{"doi":"10.1364/oe.462782","title":"Twisted light Michelson interferometer for high precision refractive index measurements","abstract":"<jats:p>Using orbital angular momentum beams in a Michelson interferometer opens the possibility for non-invasive measurements of refractive index changes down to 10<jats:sup>−6</jats:sup> refractive index units. We demonstrate the application of a twisted light interferometer to directly measure the concentration of NaCl and glucose solutions label-free and <jats:italic>in situ</jats:italic> and to monitor temperature differences in the mK-µK range. From these measurements we can extract a correlation of the refractive index to concentration and to temperature from a liquid sample which is in good agreement with literature. Applying this type of twisted light interferometry yields a novel, robust, and easily implementable method for <jats:italic>in situ</jats:italic> monitoring of concentration and temperature changes in microfluidic samples.</jats:p>","journal":"Optics Express","year":2022,"id":22908,"datarank":1.3887482057937552,"base_score":3.4657359027997265,"endowment":3.4657359027997265,"self_citation_contribution":0.519860385419959,"citation_network_contribution":0.8688878203737962,"self_endowment_contribution":0.519860385419959,"citer_contribution":0.8688878203737962,"corpus_percentile":null,"corpus_rank":null,"citation_count":31,"citer_count":31,"citers_with_citation_signal":21,"citers_with_endowment":21,"datacite_reuse_total":3,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":142500,"name":"Lucas I. 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