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However, applying DLS to supercooled molecular liquids and glasses demands exceptional experimental performance due to weak depolarized scattering, slow relaxation near the glass transition, and the need for quantitative comparison with complementary spectroscopic techniques. In this tutorial, we discuss how a depolarized dynamic light scattering (DDLS) setup can be tailored to meet these challenges. By combining conventional fiber-optical photon correlation spectroscopy and multispeckle photon correlation imaging with high-frequency DDLS, such a setup allows us to capture rotational dynamics across more than 20 orders of magnitude in time. We detail the experimental design required for high signal-to-noise ratios and long-term optical stability, alongside the treatment of coherence and partial heterodyning effects. As we demonstrate, after proper treatment, the different detection schemes yield the same electric-field autocorrelation function, enabling the construction of continuous, ultra-broadband DDLS datasets. Furthermore, multispeckle detection enables time-resolved correlation measurements without temporal averaging, extending DDLS to non-equilibrium systems such as aging molecular glasses. This methodology establishes a unified experimental framework for quantitative investigations of equilibrium and non-equilibrium molecular reorientation dynamics over an exceptionally broad time range.<\/jats:p>","DOI":"10.1063\/5.0354253","type":"journal-article","created":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T10:49:01Z","timestamp":1792666141000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Ultra-broadband and time-resolved depolarized dynamic light scattering for probing molecular dynamics in supercooled liquids and glasses"],"prefix":"10.1063","volume":"165","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2085-0075","authenticated-orcid":false,"given":"Till","family":"B\u00f6hmer","sequence":"first","affiliation":[{"name":"Institute of Frontier Materials on Earth and in Space, German Aerospace Center 1 , D-51147 Cologne,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5143-9265","authenticated-orcid":false,"given":"Rolf","family":"Zei\u00dfler","sequence":"additional","affiliation":[{"name":"Institute for Condensed Matter Physics, Technical University of Darmstadt 2 , D-64289 Darmstadt,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robin","family":"Schw\u00e4ch","sequence":"additional","affiliation":[{"name":"Institute for Condensed Matter Physics, Technical University of Darmstadt 2 , D-64289 Darmstadt,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7478-6366","authenticated-orcid":false,"given":"Jan P.","family":"Gabriel","sequence":"additional","affiliation":[{"name":"Institute of Frontier Materials on Earth and in Space, German Aerospace Center 1 , D-51147 Cologne,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9331-5172","authenticated-orcid":false,"given":"Florian","family":"Pabst","sequence":"additional","affiliation":[{"name":"International Centre for Theoretical Physics (ICTP) 3 , 34151 Trieste,","place":["Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9398-7577","authenticated-orcid":false,"given":"Thomas","family":"Blochowicz","sequence":"additional","affiliation":[{"name":"Institute for Condensed Matter Physics, Technical University of Darmstadt 2 , D-64289 Darmstadt,","place":["Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2026,10,22]]},"reference":[{"key":"2026102206490006900_c1","volume-title":"Dynamic Light Scattering: Applications of Photon Correlation Spectroscopy","year":"1985"},{"key":"2026102206490006900_c2","volume-title":"Dynamic Light Scattering: With Applications to Chemistry, Biology, and Physics","year":"2000"},{"key":"2026102206490006900_c3","doi-asserted-by":"publisher","first-page":"124512","DOI":"10.1063\/1.3478533","article-title":"Light scattering study on the glass former o-terphenyl","volume":"133","year":"2010","journal-title":"J.\u00a0Chem. 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