{"paper":{"title":"Crystal growth, measurement and modeling of the optical activity of $\\alpha$-GeO$_2$. Comparison with $\\alpha$-SiO$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexandra Pena, Benoit Boulanger, Bertrand Menaert, Corinne Felix","submitted_at":"2025-01-21T20:51:36Z","abstract_excerpt":"This work aimed first at growing high quality bulk $\\alpha$-GeO$_2$ crystals in their Quartz iso-structural form ($\\alpha$-SiO$_2$), using a high temperature flux method. By optimizing the flux composition and the geometry and orientation of the seeds, it has been possible to achieve growth yields up to 90 % leading for the first time to bulk single crystals up to 3.5 cm$^3$. Thanks to the optical quality and size of the obtained crystals, the second step of this study was the measurement of the optical activity of $\\alpha$-GeO$_2$ between 0.3 and 2 $\\mu$m. This gave access to the value of one"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.12496","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.12496/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}