{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T07:30:38Z","timestamp":1773991838399,"version":"3.50.1"},"reference-count":31,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2023,9,8]],"date-time":"2023-09-08T00:00:00Z","timestamp":1694131200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"QUANCOM project","award":["ARS01 00734"],"award-info":[{"award-number":["ARS01 00734"]}]},{"name":"Italian Space Agency","award":["ARS01 00734"],"award-info":[{"award-number":["ARS01 00734"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Traditional Hong-Ou-Mandel (HOM) interferometry, insensitive to photons phase mismatch, proved to be a rugged single-photon interferometric technique. By introducing a post-beam splitter polarization-dependent delay, it is possible to recover phase-sensitive fringes, obtaining a temporal quantum eraser that maintains the ruggedness of the original HOM with enhanced sensitivity. This setup shows promising applications in biological sensing and optical metrology, where high sensitivity requirements are coupled with the necessity to keep light intensity as low as possible to avoid power-induced degradation. In this paper, we developed a highly sensitive single photon birefringence-induced delay sensor operating in the telecom range (1550 nm). By using a temporal quantum eraser based on common path Hongr-Ou-Mandel Interferometry, we were able to achieve a sensitivity of 4 as for an integration time of\u00a02\u00b7104 s.<\/jats:p>","DOI":"10.3390\/s23187758","type":"journal-article","created":{"date-parts":[[2023,9,8]],"date-time":"2023-09-08T08:01:30Z","timestamp":1694160090000},"page":"7758","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Attosecond-Level Delay Sensing via Temporal Quantum Erasing"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0924-0698","authenticated-orcid":false,"given":"Fabrizio","family":"Sgobba","sequence":"first","affiliation":[{"name":"Italian Space Agency (ASI), Centro Spaziale \u2018Giuseppe Colombo\u2019, Localit\u00e0 Terlecchia, 75100 Matera, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7603-8537","authenticated-orcid":false,"given":"Andrea","family":"Andrisani","sequence":"additional","affiliation":[{"name":"Italian Space Agency (ASI), Centro Spaziale \u2018Giuseppe Colombo\u2019, Localit\u00e0 Terlecchia, 75100 Matera, Italy"}]},{"given":"Stefano","family":"Dello Russo","sequence":"additional","affiliation":[{"name":"Italian Space Agency (ASI), Centro Spaziale \u2018Giuseppe Colombo\u2019, Localit\u00e0 Terlecchia, 75100 Matera, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2854-5881","authenticated-orcid":false,"given":"Mario","family":"Siciliani de Cumis","sequence":"additional","affiliation":[{"name":"Italian Space Agency (ASI), Centro Spaziale \u2018Giuseppe Colombo\u2019, Localit\u00e0 Terlecchia, 75100 Matera, Italy"},{"name":"Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, L.go E. Fermi 6, 50125 Firenze, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0898-3569","authenticated-orcid":false,"given":"Luigi","family":"Santamaria Amato","sequence":"additional","affiliation":[{"name":"Italian Space Agency (ASI), Centro Spaziale \u2018Giuseppe Colombo\u2019, Localit\u00e0 Terlecchia, 75100 Matera, Italy"},{"name":"Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via Campi Flegrei N. 34, 80078 Pozzuoli, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2023,9,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2044","DOI":"10.1103\/PhysRevLett.59.2044","article-title":"Measurement of subpicosecond time intervals between two photons by interference","volume":"59","author":"Hong","year":"1987","journal-title":"Phys. Rev. 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