What is it about?

Imagine you have a special flashlight that can adjust the way its light shines. We've made a device like this but for a specific kind of light called "terahertz radiation." Our device uses two materials: platinum (Pt) and cobalt (Co). When we use magnets around it, we can twist and turn the direction of its light. This is like twisting a flashlight beam in any direction you want. We also found out that our new device is quite powerful. Making this device was like finding a way to control a light show, and it might help in designing advanced electronics in the future.

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Why is it important?

In today's rapidly evolving world of technology, controlling the behavior of light at minuscule scales can pave the way for countless innovations. Our work dives deep into this potential by unveiling a unique method to manipulate THz (terahertz) light waves using a Co/Pt spintronic emitter and a simple external magnetic field. Imagine being able to tune and rotate the polarization of these waves full circle, just by adjusting this magnetic field! That's the groundbreaking reality we're presenting. But why is this important? Being able to command the behavior of these THz waves means we can harness them more efficiently for a myriad of applications, from advanced communication systems to medical imaging. Our discoveries have revealed a tight-knit relationship between the emitted pulse energy of these waves and the intensity of the pumping light used. The beauty lies in the details: We have maximized the potential of the Co/Pt structure by creating a specific magnetic environment around it, which in turn acts as a guiding hand for the rotation of THz polarization. In layman's terms, our research has unlocked a powerful method to control and utilize light waves like never before. This new understanding and control can be a game-changer for industries and innovators looking to push the boundaries of what's possible with light-based technologies.


Embarking on this exploration of terahertz (THz) radiation and spintronic emitters wasn't just scientific research; it was a journey of passion and discovery. As we push into the digital future, the mastery of THz radiation becomes a key to unlocking innovations in communication, data transfer, and more. Our work with the Pt(3 nm)/Co(3 nm) structure has shown that bridging the worlds of spintronics and THz technologies is not only possible but revolutionary. Collaboration was our cornerstone, turning challenges into milestones. I truly believe our findings will shape the future of THz optospintronics, opening avenues for advancements we've yet to imagine. Here's to a brighter, faster, more connected tomorrow.

Moscow State Institute of Radio Technology Electronics and Automation

Read the Original

This page is a summary of: Efficient Co/Pt THz spintronic emitter with tunable polarization, Applied Physics Letters, August 2023, American Institute of Physics,
DOI: 10.1063/5.0160497.
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