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PCB007-Sep2022

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88 PCB007 MAGAZINE I SEPTEMBER 2022 My point is that it takes a village to create a team of communicators. When we recognize the personality types of our stakeholders, we can communicate effectively. at challenge has been and still exists. I'm not sure if it's got- ten better or worse. Johnson: What you're describing is easier done when you're working with a coworker and have plenty of time to get data points with them, even if it's remote. It's a little bit more challenging when you're working with a customer or in a more transactional relationship, but it can be done. It's good to be mindful of that and to approach those con- versations, trying to figure that out about each person. Dack: I've learned that building closer working relationships has to do with communication, the ability to communicate, and the ability to altruistically give of yourself to plant seeds that can grow into beneficial relationships for not only yourself and your coworker, but your team, your company, and for the industry. at's a neat little package. Johnson: Well put. I think that's a perfect place to end it. ank you, Kelly. PCB007 Kelly Dack, CIT, CID+, provides DFx centered PCB design and manufacturing liaison expertise for a dynamic EMS provider in the Pacific Northwest while also serving as an IPC design certification instructor (CID) for EPTAC. He is an I-Connect007 columnist. To read past columns, click here. Theoreticians at the MPSD have demonstrated how the coupling between intense lasers, the motion of electrons, and their spin influences the emission of light on the ultrafast timescale. Their work has been published in npj computational materials. Electrons, present in all kinds of matter, are charged particles and therefore they react to the application of light. When an intense light field hits a solid, these particles experience a force, called the Lorentz force, that induces some exquisite dynam- ics reflecting the properties of the material. This results in the emission of light by the electrons at various colors, a well-known phenomenon called high-harmonic generation. The MPSD team under- took the task of under- standing how the light and the spin of the electron can interact in Na 3 Bi, a topo- logical material known as a Dirac semimetal (the three- dimensional analogue of graphene), via an effect known as spin-orbit cou- pling. Understanding bet- ter how spin-orbit coupling influences the electron dynamics on these times- cales is an important step towards understanding the electron dynamics in complex quantum materi- als; it is the spin-orbit coupling that makes quantum materials interesting for future technological appli- cations. It is expected to lead to the next genera- tion of electronic devices, namely topological elec- tronic systems. The authors show how spin-orbit coupling affects the velocity of the electrons within the elec- tron bands of solids, effectively acting like a mag- netic field which depends on the electrons' spin. Changes in the electron velocity can affect the electron dynamics in Na 3 Bi and that this effect can sometimes be detrimental to the generation of high- order harmonics. While this material is non-mag- netic, the team has shown that the spin of the elec- trons is important for the dynamics, as it couples to the potential felt by the electrons, which is modi- fied by the intense applied light-field. (Source: MPSD) When Light and Electrons Spin Together

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