientists-discover-superconductivity-breakthrough-for-next-age-electrical-transmission-570740">Scientists achieve superconductivity breakthrough for next-age electrical transmission</a></strong></p>

<p>The duo achieved the breakthrough using regular hand soaps or child-friendly bubble mixtures.&nbsp;</p>

<p>They reportedly added small amount of fluorescent dye to the bubble mixture, creating a medium for laser generation.</p>

<h2><strong>The interior volume of bubbles: Defining factor</strong></h2>

<p>Unlike conventional lasers that rely on mirrors to construct a cavity, the researchers used the interior volume of bubbles, some as small as half a millimetre and others measuring a few centimetres in diameter.&nbsp;</p>

<p>This gave them necessary space for light to bounce back and forth, a crucial component for lasing.</p>

<p>The addition of fluorescent dye to the bubble mixture serves as the light-amplifying material.&nbsp;</p>

<p>When illuminated, the dye emits light, forming the third essential component for lasers.</p>

<p><strong>Also watch |&nbsp;UK to build world's most powerful laser</strong></p>

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<p>External light, directed onto the bubble through an optical fibre and a focusing lens, triggers the bubble to produce its own laser light.</p>

<p>Humar and Potočnik further experimented with liquid crystals as an alternative to soap, to make bubble lasers stable.&nbsp;</p>

<h2><strong>What does it mean?</strong></h2>

<p>The bubble lasers show an unprecedented level of sensitivity, capable of detecting pressure changes as minute as 0.001 per cent of atmospheric pressure.&nbsp;</p>

<p>Even on clear days without thunderstorms generating electricity, they can sense the electric fields in the atmosphere.</p>

<p>Miguel Bandres at the University of Central Florida told the NewScientist that the team creatively combined the concept of "micro-ring lasers".&nbsp;</p>

<p>"They take these ideas to a totally new platform, thereby opening the door to a plethora of novel applications," he said.</p>

<p><em>(With inputs from agencies)</em></p>


Scientists from the University of Ljubljana in Slovenia have discovered a novel application for soap bubbles after turning them into laser sensors with capability for detecting electric fields and pressure.

Scientists from the University of Ljubljana in Slovenia have discovered a novel application for soap bubbles after turning them into laser sensors with capability for detecting electric fields and pressure. How the breakthrough was achieved? "To get lasing, almost any bubble is fine. We’ve used regular hand soaps or a mixture that you can buy for children. You just need to put a small amount of fluorescent dye inside, and it works perfectly," Matjaž Humar at the University of Ljubljana in Slovenia, who produced the bubble lasers with Zala Potočnik, also at the University of Ljubljana told the New Scientist. Also read | Scientists achieve superconductivity breakthrough for next-age electrical transmission The duo achieved the breakthrough using regular hand soaps or child-friendly bubble mixtures. They reportedly added small amount of fluorescent dye to the bubble mixture, creating a medium for laser generation. The interior volume of bubbles: Defining factor Unlike conventional lasers that rely on mirrors to construct a cavity, the researchers used the interior volume of bubbles, some as small as half a millimetre and others measuring a few centimetres in diameter. This gave them necessary space for light to bounce back and forth, a crucial component for lasing. The addition of fluorescent dye to the bubble mixture serves as the light-amplifying material. When illuminated, the dye emits light, forming the third essential component for lasers. Also watch | UK to build world's most powerful laser × External light, directed onto the bubble through an optical fibre and a focusing lens, triggers the bubble to produce its own laser light. Humar and Potočnik further experimented with liquid crystals as an alternative to soap, to make bubble lasers stable. What does it mean? The bubble lasers show an unprecedented level of sensitivity, capable of detecting pressure changes as minute as 0.001 per cent of atmospheric pressure. Even on clear days without thunderstorms generating electricity, they can sense the electric fields in the atmosphere. Miguel Bandres at the University of Central Florida told the NewScientist that the team creatively combined the concept of "micro-ring lasers". "They take these ideas to a totally new platform, thereby opening the door to a plethora of novel applications," he said. (With inputs from agencies)

Scientists create lasers from soap bubbles for handheld sensing devices

<p>Chinese researchers have developed a technology that they claim could see an object hidden over a kilometre far.&nbsp;</p>

<p>The scientists say that non-line-of-sight (NLOS) imaging could be used for everything from policing to defence, reports SCMP.&nbsp;</p>

<p>According to the research paper published earlier this month in the Proceedings of the National Academy of Sciences, the researchers at the University of Science and Technology set up a laster emitter<br />
at their campus in Urban Shanghai and hid a mannequin behind a flat-screen inside a flat 1.43 km away.&nbsp;</p>

<p>A pulse laser was thrown onto a wall inside the flat, which scattered the light in different directions.&nbsp;</p>

<p><strong>Also read | <a href="https://www.wionews.com/world/israel-unveils-laser-guided-precision-mortar-system-as-icc-probes-possible-war-crimes-370615">Israel unveils laser-guided 'precision' mortar system as ICC probes possible war crimes</a></strong></p>

<p>Some of the photons were reflected on to the mannequin, while others travelled to a sensor placed next to the laser emitter.</p>

<p>The photons that struck the hidden object were then reflected back onto the wall and bounced back a third time to hit the sensor.</p>

<p>The researchers then calculated how far each part of the mannequin was placed and recreate a three-dimensional image through an algorithm.&nbsp;</p>

<p>"This range is about three orders of magnitude longer than previous experiments," the scientists said in the article.&nbsp;</p>

<p>"The results will open avenues for the development of NLOS imaging techniques and relevant applications to real-world conditions."</p>


Chinese researchers have developed a technology that they claim could see an object hidden over a kilometre far. The scientists say that non-line-of-sight (NLOS) imaging could be used for everything from policing to defence, reports SCMP.

Chinese researchers have developed a technology that they claim could see an object hidden over a kilometre far. The scientists say that non-line-of-sight (NLOS) imaging could be used for everything from policing to defence, reports SCMP. According to the research paper published earlier this month in the Proceedings of the National Academy of Sciences, the researchers at the University of Science and Technology set up a laster emitter at their campus in Urban Shanghai and hid a mannequin behind a flat-screen inside a flat 1.43 km away. A pulse laser was thrown onto a wall inside the flat, which scattered the light in different directions. Also read | Israel unveils laser-guided 'precision' mortar system as ICC probes possible war crimes Some of the photons were reflected on to the mannequin, while others travelled to a sensor placed next to the laser emitter. The photons that struck the hidden object were then reflected back onto the wall and bounced back a third time to hit the sensor. The researchers then calculated how far each part of the mannequin was placed and recreate a three-dimensional image through an algorithm. "This range is about three orders of magnitude longer than previous experiments," the scientists said in the article. "The results will open avenues for the development of NLOS imaging techniques and relevant applications to real-world conditions."

Chinese scientists develop technology that can detect hidden object over a kilometre away

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Scientists create lasers from soap bubbles for handheld sensing devices

Chinese scientists develop technology that can detect hidden object over a kilometre away