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<!doctype html><html lang=en><head><meta charset=UTF-8><meta http-equiv=X-UA-Compatible content="ie=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><meta name=author content><meta name=description content="This summer, I had the pleasure of working under Jonah Adelman in Prof. Stephen Leone&rsquo;s group at UC Berkeley. Our group specializes in attosecond transient absorption pump-probe spectroscopy via high-harmonic generation, and my lab specifically focuses on applying this technique towards solid-state materials. Over the course of two months, my main objective was familiarizing myself with the first principles governing this spectroscopic method, and to conduct an experiment of my own, namely cross-polarizing the VIS-NIR pump beam and XUV probe beam in our setup to quantify the potential differences in absorption in elemental Tellurium."><meta name=keywords content><meta name=robots content="noodp"><meta name=theme-color content><link rel=canonical href=https://connerchu.com/research/atas/><title>Cross-Polarized Attosecond Transient Absorption Spectroscopy of Elemental Tellurium :: Conner Chu
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<span class=logo__cursor style=visibility:hidden></span></div></a><span class=header__right><nav class=menu><ul class=menu__inner><li><a href=/photography/>Photography</a></li><li><a href=/research/>Research</a></li><li><a href=/resume/>Resume</a></li><li><a href=/tidbits/>Tidbits</a></li></ul></nav><span class=menu-trigger><svg viewBox="0 0 24 24"><path d="M0 0h24v24H0z" fill="none"/><path d="M3 18h18v-2H3v2zm0-5h18v-2H3v2zm0-7v2h18V6H3z"/></svg></span></span></span></header><div class=content><main class=post><div class=post-info></p></div><article><h2 class=post-title><a href=https://connerchu.com/research/atas/>Cross-Polarized Attosecond Transient Absorption Spectroscopy of Elemental Tellurium</a></h2><div class=post-content><p>This summer, I had the pleasure of working under Jonah Adelman in Prof. Stephen Leone’s group at UC Berkeley. Our group specializes in attosecond transient absorption pump-probe spectroscopy via high-harmonic generation, and my lab specifically focuses on applying this technique towards solid-state materials. Over the course of two months, my main objective was familiarizing myself with the first principles governing this spectroscopic method, and to conduct an experiment of my own, namely cross-polarizing the VIS-NIR pump beam and XUV probe beam in our setup to quantify the potential differences in absorption in elemental Tellurium. You can see my end of summer presentation <a href="https://docs.google.com/presentation/d/18qOD7k15k1lwhhwlrlWDNouyAlk_hKV5bYY0upQgMSc/edit?usp=sharing">here</a>. Look in the speaker notes for details! One thing to note was following my presentation, I conducted the alternating wave plate scan mentioned in the “Future Steps” slide. Unfortunately, we found no difference in the absorption or phonon generation between the co-polarized or cross-polarized pump-probe measurements. This likely indicates that the anisotropic characteristics of Tellurium are not manifested in the effects of core-level excitation.</p></div></article><hr><div class=post-info></div></main></div><footer class=footer><div class=footer__inner><div class=footer__content><span>© Copyright 2025</span></div></div><div class=footer__inner><div class=footer__content><span>Powered by Hugo, Djordje, and Matze</span></div></div></footer></div><script type=text/javascript src=/bundle.min.e89fda0f29b95d33f6f4224dd9e5cf69d84aff3818be2b0d73e731689cc374261b016d17d46f8381962fb4a1577ba3017b1f23509d894f6e66431f988c00889e.js integrity="sha512-6J/aDym5XTP29CJN2eXPadhK/zgYvisNc+cxaJzDdCYbAW0X1G+DgZYvtKFXe6MBex8jUJ2JT25mQx+YjACIng=="></script></body></html> |