Decorative image. Scientists have found a new way to control light waves. (Image source: Sebastián Brito via Unsplash)
Scientists have developed a new method to precisely control tiny waves of light and electrons, a breakthrough that could lead to lightning-fast communications and more powerful quantum devices.
In a breakthrough, researchers at the CNR Istituto Nanoscienze have demonstrated a new way to precisely tune the behavior of light and electrons in the terahertz (THz) frequency range — an underexplored part of the electromagnetic spectrum. This achievement, detailed in the journal Light: Science and Applications, could lead to tunable and energy-efficient devices for a wide range of applications — from ultra-fast communication to quantum computing.
While light can be used to transmit information in nanoscale devices, scientists have been faced with the challenge of confining and guiding light at the nanoscale due to its relatively large wavelength. This new research focused on hybrid waves called Dirac plasmon polaritons (DPPs), which can be squeezed into spaces hundreds of times smaller than their natural wavelength.
To achieve this, the researchers engineered a special class of materials called topological insulators. They created tiny, laterally coupled strips (metaelements) from an advanced material called epitaxial Bi2Se3. By precisely adjusting the microscopic gaps between these strips, the research team was able to manipulate the wavelength of the THz waves.
The studies yielded two positive results. The team successfully shortened the wavelength by 20% and at the same time, the waves covered about 50% more distance before losing a critical amount of energy. These two achievements address the main challenges that have hindered the adoption of DPPs in real-world applications.
This level of control over THz light could enable the development of devices that can transmit data at higher rates than available in present-day devices. It could also open the door to a new era in quantum computing, medical imaging, and photonics.
Chibuike Okpara – Tech Writer – 184 articles published on Notebookcheck since 2024
I have always been fascinated by technology and digital devices my entire life and even got addicted to it. I have always marveled at the intricacy of even the simplest digital devices and systems around us. I have been writing and publishing articles online for about 6 years now, just about a year ago, I found myself lost in the marvel of smartphones and laptops we have in our hands every day. I developed a passion for learning about new devices and technologies that come with them and at some point, I asked myself, “Why not get into writing tech articles?” It is useless to say I followed up the idea — it is evident. I am an open-minded individual who derives an infinite amount of joy from researching and discovering new information, I believe there is so much to learn and such a short life to live, so I put my time to good use — learning new things. I am a ‘bookworm’ of the internet and digital devices. When I am not writing, you will find me on my devices still, I do explore and admire the beauty of nature and creatures. I am a fast learner and quickly adapt to changes, always looking forward to new adventures.