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It seemed impossible, but it is not-physicists will even be able to create ultra-efficient wave control in future technology.
It was theoretically an insurmountable barrier, but a team of Postech researchers proved that for them there are few impossible. For the first time, the Complete confinement of mechanical waves in a single resonator.
O, published in Physical Review Letters on April 3, unlocks a key piece for the resolution of the centenary puzzle of the continuum -linked states (BIC).
The idea that this feat would be possible to obtain – under specific conditions, it may be possible that waves remain confined indefinitelywithout energy escape – was first formulated about 100 years ago by Nobel Prize John von Neumann and Eugene Wigner.
Now, the BIC has been performed in a single particle, through a Cylindrical granular particle systemwhich consist of small solid sticks made of quartz.
Adjusting the way cylinders touch, it was possible to control the way the mechanical waves interact within the contact limits. Scientists have even been able to reach quality factors (Q factors) greater than 1000.
“It’s like throwing a stone to a lake stopped and seeing that ripples remain still, vibrating only in place,” the main author of the study, Yeongtae Jang. “Although the system allows wave movement, the energy does not spread – it is perfectly confined.”
Resonance – wave amplification in specific frequencies – is based on many everyday technologies, such asmartphones, ultrasound images and radio systems. However, conventional resonators gradually dissipate the energy, which requires a continuous input to maintain its operation.
This investigation proves that it is possible to exist a Ultra-efficient wave control in future technology.
“We broke a longtime theoretical border ”comments Professor Junsuk RHO, who leads the investigation. “Although this is still in the fundamental investigation phase, implications are significant – from low loss energy devices to next generation detection and signaling technologies.”
